Optimization Design Of Steel Plate Shear Wall With Slits Based On Adaptive Genetic Algorithm

Steel plate shear wall with slits（SPWS）changes the force mode of shear wall by opening vertical joints on the embedded steel plate.SPWS can adjust the stiffness by changing the opening parameters,and the ductility can be greatly increased at the expense of a certain stiffness.At present,most of the researches on SPWS are performance analysis and lateral stiffness theory.Based on the characteristics of SPWS,it is necessary to optimize the ductility under the condition of certain lateral stiffness.Therefore,based on the improved adaptive genetic algorithm combined with ABAQUS finite element software,this thesis optimized the design of SPWS.The main contents are as follows:Firstly,The current research on SPWS is introduced and the characteristics of SPWS are summarized.The principle,steps and improvement of genetic algorithm are introduced in detail,and different test functions are selected to verify the feasibility of the improved algorithm.The ABAQUS finite element modeling method and its verification are described,and the program implementation method for the interaction between PYTHON script of adaptive genetic algorithm and ABAQUS finite element software is given.Secondly,The finite element software ABAQUS was used to conduct finite element modeling analysis on the slit steel plate with different slit parameters,explore the influence of different parameters on the performance,determine the optimization parameters,and discuss the optimization strategy.The results show that the width-width ratio l/b and width-thickness ratio b/t are the main parameters that affect the ductility of slit steel plates.The larger the width-width ratio is,the better the ductility is,the less the stiffness is,and the smaller the width-width ratio is,the better the stiffness is.Two optimization strategies are given through the trial optimization results.Furthermore,The ductility performance of different section frames,different aspect ratio frames and different plate thickness optimization models were optimized by using PYTHON script of adaptive genetic algorithm and ABAQUS finite element software under two sides connection and four sides connection respectively.The results show that the SPWS should be connected on both sides and thin plate should be adopted.The proportion of lateral stiffness bearing of slit steel plate should be increased when small aspect ratio and large section frame are adopted.Finally,The optimized model was analyzed under monotone loading and cyclic loading,and compared with steel plate.The results show that the ductility of the SPWS is 2-3 times that of the steel plate shear wall,and the energy consumption of the SPWS is more than 2times that of the steel plate shear wall.The SPWS has excellent ductility and large ultimate displacement,and is an excellent seismic component.Meanwhile,the optimization method and program of this thesis are reliable.