Steel structure construction whole process analysis method considering using stage load

Abstract

The invention discloses a steel structure construction whole process analysis method considering use stage load, which comprises the following steps: carrying out installation whole process finite element accumulation analysis on a construction process by utilizing finite element software to obtain a stress ratio RA of each rod piece; performing one-time forming finite element analysis on the same structure to obtain a stress ratio RB of each rod piece in a one-time forming state; comprehensive finite element analysis is carried out, and the stress ratio RC of each rod piece under the full-load and full-working condition is obtained; the sizes of RA and RB are judged, if RA is smaller than RB, the final stress ratio RD of all the rod pieces in the whole process of the construction stage and the use stage is equal to RC, and otherwise, the next step is carried out; and calculating RD according to RD = RA-RB + RC. According to the method, the non-eliminating internal force generated in the construction process is particularly considered, a brand new thought is provided for follow-up evaluation of the safety of the structure under the condition that the construction stress and the use load are comprehensively considered, it is ensured that the structure meets the design safety standard, and the application prospect is good.

Description

Technical Field

[0001] The present invention relates to the field of steel structure engineering construction, and relates to a method for analyzing the whole process of steel structure construction considering the loads in the service stage, and particularly relates to a method for analyzing the whole process of steel structure construction that particularly considers the non-eliminable internal forces generated during the construction process. Background Art

[0002] With the rapid rise of the steel structure building industry in China, numerous complex and large-span spatial structures have emerged. Compared with the process of simulation design relying on computer software, the actual construction process exhibits more complex characteristics. It is a dynamic process in which the structural system and its mechanical state change non-linearly continuously as the construction progresses. In this process, the structure grows from tiny to huge and from simple to complex, and its system and boundary conditions continue to evolve. At each construction stage, the structure may face challenges such as the adjustment of boundary conditions, the transformation of the system structure, the fluctuation of the construction environment temperature, and the dynamic adjustment of prestress in prestressed structures. Therefore, the mechanical state of the structure at each construction stage, including internal forces and displacements, etc., will have a significant and non-negligible impact on the mechanical performance of the structure in the next construction stage and even the entire subsequent construction process. However, the current simulation design method does not consider the non-eliminable internal forces generated during the construction process, that is, the construction additional stress. The existence of the construction additional stress has a significant impact on the internal forces and forms of the structure when it is finally formed, which leads to a large difference between the actual situation and the design, and may cause the structure to be difficult to meet the design standards, and there is a certain safety hazard in the actual application process, that is, the structural strength is low.

[0003] Therefore, it is of great practical significance to develop a method for analyzing the whole process of steel structure construction that particularly considers the non-eliminable internal forces generated during the construction process. Summary of the Invention

[0004] Due to the above-mentioned defects in the prior art, the present invention provides a method for analyzing the whole process of steel structure construction that particularly considers the non-eliminable internal forces generated during the construction process, specifically a method for analyzing the whole process of steel structure construction considering the loads in the service stage. On the basis of considering the construction additional stress, it provides a new solution to ensure that the structure can still meet the design safety standards when bearing the loads in the service stage.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A method for analyzing the whole process of steel structure construction considering the loads in the service stage, comprising the following steps:

[0007] (1) Using finite element software to perform finite element cumulative analysis on the entire installation process of the construction process to obtain the stress ratio R of each member A ;

[0008] (2) Conduct a finite element analysis of the same structure in step (1) for one-time forming to obtain the stress ratio R of each member in the one-time forming state B ;

[0009] (3) Comprehensively consider all loads and working conditions that the structure may bear, and use finite element software to conduct a comprehensive finite element analysis to obtain the stress ratio R of each member under all loads and all working conditions C ;

[0010] (4) Judge the magnitudes of R A and R B . If R A < R B , then the final stress ratio R D of each member during the whole process of the construction stage and the service stage is R C , that is, the additional stress is taken as 0, which means the beneficial influence of the construction process on the members is not considered. Otherwise, proceed to step (5);

[0011] (5) Calculate the final stress ratio R of each member during the whole process of the construction stage and the service stage according to the following formula D ;

[0012] R D = R A - R B + R C .

[0013] The analysis method for the whole process of steel structure construction considering the loads in the service stage of the present invention can accurately calculate the final stress ratio R D during the whole process of the construction stage and the service stage, especially considering the non-eliminable internal forces generated during the construction process, that is, the construction additional stress, providing a new idea for subsequent evaluation of the safety of the structure considering construction stress and service loads, so as to ensure that the structure meets the design safety standards and has good application prospects

[0014] As a preferred technical solution:

[0015] The analysis method for the whole process of steel structure construction considering the loads in the service stage as described above further includes:

[0016] (6) Individually for each member, judge whether its final stress ratio meets the specifications and design requirements;

[0017] (7) If the final stress ratio of any member does not meet the specifications and design requirements, re-formulate the construction plan and return to step (1). Otherwise, complete the analysis of the whole process of steel structure construction. Through the above steps, the safe operation state of the structure under the action of service stage loads can be effectively guaranteed

[0018] A method for the whole-process analysis of steel structure construction considering loads in the service stage as described above. In step (1), the finite element cumulative analysis is carried out based on the 1.3DL load, where DL is the self-weight of the structure.

[0019] A method for the whole-process analysis of steel structure construction considering loads in the service stage as described above. In step (2), when performing the finite element analysis for one-time forming, it is carried out based on the 1.3DL load, where DL is the self-weight of the structure.

[0020] The above technical solutions are only a feasible technical solution of the present invention. The protection scope of the present invention is not limited thereto, and those skilled in the art can reasonably adjust the specific design according to actual needs.

[0021] The above-mentioned invention has the following advantages or beneficial effects:

[0022] The current cumulative analysis of the whole construction process often ignores the superposition effect of nearby stresses on the loads in the subsequent service stage of the structure, which may pose a safety hazard to key members and positions. Specifically, the existing methods for cumulative analysis of the whole construction process often fail to fully consider the nearby stresses generated during construction when evaluating the structural safety. These stresses are superimposed with the loads in the subsequent service stage of the structure, which may pose a potential threat to the overall stability and safety of the structure. Especially for those members and positions that bear key forces, the impact of this superposition effect is particularly significant.

[0023] To solve this problem, the present invention proposes an innovative analytical method (i.e., a method for the whole-process analysis of steel structure construction considering loads in the service stage). Based on the whole-process analysis of construction, this method deeply considers the superposition effect of nearby stresses on the loads in the subsequent service stage of the structure. Through accurate calculation and analysis, this method can more accurately evaluate the overall safety of the structure during construction and use, thus providing a more reliable scientific basis for the construction and design of complex steel structures.

[0024] The proposal of this new analytical method not only fills the deficiencies of the existing methods for cumulative analysis of the whole construction process, but also provides a new idea for the whole-process analysis of complex steel structures. It helps to improve the accuracy and safety of structural design, reduce safety hazards during construction, provide a strong guarantee for the smooth progress of construction projects, and has good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, the present invention and its features, shape, and advantages will become more obvious. The same reference numerals indicate the same parts in all the drawings. The drawings are not drawn to scale, and the focus is on showing the gist of the present invention.

[0026] Figure 1 This is the sequence diagram of the analysis method for the whole process of steel structure construction considering the loads in the service stage of the present invention. Specific embodiments

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but it is not limited to the present invention.

[0028] Embodiment 1

[0029] An analysis method for the whole process of steel structure construction considering the loads in the service stage, the sequence is as Figure 1 shown, including the following steps:

[0030] (1) Use finite element software to conduct a finite element cumulative analysis of the entire installation process during construction to obtain the stress ratio R A of each member. The finite element cumulative analysis is carried out with 1.3DL load as the benchmark, where DL is the self-weight of the structure;

[0031] (2) Conduct a finite element analysis of the same structure in step (1) for one-time forming to obtain the stress ratio R B of each member in the one-time forming state. When conducting the finite element analysis of one-time forming, it is carried out with 1.3DL load as the benchmark;

[0032] (3) Use finite element software to conduct a comprehensive finite element analysis to obtain the stress ratio R C of each member under all loads and all working conditions;

[0033] (4) Judge the magnitudes of R A and R B . If R A < R B , then the final stress ratio R D of each member during the entire construction stage and service stage is R C , otherwise, go to step (5);

[0034] (5) Calculate the final stress ratio R D of each member during the entire construction stage and service stage according to the following formula;

[0035] R D = R A - R B + R C ;

[0036] (6) Individually for each member, judge whether its final stress ratio meets the specifications and design requirements;

[0037] If the final stress ratio of any member does not meet the specifications and design requirements, re - formulate the construction plan and return to step (1); otherwise, complete the analysis of the whole process of steel structure construction.

[0038] Verified, the method for analyzing the whole process of steel structure construction considering the loads in the service stage of the present invention can achieve the accurate calculation of the final stress ratio R D in the whole process of the construction stage and the service stage, especially considering the non - eliminable internal forces generated during the construction process, that is, the construction additional stress, which provides a new idea for the subsequent evaluation of the safety of the structure considering the construction stress and the service load, so as to ensure that the structure meets the design safety standards and has good application prospects.

[0039] Those skilled in the art should understand that those skilled in the art can realize variations in combination with the prior art and the above - mentioned embodiments, which will not be elaborated here. Such variations do not affect the essence of the present invention and will not be elaborated here.

[0040] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above - mentioned specific implementation manners. The equipment and structures not described in detail should be understood to be implemented in a common manner in the art; any person skilled in the art, without departing from the scope of the technical solution of the present invention, can make many possible changes and modifications to the technical solution of the present invention by using the methods and technical contents disclosed above, or modify it into equivalent embodiments with equivalent changes, which do not affect the essence of the present invention. Therefore, any simple modification, equivalent change and modification made to the above - mentioned embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the protection of the technical solution of the present invention.

Claims

1. A method for analyzing the whole process of steel structure construction considering loads during the service stage, characterized in that: It includes the following steps: (1) Use finite element software to conduct a finite element cumulative analysis of the entire installation process during construction to obtain the stress ratio R of each member A ; (2)Perform a finite element analysis of the same structure in step (1) for one-time forming to obtain the stress ratio R of each rod in the one-time forming state B ; (3)Perform a comprehensive finite element analysis using finite element software to obtain the stress ratio R of each member under full load and all working conditions C ; (4) Judge R A and R B for their magnitudes. If R A < R B , then the final stress ratios R D of each member during the whole process of the construction stage and the service stage are R C . Otherwise, proceed to step (5); (5) Calculate the final stress ratio R of each member during the entire construction stage and service stage according to the following formula D ; R D =R A -R B +R C 。 2. The whole-process analysis method for steel structure construction considering the loads in the service stage according to claim 1, wherein, It also includes: (6) For each member separately, judge whether its final stress ratio meets the code and design requirements; (7) If the final stress ratio of any member does not meet the code and design requirements, re-formulate the construction plan and return to step (1), otherwise, complete the analysis of the whole process of steel structure construction.

3. A method for analyzing the whole process of steel structure construction considering the loads during the service stage according to claim 1, characterized in that, In step (1), the finite element cumulative analysis is carried out based on the 1.3DL load, where DL is the self-weight of the structure.

4. The method for analyzing the whole process of steel structure construction considering the loads during the service stage according to claim 1, characterized in that, In step (2), when carrying out the finite element analysis of one-time forming, it is carried out based on the 1.3DL load, where DL is the self-weight of the structure.

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