| With the development of high-rise building, building earthquake performance requirements are high, and shear walls play an important role in the lateral force resisting system. In order to increase the general resistance to lateral shear capacity of the beam is placed in the concrete wall, forming excellent seismic performance of steel-concrete shear wall (SRCW). Currently SRCW structure in the country is gradually widely used.Consider the different forms of steel (ie beams, channels and angles) as parameters, the four steel reinforced concrete shear walls Experimental Research (shear span ratio=1.75) in. By cyclic loading test to obtain the variation of each specimen failure modes and hysteresis curves. And then get each specimen variation skeleton curves, ductility, energy dissipation capacity and strength degradation. Analysis of bending and shear deformation, and the deformation in each of its different proportion compared different displacement displacement when each specimen.Test results by:SRCW and general shear failure mode are basically the same, all belong to cyclic shear, plus the development of shear cracks in steel support more slowly. Load yield displacement with shear walls and steel stays dark when the damage displacement have increased significantly improved ductility. Its yield load and ultimate load than ordinary shear wall has improved, particularly the rate of increase ultimate load is large, so the X-shaped steel support concealed presence can effectively improve the bearing capacity of shear walls, fully improved shear mechanical properties of the wall.To establish a reasonable abaqus software finite element model of digital simulation, test results and simulation results of a comparative analysis, numerical simulation skeleton curve and a high degree of fit test, and further clarify the failure mode and failure mechanism of reinforced concrete shear walls. Provide theoretical support for the follow-up of steel reinforced concrete shear wall engineering design. |
