Method for analyzing vertical deformation of construction truss of hanging column

Abstract

The application discloses a hanging column construction truss installation process vertical deformation analysis method, and belongs to the technical field of building engineering structure analysis. The method comprises the following steps: determining boundary conditions and calculation assumptions, formulating a load application scheme, dividing construction stage content, extracting analysis of key parts, construction process vertical deformation analysis and truss deformation law analysis. By setting a constraint mode that conforms to the actual situation for different components, an analysis model is constructed and the calculation assumption deviation trend is determined, so that deformation analysis errors are avoided. According to the actual construction process, the core construction content and sequence of each stage are determined, and the truss objects and nodes that need to be analyzed in each stage are locked. Through multi-working condition coverage, the influence of different construction operations on the truss deformation is presented, which helps engineers to identify deformation risk points in advance, dynamically tracks and quantifies the whole process of truss deformation, provides comprehensive and accurate deformation data archives for engineering, and supports construction acceptance and subsequent structure maintenance.

Description

Technical Field

[0001] This invention relates to the field of structural analysis technology in building engineering, and in particular to a method for analyzing vertical deformation during the installation of suspended column trusses. Background Technology

[0002] In super high-rise building projects, the suspended column-truss structure system is widely used in large headquarters buildings, commercial complexes and other projects because it can effectively optimize the building's spatial layout and reduce the structure's self-weight.

[0003] The installation process of trusses for such super high-rise suspended columns is significantly complex. Furthermore, existing technologies for analyzing the vertical deformation of trusses often have limitations. Some analysis methods fail to consider the dynamic characteristics of the entire construction process, relying solely on static load application and fixed constraints, thus failing to accurately reflect the impact of processes such as unloading the formwork and progressive component installation on deformation. While some methods consider construction phase divisions, they arbitrarily select key analysis areas, failing to focus on truss nodes with concentrated stress and high-risk areas, leading to the omission of crucial deformation information. Other methods lack a systematic extraction of deformation patterns, providing only discrete displacement data, which is insufficient to guide construction scheme optimization and deformation pre-adjustment. Summary of the Invention

[0004] The purpose of this invention is to provide a method for analyzing vertical deformation during the installation of suspended column trusses, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for analyzing vertical deformation during the installation of suspended column construction trusses, comprising: Determine boundary conditions and calculation assumptions, set boundary conditions, determine the constraint methods of structural members, construct an analysis model, and use beam elements to simulate members, plate elements to simulate concrete floor slabs, and truss elements to simulate suspended columns in the analysis model. It is clear that the vertical displacement calculation results will be too large due to this assumption. Develop a load application scheme, determine the overall self-weight coefficient, incorporate the floor slab self-weight, decoration load and curtain wall load into the dead load system, apply them together to the analysis model, and apply construction live load. The construction process is divided into several continuous construction phases with clearly defined content, based on the actual construction process of the suspended column. Each construction phase includes specific component installation, formwork operation and load application. The key operations related to truss installation and the vertical deformation that needs to be analyzed are clearly defined in each construction phase. Key component extraction and analysis: Based on the structural characteristics of the truss installation and the key stress areas, the key components for analysis are determined. For each key component, different analysis conditions are set to analyze the vertical deformation of the truss under different analysis conditions. Vertical deformation analysis during construction: According to the construction stage and analysis conditions, the entire construction process of truss installation is simulated, the vertical displacement of key parts of the truss under the corresponding working conditions is calculated, and the vertical deformation data is recorded. The deformation law of the truss is analyzed, and the vertical deformation data of the key parts of the truss are analyzed to summarize the vertical deformation law of the truss under different construction stages, different loads and different operating conditions.

[0006] Furthermore, the structural components include steel columns, formwork, secondary beams, cantilever beams, and hanging column nodes; Specifically, for steel columns, the constraint is set to a bottom rigid connection; for the formwork, the constraint is set to a bottom hinged connection; for secondary beams, the constraint is set to a one-end hinged and one-end fixed connection; for cantilever beams, the constraint is set to a rigid connection; and for suspended column nodes, the constraint is set to restrict the translational displacement of the suspended column nodes.

[0007] Furthermore, the formulation of the load application scheme specifically includes: Determine the overall self-weight coefficient and set its value to 1.05; The self-weight of the floor slab is calculated based on the difference in floor slab thickness, and the self-weight of the floor slab with different thicknesses is applied as part of the dead load to the corresponding floor slab position in the analysis model. The decoration load and curtain wall load are extracted from the YJK model, and the extracted decoration load and curtain wall load are incorporated into the dead load system. The loads are then applied to the analysis model according to their actual locations, thus completing the comprehensive application of the dead load. Based on the actual operational needs during the construction of the suspended columns, the scope of action of the construction live load is defined, which includes the platform passage area and the welding machine room area; Based on construction specifications and engineering practice experience, the values ​​of construction live loads for the platform passage area and welding machine room area are determined. According to the determined live load values ​​and range of action, the construction live loads are applied to the corresponding areas of the analysis model.

[0008] Furthermore, based on construction specifications and engineering practice experience, the values ​​of the construction live loads for the platform passage area and welding machine room area are determined, including: Based on the scope and target of the construction live load, the initial load values ​​that match the construction live load are obtained from construction specifications and engineering practice experience. Meteorological data of the area of ​​action of construction live load are obtained, wind tunnel tests are used to fit the wind load probability model in the area of ​​action, and an ambient temperature probability model in the area of ​​action is established. Based on the principle of spatiotemporal correspondence, all construction live loads are superimposed to obtain the load superposition matrix. Based on the initial load values, the common action load values ​​of the load superposition matrix are obtained. The wind load probability model and the combined load values ​​are coupled in real time to predict the first influence value of wind load on vertical deformation under the combined load values. The ambient temperature probability model and the combined load values ​​are coupled in real time to predict the second influence value of ambient temperature on vertical deformation under the combined load values. The comprehensive influence value is determined based on the first and second influence values. Determine whether the overall impact value is less than the preset impact value; If so, the initial load value will be used as the construction live load value for the platform passage area and welding machine room area; Otherwise, based on construction specifications and engineering practice experience, the adjustable range of the initial load value is obtained. Based on the difference between the comprehensive influence value and the preset influence value, the initial load value is adjusted with the adjustable range as a constraint. The adjusted value is used as the value of the construction live load in the platform passage area and welding machine room area.

[0009] Furthermore, the division of construction stages specifically includes: Based on the actual work process of suspended column construction from bottom to top and from core components to auxiliary components, combined with the division of the building floors and the installation sequence of key components, the entire construction process is divided into multiple continuous and clearly defined construction stages. Each construction phase is divided by the completion of a key construction operation within a specific floor range. The key construction operation is either unloading the formwork or pouring the floor slab. For each of the divided construction stages, the core construction contents directly related to truss installation in that stage are clearly defined. The core construction contents include component installation, formwork operation, and load-related contents. Mark the sequence of each core construction task; Based on the core construction content of each construction stage, the truss objects that need to be analyzed for vertical deformation in each construction stage are identified. The truss objects are the trusses that are newly installed or affected by construction operations in that stage. Identify the key deformation nodes that need to be focused on for each truss object to ensure that the vertical deformation analysis of the truss at each construction stage has a clear and precise direction.

[0010] Furthermore, the component installation category includes the installation of mega-columns, trusses, and suspended floors on corresponding floors; the formwork operation category includes the installation of formwork supporting suspended columns on corresponding axes and the unloading of formwork; and the load-related category includes the pouring of concrete for floor slabs on corresponding floors.

[0011] Furthermore, the extraction and analysis of the key components specifically includes: Based on the structural stress characteristics, load transfer path, and construction risk points of the truss installation, the key parts that need to be analyzed are identified. These key parts include the truss main body and truss nodes on different floors and axes. Among them, the main truss body covers the main truss installation area from low to high, and the truss nodes are the characteristic nodes on each truss body that are concentrated in force and sensitive to deformation. Position and label the spatial coordinates of each key component in the analysis model, as well as the corresponding floor and axis information; For each key component that has been identified, representative analysis conditions are set based on typical construction operations, load changes and constraint adjustments throughout the entire construction process of the suspended column. These analysis conditions include at least the conditions related to the formwork, the conditions related to the suspended column, and the conditions related to the load and installation. Establish a one-to-one correspondence between the analysis conditions and key components. Based on the construction sequence and stress influencing factors of each key component, determine all the analysis conditions that each key component must undergo to avoid omissions or mismatches of conditions, and develop a correlation comparison table.

[0012] Furthermore, the associated working conditions of the jig include the working conditions before jig unloading and the working conditions after jig unloading. The associated working conditions of the jig are used to analyze the influence of the jig support and unloading process on the vertical deformation of the truss. The associated working conditions of the suspended column include the working conditions before the suspended column is unloaded and the working conditions after the suspended column is unloaded. The associated working conditions of the suspended column are used to analyze the effect of the change in the stress state of the suspended column on the vertical deformation of the truss. The load and installation conditions include the installation conditions of the suspended layer, the pouring conditions of the floor slab, the decoration load and the curtain wall load application conditions. The load and installation conditions are used to analyze the disturbance of the installation of new components and the application of loads on the vertical deformation of the truss.

[0013] Furthermore, the vertical deformation analysis during the construction process specifically includes: The entire construction process of truss installation is simulated step by step in the analysis model according to the construction stage sequence. Before the simulation of each construction phase begins, the load conditions and boundary constraints of the analysis model are updated synchronously according to the construction content of that phase. For component installation content, add the corresponding component's self-weight load and connection constraints to the model; For the operation of the jig, add support constraints to the jig in the model during installation, and release the corresponding support constraints of the jig during unloading. For the floor slab pouring, apply the floor slab self-weight load of the corresponding floor in the model; After the load boundary conditions for each construction stage are updated, the vertical displacement of the key parts of the truss is calculated using structural mechanics analysis methods for the key parts and matching analysis conditions of that construction stage. During the calculation process, the vertical displacement values ​​of each node under different analysis conditions are solved. The vertical displacement values ​​include the maximum vertical displacement value and the minimum vertical displacement value. Establish a structured data recording system, and record deformation data for each construction stage according to the hierarchical relationship of construction stage, key parts, analysis conditions, characteristic nodes and vertical displacement values; The document clearly marks the floor range for each construction stage, the floor and axis information for key parts, the type of analysis condition, the specific identification of characteristic nodes, and the corresponding maximum and minimum vertical displacement values.

[0014] Furthermore, the analysis of the truss deformation pattern specifically includes: Based on deformation data, the data is classified and sorted according to construction stage and analysis condition type to form a multi-dimensional data comparison matrix; For the same key component, compare the differences in vertical deformation under different working conditions and analyze the impact of removing the jig support on truss deformation. For the same analytical condition, the vertical deformation patterns of key parts on different floors are compared, and the correlation characteristics between floor height and truss deformation are summarized. By classifying and comparing, the key influencing factors and changing trends of truss vertical deformation were initially identified; Based on the classification and comparison results, the vertical deformation pattern of the truss throughout the entire construction process was further refined and quantitatively characterized from both temporal and spatial dimensions: In terms of time, taking the construction phase sequence as the time axis, we analyze the cumulative process of vertical deformation of the same key part as the construction progress, the gradual change law of vertical displacement of characteristic nodes, and calculate the proportion of deformation increment in each stage to the total deformation. In terms of spatial dimension, using floors and axes as coordinates, we summarize the deformation distribution patterns of different key parts under the same working conditions, and transform the deformation patterns into quantifiable parameters through quantitative characterization.

[0015] Furthermore, it also includes: Positioning sensors are installed at key locations to monitor displacement data at each stage of the actual construction process in real time. Obtain historical construction data of super high-rise suspended columns, extract construction deviation types from historical construction data, and statistically determine the degree of influence of each construction deviation type on vertical deformation. Set type weights for each construction deviation type based on the degree of influence. Based on the displacement data of key parts under the current construction stage, the risk value of key parts under the current construction stage is calculated. When the risk value is greater than the preset risk value, an early warning is issued, and based on the risk value and the construction deviation type of the key parts, an emergency plan coefficient is calculated, and a target emergency plan that matches the emergency plan coefficient is retrieved from the emergency plan library for recommendation. Otherwise, no warning or reminder will be issued.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention precisely sets realistic constraint methods for different components such as steel columns, formwork, and secondary beams, constructs an analysis model using unit types that match the mechanical properties of the components, and clarifies the trend of calculation assumption deviations. This ensures the accuracy and rationality of structural simulation from the source, avoiding deformation analysis errors caused by improper constraints or model construction. It covers potential loads with an overall self-weight coefficient, calculates and applies self-weight according to the differences in floor slab thickness, extracts decoration and curtain wall loads using the YJK model, and then applies construction live loads in a targeted manner, forming a comprehensive and refined load system. This fully restores the load action state of the entire construction process, enabling the analysis model to accurately reflect the essence of structural stress and constraint, and comprehensively cover the influence of various loads.

[0017] 2. This invention divides the construction process into stages based on actual construction procedures and key operational nodes, clearly defining the core construction content and sequence of each stage. This ensures that the stage division is highly synchronized with the project progress, providing a clear framework for simulating the entire construction process step by step. Simultaneously, it identifies the truss objects and nodes to be analyzed in each stage, avoiding inefficient indiscriminate analysis. Based on structural stress, load paths, and construction risks, it determines key components, covering all critical trusses and sensitive nodes across the entire floor. Furthermore, it sets up various typical working conditions for each component, such as formwork, suspended columns, and loads, establishing a precise correlation between working conditions and components. This ensures that deformation analysis always focuses on key construction stages and critical structures, improving analysis efficiency and relevance. Through multi-condition coverage, the system presents the impact of different construction operations on truss deformation, helping engineers identify deformation risk points in advance. This provides clear guidance for developing targeted deformation control measures and rationally arranging the construction sequence, ensuring the safety and orderliness of the construction process.

[0018] 3. This invention simulates and dynamically updates loads and constraints step by step according to the construction stages, accurately calculates the vertical displacement of key parts at each stage under different working conditions, and records deformation data in a complete structured system. This enables dynamic tracking and quantification of the entire truss deformation process, accurately captures deformation details during construction, and extracts and quantifies deformation patterns from time and space dimensions through multi-dimensional data comparison. It clarifies the deformation accumulation process, the proportion of influence at each stage, and the differences in spatial distribution, providing engineers with a comprehensive and accurate deformation data archive to support construction acceptance and subsequent structural maintenance. It can also transform scattered data into actionable rule conclusions and provide a referable deformation analysis template for the construction of similar super high-rise suspended column trusses, significantly improving the engineering application value and promotion significance of this analysis method, and helping to ensure the accuracy and safety of super high-rise steel structure construction. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the truss vertical deformation analysis method of the present invention; Figure 2 This is a schematic diagram of the vertical displacement of the frame beam of the present invention; Figure 3 This is a schematic diagram of the vertical displacement of the 4-axis truss of the present invention; Figure 4 This is a schematic diagram of the vertical deformation during the unloading process of the 4-axle tire frame of the present invention. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-4 The present invention provides the following technical solutions: Methods for analyzing vertical deformation during the installation of suspended column trusses include: Determine the boundary conditions and calculation assumptions, set the boundary conditions, and determine the constraint methods of the structural components, including steel columns, formwork, secondary beams, cantilever beams, and hanging column nodes; Specifically, for steel columns, a bottom rigid connection constraint is set; for formwork, a bottom hinged connection constraint is set; for secondary beams, a constraint method of one end hinged and the other end fixed is set; for cantilever beams, a rigid connection constraint is set; and for suspended column nodes, the translational displacement of the suspended column nodes is restricted. An analysis model is constructed, in which beam elements are used to simulate members, plate elements are used to simulate concrete floor slabs, and truss elements are used to simulate suspended columns. It is clear that the vertical displacement calculation results will be overestimated due to this assumption. Develop a load application scheme, determine the overall self-weight coefficient, incorporate the floor slab self-weight, decoration load and curtain wall load into the dead load system, apply them together to the analysis model, and apply construction live load. The construction process is divided into several continuous construction phases with clearly defined content, based on the actual construction process of the suspended column. Each construction phase includes specific component installation, formwork operation and load application. The key operations related to truss installation and the vertical deformation that needs to be analyzed are clearly defined in each construction phase. Key component extraction and analysis: Based on the structural characteristics of the truss installation and the key stress areas, the key components for analysis are determined. For each key component, different analysis conditions are set to analyze the vertical deformation of the truss under different analysis conditions. Vertical deformation analysis during construction: According to the construction stage and analysis conditions, the entire construction process of truss installation is simulated, the vertical displacement of key parts of the truss under the corresponding working conditions is calculated, and the vertical deformation data is recorded. The deformation law of the truss is analyzed, and the vertical deformation data of the key parts of the truss are analyzed to summarize the vertical deformation law of the truss under different construction stages, different loads and different operating conditions.

[0022] In the above embodiments, from the perspective of structural simulation accuracy, constraint methods that fit the actual stress state are set for different structural components. The rigid connection at the bottom of the steel column meets the rigid support requirements when it bears vertical and horizontal loads. The hinged connection at the bottom of the frame matches its temporary support and can adapt to slight horizontal displacement. The hinged connection at one end of the secondary beam and the rigid connection at the other end with the cantilever beam accurately restores the force transmission path and constraint stiffness between components, effectively avoiding deformation analysis errors caused by deviations in the constraint method settings.

[0023] In the above embodiments, from the perspective of model construction rationality, beam elements, plate elements, and truss elements are used to simulate rods, concrete floor slabs, and hanging columns, respectively, which conforms to the mechanical characteristics of different components. The characteristic of truss elements that only transmit axial forces is highly consistent with the stress mode of hanging columns that mainly bear vertical tensile or compressive forces. At the same time, the assumption that the stiffness contribution of the stiffness reinforcement zone of the hanging column node is not considered, which leads to an overestimation of the vertical displacement calculation, is clearly stated. This simplifies the model construction difficulty, improves the calculation efficiency, and informs the deviation trend of the calculation results in advance, so that subsequent engineers can correct the results based on the actual situation and avoid misjudging the deformation data due to the lack of clear assumptions.

[0024] Develop a load application plan, specifically including: Determine the overall self-weight coefficient and set its value to 1.05; The self-weight of the floor slab is calculated based on the difference in floor slab thickness, and the self-weight of the floor slab with different thicknesses is applied as part of the dead load to the corresponding floor slab position in the analysis model. The self-weight of a 120mm thick floor slab is calculated as follows: The self-weight of a 150mm thick floor slab is calculated as follows: The self-weight of a 180mm thick floor slab is calculated as follows: ; The decoration load and curtain wall load are extracted from the YJK model, and the extracted decoration load and curtain wall load are incorporated into the dead load system. The loads are then applied to the analysis model according to their actual locations, thus completing the comprehensive application of the dead load. Based on the actual operational needs during the construction of the suspended columns, the scope of action of the construction live load is defined, which includes the platform passage area and the welding machine room area; Based on construction specifications and engineering practice experience, the values ​​of construction live loads for the platform passage area and welding machine room area are determined. According to the determined live load values ​​and range of action, the construction live loads are applied to the corresponding areas of the analysis model.

[0025] In one embodiment, the values ​​of the construction live load in the platform passage area and welding machine room area are determined based on construction specifications and engineering practice experience, including: Based on the scope and target of the construction live load, the initial load values ​​that match the construction live load are obtained from construction specifications and engineering practice experience. Meteorological data of the area of ​​action of construction live load are obtained, wind tunnel tests are used to fit the wind load probability model in the area of ​​action, and an ambient temperature probability model in the area of ​​action is established. Based on the principle of spatiotemporal correspondence, all construction live loads are superimposed to obtain the load superposition matrix. Based on the initial load values, the common action load values ​​of the load superposition matrix are obtained. The wind load probability model and the combined load values ​​are coupled in real time to predict the first influence value of wind load on vertical deformation under the combined load values. The ambient temperature probability model and the combined load values ​​are coupled in real time to predict the second influence value of ambient temperature on vertical deformation under the combined load values. The comprehensive influence value is determined based on the first and second influence values. Determine whether the overall impact value is less than the preset impact value; If so, the initial load value will be used as the construction live load value for the platform passage area and welding machine room area; Otherwise, based on construction specifications and engineering practice experience, the adjustable range of the initial load value is obtained. Based on the difference between the comprehensive influence value and the preset influence value, the initial load value is adjusted with the adjustable range as a constraint. The adjusted value is used as the value of the construction live load in the platform passage area and welding machine room area.

[0026] In this embodiment, the common load value of the load superposition matrix is ​​obtained based on the initial load value by accumulating the initial load values ​​at the same load-bearing location.

[0027] In this embodiment, ambient temperature affects the stiffness of the steel structure, which in turn affects the deformation.

[0028] The beneficial effects of the above design scheme are as follows: Based on the scope and target of the construction live load, initial load values ​​matching the construction live load are obtained from construction specifications and engineering practice experience, ensuring the rationality of the initial load values ​​and providing an accurate original numerical basis for subsequent adjustments. Meteorological data of the scope of the construction live load are obtained, and a wind load probability model within the scope is fitted using wind tunnel tests. An environmental temperature probability model within the scope is also established, providing an environmental data basis for considering environmental factors when determining the construction live load values. All construction live loads are superimposed based on the spatiotemporal correspondence principle to obtain a load superposition matrix. Based on the initial load values, the common action load values ​​of the load superposition matrix are obtained. Real-time coupling between the wind load probability model and the common action load values ​​is performed to predict the first influence value of wind load on vertical deformation under the common action load values. Real-time coupling between the environmental temperature probability model and the common action load values ​​is also performed to predict the second influence value of environmental temperature on vertical deformation under the common action load values. The impact value is determined by a comprehensive impact value based on the first and second impact values. This determines the vertical deformation caused by environmental influences under the initial load value, providing a basis for setting reasonable load values. The comprehensive impact value is then used to determine if it is less than a preset impact value. If so, the initial load value is used as the construction live load for the platform passage area and welding room area. Otherwise, based on construction specifications and engineering practice experience, the adjustable range of the initial load value is obtained. Based on the difference between the comprehensive impact value and the preset impact value, and constrained by the adjustable range, the initial load value is adjusted. The adjusted value is used as the construction live load for the platform passage area and welding room area. This achieves the optimality of the initial load value set considering environmental factors, and the reasonableness of the adjusted value is ensured by the adjustable range. This ensures that the final determined construction live load value can be optimally set according to actual needs and environmental factors, avoiding vertical deformation during installation from a construction perspective, and providing a basis for guiding construction scheme optimization and deformation pre-adjustment.

[0029] In the above embodiments, by determining an overall self-weight coefficient of 1.05, potential loads such as material self-weight deviation and component connection accessory weight that may exist during structural construction are taken into account. This avoids load omissions caused by calculating only theoretical self-weight, making the calculation of dead loads more in line with actual engineering scenarios and providing a more realistic load input basis for truss vertical deformation analysis.

[0030] In the above embodiments, the self-weight of floor slabs of different thicknesses is calculated and applied accordingly. At the same time, decoration loads and curtain wall loads are extracted from the YJK model. This ensures the integrity of the dead load system and restores the influence of load distribution differences in different areas on truss deformation through precise load zoning. The load in the thicker floor slab area is greater, and the deformation of the corresponding truss part may be more significant. This avoids the analysis error under the average load mode and improves the accuracy of deformation calculation.

[0031] In the above embodiments, the scope of the construction live load is clearly defined and the value is determined in combination with specifications and experience. The load types specific to the construction stage are specifically considered. Compared with the analysis scheme that only considers permanent loads, it more comprehensively covers the stress state of the truss throughout the construction process, ensuring that the analysis results can effectively guide the deformation control during the construction process. The deformation of the truss in the platform passage area needs to be monitored in detail to avoid the problem of excessive deformation caused by the action of live load.

[0032] The construction phases are divided into the following categories: Based on the actual work process of hanging column construction from bottom to top and from core components to auxiliary components, combined with the division of the building floors and the installation sequence of key components, the entire construction process is divided into multiple continuous and clearly defined construction stages. Each construction phase is divided by the completion of a key construction operation within a specific floor range. The key construction operation is either unloading the formwork or pouring the floor slab. For each of the divided construction stages, the core construction contents directly related to truss installation in that stage are clearly defined. The core construction contents include component installation, formwork operation, and load-related contents. The component installation category includes the installation of mega-columns, trusses, and suspended floors on corresponding floors; the formwork operation category includes the installation of formwork supporting suspended columns on corresponding axes and the unloading of formwork; the load-related category includes the concrete pouring of floor slabs on corresponding floors. Mark the sequence of each core construction task; Based on the core construction content of each construction stage, the truss objects that need to be analyzed for vertical deformation in each construction stage are identified. The truss objects are the trusses that are newly installed or affected by construction operations in that stage. Identify the key deformation nodes that need to be focused on for each truss object to ensure that the vertical deformation analysis of the truss at each construction stage has a clear and precise direction.

[0033] In the above embodiments, the construction stages are divided according to the actual work process from bottom to top and from core to auxiliary, combined with the floor division and the installation sequence of key components. Key operations such as unloading the formwork and pouring the floor slab are used as stage nodes, so that the stage division is highly synchronized with the actual construction progress of the project. This avoids abstract stage division that is detached from the construction process, making it easier for construction personnel to carry out deformation monitoring and analysis in stages. At the same time, it provides a clear stage framework for subsequent step-by-step simulation of the entire construction process, ensuring that the simulation process corresponds one-to-one with the actual construction steps.

[0034] In the above embodiments, the core construction content of each stage is clearly defined and its sequence is marked, such as installing the formwork first, then installing the truss, and finally unloading the formwork. This clearly presents the logical relationship and dependency sequence between each construction operation, providing a basis for the step-by-step updating of loads and boundary conditions in the analysis model. It helps engineers identify key operations at each stage that may affect truss deformation. The formwork unloading stage is prone to stress redistribution and sudden deformation changes in the truss, requiring special attention, so that targeted deformation control measures can be formulated in advance. By identifying the truss objects and key deformation nodes to be analyzed at each stage, indiscriminate analysis of all trusses is avoided, unnecessary calculations are reduced, analysis efficiency is improved, and the focus of analysis at each stage is highlighted.

[0035] Key component extraction and analysis, specifically including: Based on the structural stress characteristics, load transfer path and construction risk points of the truss installation, the key parts that need to be analyzed are identified. The key parts include the truss main body and truss nodes on different floors and axes. Among them, the main truss body covers the main truss installation area from low to high, and the truss nodes are the characteristic nodes on each truss body that are concentrated in force and sensitive to deformation. Position and label the spatial coordinates of each key component in the analysis model, as well as the corresponding floor and axis information; For each key component that has been identified, representative analysis conditions are set based on typical construction operations, load changes and constraint adjustments throughout the entire construction process of the suspended column. These analysis conditions include at least the conditions related to the formwork, the conditions related to the suspended column, and the conditions related to the load and installation. The associated working conditions of the jig include the working conditions before jig unloading and the working conditions after jig unloading. The associated working conditions of the jig are used to analyze the influence of the jig support and unloading process on the vertical deformation of the truss. The associated working conditions of the suspended column include the working conditions before the suspended column is unloaded and the working conditions after the suspended column is unloaded. The associated working conditions of the suspended column are used to analyze the effect of the change in the stress state of the suspended column on the vertical deformation of the truss. The load and installation conditions include the installation conditions of the suspended layer, the pouring conditions of the floor slab, the decoration load and the curtain wall load application conditions. The load and installation conditions are used to analyze the disturbance of the installation of new components and the application of loads on the vertical deformation of the truss. Establish a one-to-one correspondence between the analysis conditions and key components. Based on the construction sequence and stress influencing factors of each key component, determine all the analysis conditions that each key component must undergo to avoid omissions or mismatches of conditions, and develop a correlation comparison table.

[0036] In the above embodiments, key parts are determined based on structural stress characteristics, load transfer paths, and construction risk points, covering the truss main body and characteristic nodes of different floors and axes, ensuring the comprehensiveness of key parts and the criticality of the analysis object. Truss nodes with concentrated stress are sensitive to deformation, and their deformation directly reflects the overall stress state of the truss, avoiding the omission of key deformation information due to improper selection of analysis parts, and providing a guarantee for accurate grasp of the core data of truss deformation in the future.

[0037] In the above embodiments, multiple working conditions, such as those related to the formwork, the hanging column, and load and installation, are set for each key component. This comprehensively covers typical scenarios that may affect truss deformation throughout the entire construction process. For example, the analysis of the formwork unloading condition analyzes the impact of support removal on deformation, and the decoration load condition simulates deformation under the load of later use. The multi-condition analysis mode breaks the limitations of single-condition analysis and can systematically present the influence of different construction operations, load changes, and constraint adjustments on truss deformation. By comparing the deformation differences before and after formwork unloading, the inhibitory effect of formwork support on truss deformation can be quantified. At the same time, a one-to-one correspondence between working conditions and key components is established and a comparison table is created to avoid omissions or mismatches of working conditions. This ensures that the deformation of each key component under the construction conditions throughout its entire life cycle can be analyzed, providing a structured and systematic analysis framework for subsequent vertical deformation analysis and deformation law summarization during the construction process.

[0038] Vertical deformation analysis during construction includes: The entire construction process of truss installation is simulated step by step in the analysis model according to the construction stage sequence. Before the simulation of each construction phase begins, the load conditions and boundary constraints of the analysis model are updated synchronously according to the construction content of that phase. For component installation content, add the corresponding component's self-weight load and connection constraints to the model; For the operation of the jig, add support constraints to the jig in the model during installation, and release the corresponding support constraints of the jig during unloading. For the floor slab pouring, apply the floor slab self-weight load of the corresponding floor in the model; After the load boundary conditions for each construction stage are updated, the vertical displacement of the key parts of the truss is calculated using structural mechanics analysis methods for the key parts and matching analysis conditions of that construction stage. During the calculation process, the vertical displacement values ​​of each node under different analysis conditions are solved. The vertical displacement values ​​include the maximum vertical displacement value and the minimum vertical displacement value. Establish a structured data recording system, and record deformation data for each construction stage according to the hierarchical relationship of construction stage, key parts, analysis conditions, characteristic nodes and vertical displacement values; The document clearly marks the floor range for each construction stage, the floor and axis information for key parts, the type of analysis condition, the specific identification of characteristic nodes, and the corresponding maximum and minimum vertical displacement values.

[0039] In the above embodiments, the entire construction process is simulated step by step according to the construction stage sequence, and the loads and boundary constraints of each stage are updated synchronously. For example, self-weight and constraints are added when the component is installed, and support constraints are removed when the formwork is unloaded. This dynamic update mode restores the gradual change of the stress state of the structure during construction, avoids the static analysis error caused by applying all loads and constraints at once, and can accurately capture the stress redistribution and deformation mutation of the truss at the moment of formwork unloading. This makes the deformation calculation results more consistent with the dynamic deformation process in actual construction and improves the accuracy of analysis.

[0040] In the above embodiments, structural mechanics analysis methods are used to calculate vertical displacement for key parts and working conditions at each stage, focusing on the deformation quantification of characteristic nodes to ensure the professionalism and reliability of the calculation method. Furthermore, by capturing the maximum and minimum values, extreme states of truss deformation can be effectively identified, such as the maximum downward deformation of a node under the floor slab pouring condition. This provides a direct basis for judging whether the node exceeds the design allowable deformation range, helping engineers to provide early warning of deformation risks.

[0041] In the above embodiments, a structured recording system is established, and information in each dimension is clearly marked, making the deformation data clear, easy to trace, and convenient for subsequent data sorting and comparative analysis. It provides a complete deformation data archive for project acceptance and subsequent structural maintenance, and can quickly query the deformation history of a truss on a certain floor under specific working conditions, providing data support for structural safety assessment and disease diagnosis. At the same time, it avoids the problems of low analysis efficiency or data loss caused by chaotic data recording.

[0042] Analysis of truss deformation patterns, specifically including: Based on deformation data, the data is classified and sorted according to construction stage and analysis condition type to form a multi-dimensional data comparison matrix; For the same key component, compare the differences in vertical deformation under different working conditions and analyze the impact of removing the jig support on truss deformation. For the same analytical condition, the vertical deformation patterns of key parts on different floors are compared, and the correlation characteristics between floor height and truss deformation are summarized. By classifying and comparing, the key influencing factors and changing trends of truss vertical deformation were initially identified; Based on the classification and comparison results, the vertical deformation pattern of the truss throughout the entire construction process was further refined and quantitatively characterized from both temporal and spatial dimensions: In terms of time, taking the construction phase sequence as the time axis, we analyze the cumulative process of vertical deformation of the same key part as the construction progress, the gradual change law of vertical displacement of characteristic nodes, and calculate the proportion of deformation increment in each stage to the total deformation. In terms of spatial dimension, using floors and axes as coordinates, we summarize the deformation distribution patterns of different key parts under the same working conditions, and transform the deformation patterns into quantifiable parameters through quantitative characterization.

[0043] In one embodiment, it also includes: Positioning sensors are installed at key locations to monitor displacement data at each stage of the actual construction process in real time. Obtain historical construction data of super high-rise suspended columns, extract construction deviation types from historical construction data, and statistically determine the degree of influence of each construction deviation type on vertical deformation. Set type weights for each construction deviation type based on the degree of influence. Based on the displacement data of key parts under the current construction stage, the risk value of key parts under the current construction stage is calculated.

[0044] in, This indicates the risk value of key components during the current construction phase. This indicates the displacement value of key components during the current construction phase. Indicates the reference displacement threshold. This represents the percentage of construction deviation types that account for the largest proportion in key areas during the current construction phase. This represents the type weight of the construction deviation type that represents the largest proportion of critical parts during the current construction phase. This represents the type weight of the construction deviation type with the largest type weight in the critical parts at the current construction stage. This represents the percentage of construction deviation types with the highest type weight in the current construction phase. When the risk value is greater than the preset risk value, an early warning is issued, and based on the risk value and the construction deviation type of the key parts, an emergency plan coefficient is calculated, and a target emergency plan that matches the emergency plan coefficient is retrieved from the emergency plan library for recommendation.

[0045] in, This represents the emergency response coefficient, where n represents the number of construction deviation types in key areas during the current construction phase. This represents the type value of the i-th construction deviation type. express The floor value; Otherwise, no warning or reminder will be issued.

[0046] In this embodiment, the reference displacement threshold is preset based on the characteristics of the current construction stage and key parts.

[0047] In this embodiment, there are multiple types of construction deviations in key parts, such as deviations in the unloading time of the jig, reversed component installation sequence, and delayed load application. Each type of construction deviation has a different proportion in key parts, which is determined in advance based on the construction characteristics of the construction stage.

[0048] In this embodiment, the type value of the construction deviation type is preset and takes the value of (0.001, 0.005). The coefficient of each scheme in the emergency scheme library is also preset, and the two settings are related. The coefficient of each scheme is reasonably set based on the type value of the corrected construction deviation type corresponding to the scheme.

[0049] In this embodiment, The value of is less than 1, in order to obtain back, The integer part is used to match the risk level in the emergency response plan library. The alternative solutions, and then based on The decimal part is used to match the target emergency plan with the alternative plan and the construction deviation type, so as to achieve a second screening of the plan.

[0050] In this embodiment, the risk value of key parts under the current construction stage is calculated by considering two important factors: the specific values ​​of the maximum proportion and the maximum type weight, to ensure that the obtained risk value is more in line with the actual situation.

[0051] The beneficial effects of the above design scheme are as follows: By installing positioning sensors at key locations, displacement data at each stage of the actual construction process can be monitored in real time, enabling real-time monitoring of the construction process. Historical construction data of the super high-rise suspended columns can be obtained, construction deviation types can be identified from the historical data, and the impact of each type of construction deviation on vertical deformation can be statistically determined. Based on the degree of impact, a type weight is set for each construction deviation type. Based on the displacement data of key locations at the current construction stage, the risk value of key locations at the current construction stage is calculated, enabling real-time risk monitoring of deformation during construction. When the risk value exceeds a preset risk value, an early warning is issued. Based on the risk value and the construction deviation type of the key location, an emergency plan coefficient is calculated. A target emergency plan matching the emergency plan coefficient is retrieved from the emergency plan library for recommendation. This upgrades post-construction analysis to a real-time control system, preventing deformation exceeding limits during construction, reducing rework costs, and improving construction safety.

[0052] In the above embodiments, data is sorted out according to construction stage and working condition type and a comparison matrix is ​​formed. By comparing and analyzing different working conditions of the same key part and different floors of the same working condition, the key influencing factors of truss deformation can be quickly identified. For example, the comparison shows that the truss deformation increment is significant under the unloading condition of the formwork, indicating that the formwork support is the key factor controlling truss deformation. By comparing the deformation of trusses on different floors under the same load, the rule that the higher the floor, the greater the deformation is can be summarized, which provides a basis for formulating differentiated deformation control measures for different floors, avoids the single interpretation of deformation data, and improves the depth of analysis.

[0053] In the above embodiments, deformation patterns are extracted and quantified from both temporal and spatial dimensions. Analyzing the cumulative deformation process and the percentage of incremental changes at each stage over time clarifies the main stages of truss deformation. Spatially, the deformation distribution patterns are summarized. Quantitative characterization transforms abstract deformation patterns into concrete parameters, making the patterns more operational and facilitating their direct application to construction scheme optimization by engineers. This pattern extraction provides comprehensive guidance for subsequent construction, serves as a basis for verifying pre-adjustment strategies, clarifies key deformation control nodes and operational suggestions, and provides a referable pattern template for deformation analysis of similar super high-rise suspended column truss construction, enhancing the promotional value and engineering applicability of this analysis method.

[0054] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for analyzing vertical deformation during the installation of suspended column trusses, characterized in that, include: Determine the boundary conditions and calculation assumptions, set the boundary conditions, determine the constraint methods of the structural members, and construct the analysis model. In the analysis model, beam elements are used to simulate the members, plate elements are used to simulate the concrete floor slabs, and truss elements are used to simulate the hanging columns. Develop a load application scheme, determine the overall self-weight coefficient, incorporate the floor slab self-weight, decoration load and curtain wall load into the dead load system, apply them to the analysis model, apply construction live load, fit the wind load probability model and establish the ambient temperature probability model, superimpose the construction live load and obtain the load superposition matrix, obtain the common action load value of the load superposition matrix, couple the wind load probability model and the common action load value in real time, determine the comprehensive influence value and adjust the initial load value; The construction process is divided into several continuous construction phases with clearly defined content, based on the actual construction process of the suspended column. Each construction phase includes specific component installation, formwork operation and load application. The key operations related to truss installation and the vertical deformation that needs to be analyzed are clearly defined in each construction phase. Key component extraction and analysis: Based on the structural characteristics of the truss installation and the key stress areas, the key components for analysis are determined. For each key component, different analysis conditions are set to analyze the vertical deformation of the truss under different analysis conditions. Vertical deformation analysis during construction: According to the construction stage and analysis conditions, the entire construction process of truss installation is simulated, the vertical displacement of key parts of the truss under the corresponding conditions is calculated, the vertical deformation data is recorded, the displacement data is monitored in real time through positioning sensors and the risk value is calculated, and early warning is given based on the risk value. The deformation law of the truss is analyzed, and the vertical deformation data of the key parts of the truss are analyzed to summarize the vertical deformation law of the truss under different construction stages, different loads and different operating conditions.

2. The method for analyzing vertical deformation during the installation of suspended column trusses as described in claim 1, characterized in that, The structural components include steel columns, formwork, secondary beams, cantilever beams, and hanging column nodes; Specifically, for steel columns, the constraint is set to a bottom rigid connection; for the formwork, the constraint is set to a bottom hinged connection; for secondary beams, the constraint is set to a one-end hinged and one-end fixed connection; for cantilever beams, the constraint is set to a rigid connection; and for suspended column nodes, the constraint is set to restrict the translational displacement of the suspended column nodes.

3. The method for analyzing vertical deformation during the installation of suspended column trusses as described in claim 1, characterized in that, The formulation of the load application scheme specifically includes: Determine the overall self-weight coefficient and set its value to 1.05; The self-weight of the floor slab is calculated based on the difference in floor slab thickness, and the self-weight of the floor slab with different thicknesses is applied as part of the dead load to the corresponding floor slab position in the analysis model. The decoration load and curtain wall load are extracted from the YJK model, and the extracted decoration load and curtain wall load are incorporated into the dead load system. The loads are then applied to the analysis model according to their actual locations, thus completing the comprehensive application of the dead load. Based on the actual operational needs during the construction of the suspended columns, the scope of action of the construction live load is defined, which includes the platform passage area and the welding machine room area; Based on construction specifications and engineering practice experience, the values ​​of construction live loads for the platform passage area and welding machine room area are determined. According to the determined live load values ​​and range of action, the construction live loads are applied to the corresponding areas of the analysis model.

4. The method for analyzing vertical deformation during the installation of suspended column trusses as described in claim 3, characterized in that, Based on construction specifications and engineering practice experience, the values ​​of construction live loads for the platform access area and welding machine room area are determined, including: Based on the scope and target of the construction live load, the initial load values ​​that match the construction live load are obtained from construction specifications and engineering practice experience. Meteorological data of the area of ​​action of construction live load are obtained, wind tunnel tests are used to fit the wind load probability model in the area of ​​action, and an ambient temperature probability model in the area of ​​action is established. Based on the principle of spatiotemporal correspondence, all construction live loads are superimposed to obtain the load superposition matrix. Based on the initial load values, the common action load values ​​of the load superposition matrix are obtained. The wind load probability model and the combined load values ​​are coupled in real time to predict the first influence value of wind load on vertical deformation under the combined load values. The ambient temperature probability model and the combined load values ​​are coupled in real time to predict the second influence value of ambient temperature on vertical deformation under the combined load values. The comprehensive influence value is determined based on the first and second influence values. Determine whether the overall impact value is less than the preset impact value; If so, the initial load value will be used as the construction live load value for the platform passage area and welding machine room area; Otherwise, based on construction specifications and engineering practice experience, the adjustable range of the initial load value is obtained. Based on the difference between the comprehensive influence value and the preset influence value, the initial load value is adjusted with the adjustable range as a constraint. The adjusted value is used as the value of the construction live load in the platform passage area and welding machine room area.

5. The method for analyzing vertical deformation during the installation of suspended column trusses as described in claim 1, characterized in that, The division of construction stages specifically includes: Based on the actual work process of suspended column construction from bottom to top and from core components to auxiliary components, combined with the division of the building floors and the installation sequence of key components, the entire construction process is divided into multiple continuous and clearly defined construction stages. Each construction phase is divided by the completion of a key construction operation within a specific floor range. The key construction operation is either unloading the formwork or pouring the floor slab. For each of the divided construction stages, the core construction contents directly related to truss installation in that stage are clearly defined. The core construction contents include component installation, formwork operation, and load-related contents. Mark the sequence of each core construction task; Based on the core construction content of each construction stage, the truss objects that need to be analyzed for vertical deformation in each construction stage are identified. The truss objects are the trusses that are newly installed or affected by construction operations in that stage. Identify the key deformation nodes that need to be focused on for each truss object to ensure that the vertical deformation analysis of the truss at each construction stage has a clear and precise direction; The component installation category includes the installation of mega-columns, trusses, and suspended floors on the corresponding floors; the formwork operation category includes the installation of formwork supporting suspended columns on the corresponding axis and the unloading of formwork; the load-related category includes the pouring of concrete for the floor slabs on the corresponding floors.

6. The method for analyzing vertical deformation during the installation of suspended column trusses as described in claim 1, characterized in that, The key component extraction and analysis specifically includes: Based on the structural stress characteristics, load transfer path, and construction risk points of the truss installation, the key parts that need to be analyzed are identified. These key parts include the truss main body and truss nodes on different floors and axes. Among them, the main truss body covers the main truss installation area from low to high, and the truss nodes are the characteristic nodes on each truss body that are concentrated in force and sensitive to deformation. Position and label the spatial coordinates of each key component in the analysis model, as well as the corresponding floor and axis information; For each key component that has been identified, representative analysis conditions are set based on typical construction operations, load changes and constraint adjustments throughout the entire construction process of the suspended column. These analysis conditions include at least the conditions related to the formwork, the conditions related to the suspended column, and the conditions related to the load and installation. Establish a one-to-one correspondence between the analysis conditions and the key components. Based on the construction sequence and stress influencing factors of each key component, determine all the analysis conditions that each key component must undergo and formulate a correlation comparison table.

7. The method for analyzing vertical deformation during the installation of suspended column trusses as described in claim 6, characterized in that, The associated working conditions of the jig include the working conditions before jig unloading and the working conditions after jig unloading. The associated working conditions of the jig are used to analyze the influence of the jig support and unloading process on the vertical deformation of the truss. The associated working conditions of the suspended column include the working conditions before the suspended column is unloaded and the working conditions after the suspended column is unloaded. The associated working conditions of the suspended column are used to analyze the effect of the change in the stress state of the suspended column on the vertical deformation of the truss. The load and installation conditions include the installation conditions of the suspended layer, the pouring conditions of the floor slab, the decoration load and the curtain wall load application conditions. The load and installation conditions are used to analyze the disturbance of the installation of new components and the application of loads on the vertical deformation of the truss.

8. The method for analyzing vertical deformation during the installation of suspended column trusses as described in claim 1, characterized in that, The vertical deformation analysis during the construction process specifically includes: The entire construction process of truss installation is simulated step by step in the analysis model according to the construction stage sequence. Before the simulation of each construction phase begins, the load conditions and boundary constraints of the analysis model are updated synchronously according to the construction content of that phase. For component installation content, add the corresponding component's self-weight load and connection constraints to the model; For the operation of the jig, add support constraints to the jig in the model during installation, and release the corresponding support constraints of the jig during unloading. For the floor slab pouring, apply the floor slab self-weight load of the corresponding floor in the model; After the load boundary conditions for each construction stage are updated, the vertical displacement of the key parts of the truss is calculated using structural mechanics analysis methods for the key parts and matching analysis conditions of that construction stage. During the calculation process, the vertical displacement values ​​of each node under different analysis conditions are solved. The vertical displacement values ​​include the maximum vertical displacement value and the minimum vertical displacement value. Establish a structured data recording system, and record deformation data for each construction stage according to the hierarchical relationship of construction stage, key parts, analysis conditions, characteristic nodes and vertical displacement values; The document clearly marks the floor range for each construction stage, the floor and axis information for key parts, the type of analysis condition, the specific identification of characteristic nodes, and the corresponding maximum and minimum vertical displacement values.

9. The method for analyzing vertical deformation during the installation of suspended column trusses as described in claim 1, characterized in that, The analysis of the truss deformation pattern specifically includes: Based on deformation data, the data is classified and sorted according to construction stage and analysis condition type to form a multi-dimensional data comparison matrix; For the same key component, compare the differences in vertical deformation under different working conditions and analyze the impact of removing the jig support on truss deformation. For the same analytical condition, the vertical deformation patterns of key parts on different floors are compared, and the correlation characteristics between floor height and truss deformation are summarized. By classifying and comparing, the key influencing factors and changing trends of truss vertical deformation were initially identified; Based on the classification and comparison results, the vertical deformation pattern of the truss throughout the entire construction process was further refined and quantitatively characterized from both temporal and spatial dimensions: In terms of time, taking the construction phase sequence as the time axis, we analyze the cumulative process of vertical deformation of the same key part as the construction progress, the gradual change law of vertical displacement of characteristic nodes, and calculate the proportion of deformation increment in each stage to the total deformation. In terms of spatial dimension, using floors and axes as coordinates, we summarize the deformation distribution patterns of different key parts under the same working conditions, and transform the deformation patterns into quantifiable parameters through quantitative characterization.

10. The method for analyzing vertical deformation during the installation of suspended column construction trusses as described in claim 1, characterized in that, Also includes: Positioning sensors are installed at key locations to monitor displacement data at each stage of the actual construction process in real time. Obtain historical construction data of super high-rise suspended columns, extract construction deviation types from historical construction data, and statistically determine the degree of influence of each construction deviation type on vertical deformation. Set type weights for each construction deviation type based on the degree of influence. Based on the displacement data of key parts under the current construction stage, the risk value of key parts under the current construction stage is calculated. When the risk value is greater than the preset risk value, an early warning is issued, and based on the risk value and the construction deviation type of the key parts, an emergency plan coefficient is calculated, and a target emergency plan that matches the emergency plan coefficient is retrieved from the emergency plan library for recommendation. Otherwise, no warning or reminder will be issued.

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