Research On Optimal Design Of Trapezoidal Corrugated Steel Plate Shear Walls With Four Edges Connection

Because of its excellent elastic initial stiffness,plastic performance,ductility,hysteresis characteristics,steel plate shear wall（SPSW）has been widely used in high-rise and super high-rise buildings in earthquake-prone areas as an excellent lateral force resistance system.However,the traditional SPSW has some problems,such as serious stiffness degradation,premature buckling of steel plate and buckling noise,frame and steel plate can not be installed at the same time,affecting the construction period.Based on this,CSPSW（corrugated steel plate shear wall）is proposed as a new type of steel plate shear wall.Scholars from various countries hope to use the unique "organ effect" of corrugated steel plate to solve the shortcomings of traditional SPSW.CSPSW,as a kind of new structure form of nearly twenty years to appear,both at home and abroad for its research has just started,the vast majority of research is still in the parameter analysis and simple enumeration method relatively shallow areas,such as the lack of the CSPSW structure as a whole system optimization computing research.This article will be based on the previous research,through the Python programming language good interaction with ABAQUS,the realization of the FEM of the automatic establishment and the efficient operation of genetic optimization algorithm,combined to explore the different parameters and the effect on the performance of corrugated steel shear wall,and studied the optimization process of the CSPSW and its optimized performance.The main work completed is as follows:（1）Through monotone loading analysis,the influence of different parameters on the lateral resistance of CSPSW and the influence degree are summarized.The results show that the existence of initial defects,the height-thickness ratio and width-height ratio of CSPSW have significant effects on the lateral resistance.The ripple ratio and ripple quantity of corrugated steel plate have certain influence on the lateral resistance of CSPSW.The size of initial defects has little effect on the lateral resistance of corrugated steel shear walls.（2）By introducing the elite retention strategy,the standard genetic optimization algorithm is improved and an improved genetic optimization algorithm is established.The feasibility and superiority of the improved GA and the effectiveness of the optimization of CSPSW structure are discussed and verified by using a CSPSW model.（3）Using the improved genetic optimization algorithm,explores the CSPSW under the optimization process of evolution,the results show that in ALLPD corresponding structural displacement is not equal to zero as the objective function,the different aspect ratio the evolvement of the CSPSW are similar,tend to form a short wave trough,the takanami is high,the thickness of corrugated steel plate structure.（4）The pseudo-static numerical simulation test of the optimized CSPSW was carried out.The research shows that when the width to height ratio is less than 1,the energy dissipation capacity,buckling load and bearing capacity of the SPSW structure system can be effectively improved by using corrugated steel plate instead of flat steel plate as the form of embedded steel plate.Meanwhile,the stiffness degradation and the "pinching phenomenon" of the structure can be greatly improved.When the aspect ratio is ≥ 1,the CSPSW can still improve the buckling load and stiffness degradation,but has little influence on the energy dissipation capacity,bearing capacity and other properties.