暗柱配置1000 MPa级高强钢筋混凝土剪力墙抗震性能研究

STUDY OF SEISMIC PERFORMANCE OF RC SHEAR WALL WITH 1000 MPa HIGH-STRENGTH REBARS

通过对4片剪跨比为2.43的钢筋混凝土剪力墙试件进行低周反复加载试验,研究1 000 MPa级高强钢筋用于剪力墙边缘约束暗柱时的抗弯承载力、延性、耗能能力及破坏特征。结果表明:与普通钢筋混凝土剪力墙相比,边缘约束暗柱内配置高强钢筋的剪力墙抗弯承载力提高,屈服位移和极限位移也有较大提高。在试验基础上提出了考虑暗柱高强钢筋的混凝土剪力墙水平承载力计算式,计算值与试验值吻合较好。

Experimental studies on four shear wall specimens under low-cyclic reversed loading were carried out,in which high-strength rebar with the yield strength of 1 000 MPa were used in boundary embedded columns of reinforced concrete shear walls. The bending bearing capacity,ductility,energy dissipation capacity and the failure characteristics of high-rise shear wall with high-strength rebar were researched. The results showed that compared to RC shear wall with normal-strength steel,the bending bearing capacity of specimens with high-strength steel used as longitudinal reinforcement in boundary concealed columns was increased,and the yield and ultimate displacement were improved greatly. Finally,the calculation formula of horizontal bearing capacity of high-strength reinforced concrete shear wall with concealed column was given. The analysis results showed that the calculated values were in good consistent with the experimental data.