CN-122020813-A - Engineering structure design method, medium and equipment for ECC-concrete composite beam

CN122020813ACN 122020813 ACN122020813 ACN 122020813ACN-122020813-A

Abstract

The invention relates to the technical field of building design, in particular to an engineering structure design method, medium and equipment of an ECC-concrete composite beam, comprising the following steps of constructing and integrating a special database; the intelligent prediction model is built, a distributed gradient lifting library subjected to system evaluation optimization and a classification characteristic enhancement agent model are deployed in a model layer, the model layer is composed of three modules which work cooperatively, namely a generator, an evaluator and an optimizer, the automatic generation of a combined beam structure scheme, the automatic optimization and evaluation of material proportions, the mechanical response prediction and damage interval division, and the output results of the model layer, namely the optimal structure scheme and the damage monitoring interval based on a bending moment-deflection curve are determined. The invention solves the problem of unbalanced performance and cost caused by single objective optimization in the traditional design, and realizes the cooperative optimization of the ECC material proportion and the composite beam structural design.

Inventors

LIU ZHICHEN
YANG ZHENGWEI
HU SHIJUN
DENG DEPING
ZHANG NAN
SONG YIMING
WANG CHUNPING
SONG YINGLONG
FENG CHAOWEN
FAN YAFANG
PENG PENG

Assignees

中国能源建设集团湖南省电力设计院有限公司

Dates

Publication Date: 20260512
Application Date: 20260410

Claims (10)

1. The engineering structure design method of the ECC-concrete composite beam is characterized by comprising the following steps of: s1, constructing and integrating a special database; s2, constructing an intelligent prediction model, wherein a model layer is provided with a distributed gradient lifting library subjected to system evaluation optimization and a classification characteristic enhancement agent model, and the model layer is composed of three modules which work together by a generator, an evaluator and an optimizer; S3, automatically generating a combined beam structure scheme, namely automatically exploring a design space by a generator based on a bearing capacity lifting target and a structure constraint input by a user, and generating a plurality of groups of candidate ECC structure schemes; S4, autonomous optimizing and evaluating the material proportion, namely, taking the material performance parameter output by the ECC structural scheme obtained in the step S3 as a target, automatically starting a multi-target optimizing process by an optimizer, and generating a pareto standard optimal proportion solution set under the constraint of a special database; S5, mechanical response prediction and damage interval division, namely automatically predicting yield bearing capacity, peak bearing capacity and corresponding deflection of the combined beam based on the structural parameters determined by the ECC structural scheme obtained in the step S3; And S6, outputting results at an application layer, namely outputting an optimal ECC material mixing ratio and structural design parameters of the composite beam according to a globally optimal material design scheme and a damage interval, determining an optimal structural scheme and a damage monitoring interval based on a bending moment-deflection curve.
2. The method for engineering structural design of an ECC-concrete composite beam according to claim 1, wherein the dedicated database includes an ECC-concrete composite Liang Shuju library, an ECC-concrete composite Liang Shuju library, twelve sets of input variables, and five structural response indicators; twelve groups of input variables are respectively beam section height, beam section width, beam span, distance from a concentrated force acting point to a beam support, beam upper longitudinal reinforcement ratio, beam lower reinforcement ratio, stirrup diameter, stirrup spacing, beam bottom ECC layer thickness, ECC tensile strength, ECC tensile strain and ECC compressive strength; The five structural response indexes are respectively the initial rigidity, the yield strength, the deflection corresponding to the yield strength, the peak strength and the deflection corresponding to the peak strength of the ECC-concrete composite beam.
3. The engineering structural design method of an ECC-concrete composite beam according to claim 1, wherein S2 specifically includes: S201, a generator receives constraint conditions input by a user, automatically samples in a design space and generates an initial candidate scheme set; s202, an evaluator calls a proxy model of a model layer in real time, predicts each candidate scheme produced by a generator in batches, feeds back a fitness value, and provides a quantization basis for optimization iteration; And S203, an optimizer is built in a multi-objective optimization algorithm, takes maximized structural performance and minimized material cost as double objectives, drives a scheme to evolve, automatically screens non-dominant solutions according to the fitness value fed back by the evaluator in each generation of iteration, and guides the search direction to converge towards the pareto standard front edge.
4. The method for engineering structural design of an ECC-concrete composite beam according to claim 3, wherein the distributed gradient lifting library optimized in S2 and the classification feature enhancement agent model are both randomly searched and fourier optimized super-parametric optimized.
5. The method for engineering structural design of an ECC-concrete composite beam according to claim 4, wherein the super parameters in the distributed gradient hoisting library optimized in S2 are ：n_estimators=600, max_depth=3, learning_rate=0.16,booster='gbtree',gamma=0.5,reg_alpha=0.1, reg_lambda=0,min_child_weight=3, subsample=0.9, colsample_bytree=0.8,random_state=200; classification feature enhanced super parameters are ：iterations=400, depth=3, learning_rate=0.1,loss_function ='Poisson',od_type='IncToDec',od_ _wait=50.
6. The engineering structure design method of the ECC-concrete composite beam according to claim 3, wherein the multi-objective optimization algorithm in the S203 is a multi-objective optimization method based on a multi-objective particle swarm optimization algorithm, the multi-objective optimization algorithm aims at maximizing ECC compressive strength, maximizing ECC tensile strength and minimizing material cost, constraint conditions limit ECC raw material total quality and aggregate doping amount parameters, and a group of pareto standard optimal solution sets is generated according to target tensile strength and tensile strain requirements.
7. The method of engineering a composite beam of ECC-concrete according to claim 1, wherein the ECC structural schemes include different ECC layer thicknesses, tensile strength of the ECC, tensile strain of the ECC, and compressive strength of the ECC.
8. The method for engineering structural design of an ECC-concrete composite beam according to claim 7, wherein the optimal structural solution utilizes the resulting ECC mix cost With the thickness of ECC layer And calculating the performance index of the ECC concrete composite beam, wherein the expression is as follows: ; Wherein, the And The width and the length of the combined beam are respectively, Is a performance index; The smaller the number, the better the corresponding design.
9. A readable storage medium, characterized in that it stores a computer program adapted to be loaded by a processor and to perform the method of engineering construction design of an ECC-concrete composite girder according to any one of claims 1-8.
10. A computer device, characterized in that it comprises a memory and a processor, said memory storing a computer program which, when executed by said processor, runs the method of engineering a composite beam of ECC-concrete according to any one of claims 1-8.

Description

Engineering structure design method, medium and equipment for ECC-concrete composite beam Technical Field The invention relates to the technical field of building design, in particular to an engineering structure design method, medium and equipment of an ECC-concrete composite beam. Background Key structures such as a main thermal power plant, a boiler foundation, a cooling tower and the like are in a severe environment of high temperature, vibration, corrosion and heavy load coupling for a long time, and a new energy power station also faces the service requirements of large deformation, high durability and long service life. Both types of electrical structures place higher standards on the load-bearing capacity, ductility, crack resistance and durability of the concrete member. The traditional concrete has low tensile strength, large brittleness and easy cracking, is easy to generate through cracks under alternating load and extreme environment, causes corrosion, rigidity degradation and durability attenuation of the steel bars, and is difficult to meet the long-term safe operation of a thermal power structure and the full life cycle service requirement of a new energy structure. The existing mix proportion design depends on experience or single target optimization, so that strength, deformation and cost are difficult to be considered, structural design and material selection are disjointed, and cooperative optimization of performance and economy cannot be realized. High-ductility concrete (ECC) provides a new material path for the upgrade of electrical engineering structures by virtue of strain hardening, multi-joint cracking, high ductility and high corrosion resistance. However, the existing ECC preparation and application has obvious short plates, wherein the proportion depends on trial preparation, the target is single, and the actual stress and service scene of the power structure are not combined. The intelligent design and performance-cost integrated evaluation method for fusion of scenes of thermal power, new energy and the like is lacking, and the structure and material depth fusion is insufficient, so that the large-scale application of the method in power engineering is limited. Disclosure of Invention The invention mainly aims to provide an engineering structure design method, medium and equipment of an ECC-concrete composite beam, and aims to solve the technical problems that the existing ECC is dependent on trial formulation, single in target, not combined with actual stress and service scene of an electric power structure and insufficient in deep fusion of the structure and materials. In order to achieve the above purpose, the engineering structure design method of the ECC-concrete composite beam provided by the invention comprises the following steps: s1, constructing and integrating a special database; s2, constructing an intelligent prediction model, wherein a model layer is provided with a distributed gradient lifting library subjected to system evaluation optimization and a classification characteristic enhancement agent model, and the model layer is composed of three modules which work together by a generator, an evaluator and an optimizer; S3, automatically generating a combined beam structure scheme, namely automatically exploring a design space by a generator based on a bearing capacity lifting target and a structure constraint input by a user, and generating a plurality of groups of candidate ECC structure schemes; S4, autonomous optimizing and evaluating the material proportion, namely, taking the material performance parameter output by the ECC structural scheme obtained in the step S3 as a target, automatically starting a multi-target optimizing process by an optimizer, and generating a pareto standard optimal proportion solution set under the constraint of a special database; S5, mechanical response prediction and damage interval division, namely automatically predicting yield bearing capacity, peak bearing capacity and corresponding deflection of the combined beam based on the structural parameters determined by the ECC structural scheme obtained in the step S3; And S6, outputting results at an application layer, namely outputting an optimal ECC material mixing ratio and structural design parameters of the composite beam according to a globally optimal material design scheme and a damage interval, determining an optimal structural scheme and a damage monitoring interval based on a bending moment-deflection curve. The engineering structure design method of the ECC-concrete composite beam is further improved in that a special database comprises an ECC-concrete composite Liang Shuju library, an ECC-concrete composite Liang Shuju library, twelve groups of input variables and five structural response indexes; twelve groups of input variables are respectively beam section height, beam section width, beam span, distance from a concentrated force acting point to a beam support, beam