Nonlinear FEM Numerical Simulation And Experimental Study On A New Type Of Composite Low-Rise Shear Wall

In general, the shear wall whose shear-span ratio less than1is called low-riseshear wall, and they usually used in the multi-storey shear wall structures with frameat the bottom and the high-rise structures with large space at lower part. Researchshows that the failure of the low-rise shear wall is brittle, and caught off guard thebuildings will be destroyed even integral collapse once it happened. According to theseismic fortification principle of “No Damage with Frequently Occurred Earthquakes,Repairable with Fortification Intensity Earthquakes and No Collapse with RareOccurred Earthquakes”, it is very necessary to take steps to improve their seismicbehavior when the low-rise shear walls used as primary anti-lateral force componentsin the structures with large space at lower part. A low-rise RC shear wall with steelplate and concealed bracings is presented used for anti-lateral force components ofhigh-rise buildings by the research group, based on the research of the former scholars.The performance of the low-rise RC shear wall with steel plate and concealedbracings is analyzed with the methods of both experimental research and nonlinearFEM numerical simulation in this paper, and the prospect of the new type ofcomposite components used in practical project is preliminary established.Two specimens about the low-rise RC shear wall with concealed bracings and thelow-rise RC shear wall with steel plate and concealed bracings are tested underreciprocating load by the research group, their bearing capacity, hysteresis property,ductility and failure phenomena under reciprocating load are investigated, and theexcellent performance about the low-rise RC shear wall with steel plate and concealedbracings is revealed while comparing the test results. Based on the experimental studyand the simplified calculation and analysis, a nonlinear FEM numerical model aboutthe new type of composite low-rise RC shear wall is established by further usingABAQUS program, and the rationalization about it is discussed by changing thefactors of reinforcement arrangement, steel plate size and so on. Through thecomparison and analysis, this paper demonstrates that the low-rise RC shear wall withsteel plate and concealed bracings has a high bearing capacity and a good ability ofdeformation, and it is one kind of structural element worthed recommending toengineering.Finally, the calculation formula for the low-rise RC shear wall with steel plate and concealed bracings is derived by using superposition principle, and somesuggestions about how to reasonably select the relevant parameters and the designsteps are presented based on the results of finite element analyses.