Study on seismic behavior of concrete shear walls reinforced by steel bars for prestressing of concrete
In order to study the seismic performance and self-resetting ability of RC shear walls with steel bars for the prestressing of concrete(PC steel bars),taking all specimens have a shear span ratio of 2.0,a RC shear wall and two RC shear walls with plain PC steel bars in embedded columns were studied based on the testing under low-reversed cyclic load.The failure condition,hysteresis performance,skeleton curve,bearing capacity degradation,stiffness degradation,residual deformation,crack width and energy dissipation capacity of three shear wall specimens were compared and studied in the experiment.Experimental results showed that compared with ordinary reinforced concrete shear walls,shear walls reinforced with PC steel bars can significantly improve the bearing capacity of shear walls,reduce the failure degree of shear walls,reduce the rate of stiffness degradation,and decrease the maximum crack width,but the ductility and energy dissipation capacity of shear walls are reduced.When the drift ratio is larger than 1.6％,the residual deformation and residual crack width of PC steel bar reinforced shear walls are significantly reduced compared with the ordinary reinforced shear wall,indicating that the self-resetting ability of concrete shear walls reinforced with PC steel bars is better.With the increase of PC steel bars,the self-resetting ability of shear walls is also enhanced.The finite element software ABAQUS was used to numerically simulate the model of three specimens,and the simulation results were compared with the test results,and the results were in good agreement,which can verify the reliability of the low-reversed cyclic loading test and the feasibility of the numerical simulation.
国家科技期刊平台
NSTL
万方数据
维普
