Seismic Behavior Analysis Of L-shaped Double Steel Plate Composite Shear Wall With H-shaped Stell At The End

Composite shear wall with double steel plates and infilling concrete can make full use of the properties of concrete and steel,has the advantages of high bearing capacity,good ductility and so on,and has been used more and more in high-rise and super high-rise buildings.Through literature review and investigation,it is found that previous studies focus on the analysis of double steel plate concrete composite shear walls with the cross section or T-shaped sections.However,in practical engineering,there are often asymmetric cross-section forces,such as high-rise shear walls in the internal and external wall junction,wall corner,internal wall junction,etc.are used in the special-shaped cross-section double steel plate concrete composite shear wall.L-shaped double steel plate concrete shear wall is a typical structure with asymmetric section.The shear center of the section does not coincide with the centroids,which make it suffer complex forces.However,there are few articles about the seismic performance of L-shaped section double steel plate concrete shear wall.Therefore,in this paper,the L-shaped section double steel plate concrete composite shear wall was tested and analyzed,and the finite element software ABAQUS was used for numerical analysis.The main research work is as follows:(1)Five L-shaped composite shear wall specimens with double steel sheets and concrete were designed and manufactured,and they were tested under low cyclic loading.The size and number of different H-beams at the end of web were compared and studied.The influence of different parameters of the number and size of H-shaped steel at the end of web on the failure mode,bearing capacity and energy dissipation capacity of the shear wall and the data results were obtained.The key indexes for evaluating the seismic performance of the composite shear wall specimens were obtained by analyzing the test data.(2)On the basis of the test,by selecting the constitutive relation suitable for this test,relevant parameters of ABAQUS were set according to the actual test.Based on the ABAQUS finite element simulation software,all the relevant components of this test were numerically analyzed,and the numerical simulation results were compared with the actual test results to verify the rationality of the finite element modeling.(3)On the basis of verifying the accuracy of finite element modeling method and simulation results,the main parameters of L-shaped section double-steel plate concrete composite shear wall were selected for analysis.The main parameters studied were shear span ratio,axial compression ratio,the number of H-shaped steel at the end of the web and the size of H-shaped steel.The influences of different parameters on the bearing capacity,initial stiffness,ductility coefficient and other seismic performance parameters of double-layer steel plate composite shear wall members filled with concrete are studied,a series of regular conclusions are obtained,and design suggestions were given.(4)Finally,based on the theory of full plastic method,The calculation formula of normal section flexural capacity of double steel plate composite shear wall with Hbeam at the end of L-shaped section webs is deduced and proposed.The maximum error between theoretical calculation value and experimental result is 10%.This calculation formula provides theoretical basis for such shear wall.