27 results about "Design values" patented technology

The invention discloses a digital assembling method and system for a steel truss girder, and the method comprises the steps: carrying out the scanning measurement of a to-be-hoisted steel member through multi-source measurement equipment, and obtaining three-dimensional point cloud data and feature point coordinates; and fusing the data through a registration algorithm, and constructing a component digital model. Acquiring an environment temperature, a component temperature and a supporting state during scanning; on the basis of the information, temperature deformation and self-weight deformation correction is carried out on the model, and a model for assembling is obtained; geometric information is extracted and compared with a design value, and a deviation table and modification suggestions are generated. Dynamically and virtually assembling the corrected model according to an actual hoisting sequence; and simulating stay cable tensioning in a preset stage, and calculating the internal force and deformation of the structure. After virtual hoisting, three-dimensional coordinates of a non-assembly end are calculated in real time, and comparison and guidance are carried out; and actually measuring the three-dimensional coordinates and the physical postures of the hoisted rod pieces for subsequent virtual assembly of the rod pieces. According to the method, the construction quality and efficiency are improved.

This invention relates to the field of architectural design technology, specifically to a microclimate prediction method, apparatus, device, and medium based on machine learning. The invention first sets design values ​​for the architectural design variables of a single building, and then applies a machine learning model to these design values ​​to predict the microclimate changes that the single building, designed based on these values, will bring to the surrounding environment. Because this invention is based on the design values ​​of a single building, it can predict the impact of a single building on the microclimate of its surrounding environment. Furthermore, using a machine learning model to predict microclimate does not require spending a significant amount of time building a building model; it can directly predict microclimate, thereby improving prediction efficiency.

A cohesive-based high-slump pumped concrete mix design method for road construction is disclosed. This method involves determining the allowable value of the pressure bleeding rate of the concrete; conducting trial mix design based on the design parameters of the concrete pavement and calculating the standard value of the pressure bleeding rate; calculating temperature correction factors and transport time correction factors; adjusting the standard value of the pressure bleeding rate based on these factors to calculate the design value of the pressure bleeding rate; and determining whether the design value of the pressure bleeding rate meets the allowable value. This cohesive-based high-slump pumped concrete mix design method can predict and ensure that the cohesiveness of the prepared concrete meets construction requirements during the mix design stage, thereby guaranteeing concrete quality.

A technology is provided that can predict the environmental load of a manufacturing process based on the influencing factors of the manufacturing process at the design stage. [Solution] The environmental load prediction device of the present invention stores a prediction formula configured to calculate the environmental load using parameters that represent the characteristics of parts processed in the manufacturing process, and predicts (simulates) the environmental load of the manufacturing process by reading the parameters from process data that describes the design values ​​of the parameters and substituting them into the prediction formula.

The application relates to the technical field of scaffold scheme checking, and particularly discloses a scaffold scheme checking system, which comprises a model construction module, a parameter input module and a checking module. The model construction module is used for setting a structure parameter design table and a design standard value corresponding to a scaffold building type under different scaffold safety levels, inputting steel pipe sizes and corresponding characteristic parameters, and inputting a calculation formula of the related parameters. The parameter input module is used for obtaining the scaffold building type, the structure parameters and the steel pipe sizes of the scaffold. The checking module is used for calculating the design value of the scaffold according to the scaffold building type, the structure parameters and the steel pipe sizes of the steel pipes used, comparing and analyzing the design value with the design standard value, and outputting a scaffold checking result. The application realizes checking of a scheme before scaffold building, safety level and risk assessment of the scaffold after building, and makes the operation personnel accurately and timely know the construction risk of the scaffold, so that the construction safety is ensured.

This application belongs to the field of truss boom parameter optimization technology, specifically involving a multi-objective optimization design method and system for port crane truss booms. First, the minimum set of parameters that determine the boom structure is selected as the design parameters. The design space is sampled based on the optimal Latin hypersolution method. Computational fluid dynamics-static fluid-structure interaction calculations are carried out taking into account the characteristics of the shore wind field to obtain the wind resistance, strength, and stiffness indices of each sampling point. A surrogate model is constructed using the deep learning DAL algorithm, with dimensions as input and wind load, strength, stiffness, and other indices as outputs. Furthermore, the optimal design value within the design space is obtained by improving the dung beetle optimization algorithm, and the optimal design value that satisfies the premise of strength, stiffness, and stability is constructed and output.

The invention belongs to the field of ocean engineering, and provides a design method and system of an ocean engineering grouting system based on finite element analysis. The method comprises the steps that structural parameters, input by a user, of all components of the ocean engineering grouting system are received, geometric expression logic models of all the components are constructed, and the structural parameters of the corresponding components which do not meet the structural connection / arrangement requirement are adjusted; on the basis of the structural parameters of all the components meeting the structural connection / arrangement requirements, a finite element model of each component is constructed until the calculated ultimate strength and fatigue life are the same as design values; automatically calculating standard mechanical property parameters of each component based on a standard clause database and an input load, and comparing the standard mechanical property parameters with simulated mechanical property parameters, simulated by the finite element model, of each component until the standard mechanical property parameters and the simulated mechanical property parameters of all the components are consistent; and outputting a CAD drawing of the ocean engineering grouting system composed of all the components.

The invention relates to the technical field of building waterproofing, in particular to a single-layer roof coiled material wind load resistance calculation method. The method comprises the following steps: acquiring basic parameter information of a construction house; calculating a wind load design value omega d of the roof and a width parameter E of a fixed part encryption area; carrying out regional division on the roof according to the roof form; according to the roof coiled material fixing mode, the row distance L and the plant distance S of coiled material fixing pieces in all areas of a roof and the number N of the fixing pieces per unit length are calculated; and calculating the use amount Am of the coiled material according to the roof form. According to the technical scheme, the wind load design value and the width of the encrypted area are calculated based on the basic building parameters, the row spacing and the plant spacing of the fixing pieces are optimized according to the fixing mode to meet standard requirements, the coiled material consumption and the loss rate are calculated, the efficiency and accuracy of roof waterproof coiled material construction can be remarkably improved, and manual errors are reduced.

The application discloses a method and device for determining design parameters of a composite cylinder type of an offshore wind farm, comprising obtaining and analyzing physical characteristics and mechanical characteristics of soil samples, combining environmental parameters to establish an engineering geological environment evaluation model, inputting the design parameters of the composite cylinder type into the engineering geological environment evaluation model to calculate actual design values of the composite cylinder type, and judging whether the design parameters meet construction conditions. The method for determining the design parameters of the composite cylinder type of the offshore wind farm according to the embodiment of the application comprehensively considers the physical characteristics and mechanical characteristics of the soil samples of the installation site, so that the optimization process of the design parameters of the composite cylinder type is more flexible, comprehensive, accurate and efficient, and the safety and stability during the operation of the wind turbine are ensured.

The invention relates to the field of structural engineering aseismic design, and particularly discloses a buckling restrained brace steel frame aseismic design method based on horizontal sharing rate optimization, which comprises the following steps: establishing a parameterized analysis model taking a horizontal sharing rate beta as a variable, carrying out elastic-plastic dynamic time-history analysis, and extracting whole-process response data; the method comprises the following steps of: calculating an instantaneous equivalent horizontal sharing rate beta (t) representing dynamic evolution of internal force distribution and a stability index of the instantaneous equivalent horizontal sharing rate beta (t), and finally, performing multi-objective optimization solution on beta by taking the stability index and at least one other performance index as an optimization objective, so as to obtain a horizontal sharing rate design value with optimal robustness, and finish the design of the section of the component according to the horizontal sharing rate design value. According to the method, quantitative evaluation and active optimization of the stability of the force distribution path in the whole period of the structure under the action of an earthquake are realized, and the anti-seismic robustness, the collaborative energy consumption efficiency and the comprehensive economy of the buckling restrained brace steel frame are improved.

The application discloses a wind turbine tower reliability optimization method based on a probability checking safety coefficient, belongs to the field of tower reliability optimization design, and divides the safety coefficient checking into uncertain variable design values and characteristic values, constructs a multi-target reliability optimization design problem, constructs a mapping relationship between the uncertain variable design values and reliability, combines fixed quantile characteristic values, establishes a safety coefficient library available under different reliabilities, adopts a Wasserstein distance to evaluate the change degree of environmental load and guide safety coefficient selection in view of dynamic environmental load and different reliability design requirements, converts a complex reliability optimization problem into a deterministic optimization model for fast and efficient solution by matching the characteristic value quantile of the environmental parameters and the safety coefficient of the target reliability, obtains tower structure design variables, saves the calculation cost and design redundancy, and uses the design variables for the tower, which can improve the reliability of the tower under different service environments.

The application discloses a steel truss digital assembly method and system, the method comprising: using a multi-source measuring device to scan and measure a steel component to be hoisted, obtaining three-dimensional point cloud data and characteristic point coordinates; fusing data through a registration algorithm to construct a component digital model. The ambient temperature, component temperature and support state during scanning are obtained; based on this information, the model is respectively corrected for temperature deformation and self-weight deformation to obtain an assembly model; geometric information is extracted and compared with design values to generate a deviation table and modification suggestions. The corrected model is dynamically virtually assembled according to the actual hoisting sequence; the cable stay tensioning at a preset stage is simulated to calculate the internal force and deformation of the structure. After virtual hoisting, the three-dimensional coordinates of the non-assembly end are calculated in real time and compared and guided; the three-dimensional coordinates and physical posture of the hoisted member are measured and used for subsequent virtual assembly of the member. The method improves construction quality and efficiency.

The application discloses a kind of midspan closure construction methods, it is related to bridge construction technical field, including the following steps: after the strength of side span concrete reaches design value, elastic modulus reaches design value, and after age period is not less than 7 days, install closure support, record each day temperature data in the age period of side span concrete strength, and temperature data is summarized into the temperature curve of each day, the low temperature interval of each day is counted, the intersection of low temperature interval is taken, to determine pouring time;Pouring of midspan closure section concrete is carried out in the lowest temperature period in a day;When the strength and elastic modulus of closure section concrete reach design value, unload the top force of beam body top and bottom plate on the both sides of midspan closure section, remove temporary locking rigidity;Remove closure hanger, tension and anchor longitudinal prestressed beam.The application is provided to continuously monitor local environmental temperature within the period after side span construction, and summarize the midspan closure construction method of temperature data.

The invention relates to the technical field of arch bridge construction, operation and maintenance, in particular to an arch bridge temperature effect calculation method which comprises the following steps: S1, acquiring spatial and temporal distribution characteristics of a typical section temperature field of an arch rib, including an average temperature time domain change rule, a vertical temperature difference time domain evolution characteristic and a transverse temperature difference time domain evolution characteristic; s2, on the basis of an average temperature time domain change rule, a structural closure control temperature is combined, and a design value of long-term temperature increasing and decreasing is calculated; on the basis of vertical temperature difference time domain evolution characteristics, locking the most unfavorable time period of the vertical temperature difference, and fitting a vertical temperature difference mode of a typical section; and on the basis of the transverse temperature difference time domain evolution characteristics, locking the most unfavorable time period of the transverse temperature difference, and fitting the transverse temperature difference mode of the typical cross section. According to the method, the defect that subsequent structural design and operation maintenance are lack of accurate and quantitative theoretical support and technical basis due to the fact that an existing bridge design specification does not clearly stipulate an arch bridge temperature calculation method can be overcome.

The invention discloses a pile sinking geometric parameter determination method which comprises the following steps: (1) acquiring three-dimensional coordinate data of a plurality of measuring points on the surface of a pile sinking, and preprocessing the three-dimensional coordinate data; (2) judging the number of required alternative axis vectors and calculating the alternative axis vectors by using the distribution indexes of the measuring points; (3) calculating a pile sinking radius and an error degree corresponding to each alternative axis vector; (4) the optimal initial value of the pile sinking geometric parameter is screened out according to the minimum error degree; and (5) the optimal pile sinking geometric parameters are fitted according to the optimal initial value. The method is suitable for various measuring point distribution conditions, pile sinking geometric parameters are rapidly, accurately and stably determined, the pile sinking geometric parameters are compared with design values, deviation is calculated, and whether engineering requirements are met or not is rapidly and accurately judged.

The invention discloses a quality control method for detecting the size of a concrete component based on a BIM (Building Information Modeling) model, which comprises four stages of preparation before construction and digital reference establishment, field measurement system layout, real-time measurement and intelligent judgment, and closed-loop deviation correction and reinspection, and comprises the following steps: deepening the BIM model in Revit and hooking a design value and an allowable deviation parameter; according to the method, a stable measurement datum point is arranged, software and hardware systems of a laser range finder and a mobile terminal are integrated, automatic comparison, intelligent judgment and visual feedback of measured data and model data are achieved, and meanwhile a traceable electronic quality file is formed. The method has the advantages of being remarkable in effect, high in reliability, small in error, wide in application range, easy to operate, controllable in construction quality and the like, and the construction quality of the cast-in-place concrete component can be effectively improved.

The invention belongs to the technical field of truss arm parameter optimization, and particularly relates to a multi-objective optimization design method and system for a truss arm of a port crane, and the method comprises the steps: firstly, selecting a minimum parameter set for determining an arm support structure as a design parameter, and carrying out the sampling of a design space based on an optimal Latin super-cubic method; the method comprises the following steps: carrying out computational fluid mechanics-statics fluid-solid coupling calculation by considering shoreside wind field characteristics to obtain wind resistance, strength and rigidity indexes of each sampling point, constructing an agent model with the size as input and the wind load, strength, rigidity and other indexes as output by adopting a deep learning DAL algorithm, and further obtaining a model in a design space by improving a dung beetle optimization algorithm, and constructing and outputting an optimal design value on the premise of meeting the strength, the rigidity and the stability.

The invention provides a tall and large system window design and installation method, which comprises the following steps of: calculating a wind load standard value, a design value, an earthquake load, a load combination standard value and a design value of an aluminum alloy mullion according to information such as a geographic position of a project, a use demand of a construction party and door and window hole height, and performing system selection according to a calculation result; drawing a system window cross section drawing and a system window vertical section drawing, and determining the sizes of transverse grids and vertical grids; selecting, mounting and designing an aluminum alloy system window frame and an auxiliary frame; drawing a calculation sketch and a stress sketch of the aluminum alloy mullion, and carrying out specification preselection and installation design on the aluminum alloy mullion; the specifications of all parts for connecting the aluminum alloy mullion and the main body concrete structure are designed; and finally determining a node practice. And placing orders and manufacturing the materials, and transporting to field installation and acceptance. The structure stress problem of a common aluminum alloy system window opening with the height ranging from 3 meters to 6 meters is solved, the system can be installed on indoor floors, the outdoor high-altitude operation amount is reduced, the high-altitude operation risk is reduced, and the construction difficulty is reduced.

The invention relates to the field of buildings, in particular to a simple and convenient vehicle structural floor operation bearing capacity rechecking method, which comprises the following steps: collecting related load information of a structural floor and a construction vehicle, analyzing the operation working condition of the construction vehicle, determining the most unfavorable working condition and corresponding parameters, calculating an equivalent uniformly distributed load as a live load through an SCCT tool box, and calculating the working bearing capacity of the structural floor on the vehicle. The load combination design value Sc of the construction working condition is obtained after the Sc is combined with the dead load of the completed building surface layer on the floor slab surface, the load combination design value Sc is compared with the load combination design value Sd of the structural floor slab under the design working condition in the construction drawing, and if Sc is smaller than Sd, the bearing capacity of the structural floor slab meets the vehicle operation requirement; and if Sc is greater than Sd, getting-on operation can be carried out after relevant reinforcing measures are taken on the structural floor slab. The method is simple in calculation step, low in starting difficulty, low in requirement for the level of technicians, high in generalization performance and capable of greatly improving efficiency.

The application discloses a prestressed concrete bridge rapid evaluation method based on elastic modulus, and belongs to the technical field of bridge engineering nondestructive testing and health monitoring. The method first selects a key test area and a load working condition according to bridge stress characteristics; subsequently, adopts an impact elastic wave technology to test a tangent elastic modulus of concrete on site; further, inverses actual stress levels of the structure through elastic modulus changes based on a concrete constitutive model, and identifies damage states in combination with wave speed analysis; finally, compares measured stress levels with design values, and comprehensively considers damage conditions, so that rapid grading evaluation of bridge bearing capacity and safety conditions is realized. The application realizes rapid, nondestructive and quantitative evaluation of the prestressed concrete bridge, overcomes the limitations of high cost, long cycle or difficulty in reflecting overall stress states of traditional methods, and is suitable for conventional screening, emergency evaluation and on-site calibration of a health monitoring system of the bridge.

The invention discloses a pile foundation design method considering the exertion degree of pile side and pile end resistance. Comprising the steps that the ultimate bearing capacity of a single pile is determined, geometric parameters of a pile body are preliminarily set, the compression amount of the pile body and the settlement amount of the pile end are calculated, the pile-soil relative displacement value of each layer of buried depth is calculated, and the pile side resistance exerting coefficient and the pile end resistance exerting coefficient of each layer of soil are calculated; calculating the actual pile side resistance and the pile end resistance of each layer of soil to determine the limit value of the bearing capacity of the single pile, comparing the calculated bearing capacity of the single pile with a design value, and if the calculated value is too large or too small than the design value, adjusting the geometric parameters of the pile body to continue cyclic calculation until the designed value is reached. Compared with an existing standard calculation method, the method has the advantages that the stress state and the bearing character of the pile can be reflected more truly, and the calculation result is more real, objective and reliable; by dynamically adjusting the pile length and the pile diameter, the resistance exerting coefficients of the pile side and the pile end of each layer of soil are synchronously exerted to the maximum value, so that the bearing capacity of a pile foundation is improved, and the construction cost of the pile foundation is saved.

The present application relates to the design of flexural capacity of hybrid shear walls, which are assembled and cast-in-situ, and proposes a method and device for the sectional checking of the flexural capacity of slotted shear walls. The wall near the opening or vertical slot is divided into slot-controlled and non-slot-controlled zones along the wall height. In the slot-controlled zone, a three-stage stress evolution model of additional reinforcement is established by using a parametric bond-slip relationship at the new and old concrete interface. Then, the flexural capacity of the non-slot-controlled zone is superimposed to determine the plastic hinge length and overall ultimate bending moment. The design flexural capacity and the correction coefficient compared with the test peak value are obtained by numerical integration or simplified formula. The device modularizes the above method, which can automatically output the three-stage load curve and design value by inputting geometric and reinforcement parameters. It takes into account the interface bond degradation and overall bending response, and is suitable for the integration of design specification provisions and engineering software.

This invention relates to the field of building engineering technology, specifically to a method and application for assessing the bearing capacity of pile foundations. The method includes: collecting parameters of the variable cross-section pile; calculating the total vertical load G2 at the top of the pile based on the parameters; determining the total lateral stress F2 at the top of the pile, assuming the top of the pile is free and the bottom is fixed to the top of the pile cap; determining the total bending moment M2 at the top of the pile, assuming the pile cap only undergoes rigid rotation and horizontal displacement; and calculating the vertical bearing capacity N by combining G2, F2, and M2. i and horizontal bearing capacity R i ; N i R i Compare with the design value; if satisfied, proceed to the next step; otherwise, return to the first step. Change the load direction and repeat steps one through six. Take the maximum value N. max R max The analysis was completed using the predicted value of the most unfavorable working condition. This invention considers the influence of the backfill soil above the pile cap on the stress of the pile body, thus solving the problem in the prior art that the influence of the backfill soil above the pile cap was not calculated, resulting in inaccurate analysis of the stress state of the pile body.

The invention discloses a large-span space structure construction real-time deformation monitoring method and system, and the method comprises the following steps: 1, carrying out the arrangement of a multi-source sensor, and carrying out the data collection, a resistance strain gauge, a laser displacement sensor, a tilt angle sensor and an environmental parameter sensor are arranged at the key part with the stress exceeding 70% of a design value; 2, preprocessing the multi-source collected data: removing abnormal values from the original data by adopting a 3 sigma criterion, inputting the preprocessed data into a fusion module, and determining the weight according to the reciprocal of the variance of the measurement error of a sensor; 4, performing real-time deformation calculation and safety comparison: calling a preset structural mechanics simplified model; and step 5, grading early warning and data management. According to the invention, data is accurately collected, redundancy and missing are avoided, and the problems of coverage and timeliness are solved; the data quality is improved, and the interference and synchronization problems are solved; deformation risks are controlled, and construction safety is guaranteed.

The invention discloses a long-span bridge construction monitoring method which is applied to the technical field of construction control. Comprising the steps of obtaining sensor monitoring data of each bridge section in a current construction stage; preprocessing the monitoring data of the sensor; calculating the structural displacement and stress state of each bridge section under the action of self weight, prestress, concrete shrinkage and creep and temperature change according to the preprocessed data to obtain the structural displacement and stress state of each construction stage; according to the calculated structural displacement and stress state of each construction stage, determining the formwork erection elevation of the bridge structure of each construction stage through backward analysis; and correcting the difference value between the formwork erecting elevation and the predicted value, so as to monitor the construction of each bridge section. According to the construction monitoring method, internal force and displacement of each stage can be prevented from deviating from the design value along with the change of the concrete pouring process, the safety of the structure in the construction process is improved, the construction safety and quality are guaranteed, and the construction finished bridge state meets the design requirement.

The invention discloses a grid structure construction monitoring method, which comprises the following steps of: dividing typical working conditions according to a design drawing and a construction process, identifying key parts, planning deformation, stress and environment monitoring points, and setting a control threshold value; checking and installing monitoring equipment, namely arranging optical targets at key nodes, installing strain sensors on key rod pieces, and installing temperature sensors on the structure; the method comprises the following steps of: synchronously acquiring three-dimensional coordinate data of nodes, stress data of rod pieces and environment temperature data after each typical working condition is completed, when the environment temperature is obviously changed and in a key construction stage in close fit with the construction working condition; performing data processing, analysis and feedback: performing comparative analysis on the real-time data, a design value, a threshold value and historical data, generating a monitoring report or sending out graded early warning according to an analysis result, and guiding construction adjustment; and after the structure main body is completed, regular monitoring is continued until the structure deformation tends to be stable, a complete and standardized monitoring process is formed, and the operability is high.

The application discloses a reinforced concrete drainage pipe maximum actual covering depth analysis method, comprising the following steps: 1, calculating the bending moment standard value and the axial force standard value of point A, two side points C and the uppermost point B under the pipe section; 2, according to the actual engineering situation and the soil parameters, taking the pipe top covering depth H s as a variable, the internal force design value of the jacking construction method drainage pipe engineering state is calculated, and a function relationship formula is obtained, in which the pipe top covering depth H s is the independent variable, and the pipe internal force design value M' di and N' di are the dependent variables; 3, the function relationship formula is adjusted by adjusting H s , and the positive calculation is clamped and fitted; M' di and N' di are respectively close to the three-point method experimental crack load of the national standard I, II and III pipes, and the corresponding H s corresponding to the fitting calculation result is obtained in the engineering allowable error range. The application can improve the design efficiency, reduce the design errors, avoid the engineering accidents caused by the weak pipe material selection under the condition of ensuring the safety and quality, and fully exert the pipeline performance.