ABSTRACT
In this study, three corner structure optimization schemes were designed for the shear wall of the modular steel-concrete combination, including modified chamfer (MACSW-J), modified chamfer stiffened (MACSW-Z), and modified rounded stiffened (MACSW-Y). The quasi-static tests of the three optimized shear walls and ordinary shear walls (MACSW) were compared and analyzed, including the determination of the damage degree and mechanical performance indicators of the specimens. Based on the collected test results, a numerical model is established. The influence of parameters is studied from the aspects of different length-span ratios, rib thickness ratios and plate thickness ratios. The results show that after the corner structure is optimized, the damage development of the specimen is significantly reduced, and the MACSW-Y is remarkable. Compared with the MACSW specimen, the ultimate bearing capacity of MACSW-Y increased by 34.19%, and the initial stiffness increased by 30.31%. Parameter analysis shows that the optimal values of the length-span ratio, rib thickness ratio and plate thickness ratio are 0.2, 1.8 and 3.0, respectively. The research reveals that the designed corner structure optimization scheme effectively delays the premature severe local damage at the corner of the shear wall, which leads to the loss of its bearing capacity, thereby ensuring the continuation of the overall mechanical properties of the specimen material.15
