Research On Numerical Simulation Of Earthquake-resistant Behaviors Of Shear Wall

One of the main components in the high-rise building structures is reinforced concrete shear wall structure, which is a kind of component widely used in building construction to resist lateral force.As the development of the construction technology and materials, high-rise building structures have a rapid growth in the last decades. Facing earthquake, some of them perform well in seismic-resistant behaviors, but some structures are damaged relatively serious So the damage mechanism of earthquake still needs to be researched further.Although the test results is intuitive and reliable, the numerical simulation method is paid the attention of scholars, due to experimental high cost, long cycle, and complex condit ion. With the development of computer technology, some large-scale general software has been increasingly used in the study of nonlinear performance of the shear wall structure and attained fruitful achievement, such as ABAQUSand SAP2000.Shear wall structure is mainly composed of steel and concrete, but the two materials have essential differences in mechanical properties. In the process of analysis, besides the mechanical characteristics, the plastic damage fracture behavior of concrete material and the bonding performance between steel and concrete interface are to be considered. The code of ABAQUS was employed in this paper to conduct the numerical simulation of reinforced concrete shear wall under low reversed cyclic loading, which considered the concrete plastic damage factor and analyzed two kinds of constitutive relation of steel, ideal elastic-plastic and elastic-enhancing model. The research results have shown that the established finite element model is feasible, and the simulation data by double broken line model match well with experimental values.In order to determine the deformation index of reinforced concrete shear wall, this paper considered axial compression ratio,height to width ratio and stirrup characteristic value that is the main factor of influencing the deformation of shear walls, and then put forward a calculation model. According to this model, the deformation indicesof 6 reinforced concrete shear walls were obtained. Comparing the calculated value and experimental value with the numerical simulation, gotten that:about vertex limit displacement of shear wall components, the calculated values, the test values and the numerical simulation values are very close, which verified that the calculation model is feasibility and validity.