Numerical Simulation on Seismic Performance of SRC Short-leg Shear Walls with Pre-stressed Composite Diagonal Bracing

Using the finite element software DIANA, a numerical model was calibrated by comparing the hysteresis curve, the skeleton curve, the principal strain profile of the concrete afterpre-stressed and cracking mode at peak load stage of test result, respectively. This calibrated model is used for the farther parametric analysis, which contains axial load ratio, shear span ratio and diagonal bracing form, on the seismic performance of SRC short-leg shear walls with pre-stressed composite diagonal bracing. The research results indicated that the X-shaped pre-stressed composite diagonal bracing can ensure better seismic performance of SRC short-leg shear walls. With the increase of shear span ratio, the initial stiffness and bearing capacity of the specimen decrease, and the ultimate deformation capacity increases. Increasing the pre-stressed value will significantly increase the lateral stiffness, but cause the bearing capacity of the specimen to decrease slightly, and the pre-stressed value is suggested to be controlled around 0.6 times of yield strength of pre-stressed reinforcement. X-shaped and A-shaped bracing have little effect on the initial stiffness and peak load, but have obvious influence on ductility. X-shaped bracing are better than A-shaped bracing in low walls, but it was contrary in middle-high and high walls. © 2021, The Editorial Board of Journal of Basic Science and Engineering. All right reserved.