配置预应力钢棒的钢筋混凝土剪力墙抗震性能研究  

Study on seismic behavior of concrete shear walls reinforced by steel bars for prestressing of concrete

作　　者：张香成[1] 朱银胜 赵军[1] 沈富强 ZHANG Xiangcheng;ZHU Yinsheng;ZHAO Jun;SHEN Fuqiang(School of Mechanics and Safety Engineering,Zhengzhou University,Zhengzhou 450001,China;School of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学力学与安全工程学院,河南郑州450001 [2]郑州大学土木工程学院,河南郑州450001

出　　处：《建筑结构学报》2024年第1期117-127,共11页Journal of Building Structures

基　　金：国家自然科学基金项目(52278284);河南省重点研发与推广专项(2321023221001)。

摘　　要：为研究配置预应力钢棒混凝土剪力墙的抗震性能和自复位能力,对剪跨比均为2.0的1个钢筋混凝土剪力墙和2个暗柱配置光圆预应力钢棒的钢筋混凝土剪力墙进行低周反复加载试验,对比研究了3个剪力墙的破坏情况、滞回性能、骨架曲线、承载力退化、刚度退化、残余变形、裂缝宽度、耗能能力等。结果表明:与普通钢筋混凝土剪力墙相比,配置预应力钢棒能明显提高剪力墙的承载力,减轻混凝土破坏程度,降低刚度退化速率,以及减小最大裂缝宽度,但剪力墙的延性和耗能能力均有所降低;当位移角大于1.6%时,配置预应力钢棒剪力墙的残余变形和残余裂缝宽度相比于普通钢筋混凝土剪力墙的均明显减小,表明配置预应力钢棒的混凝土剪力墙的自复位能力较好,随着暗柱预应力钢棒的增加,剪力墙自复位能力也得到增强。采用ABAQUS有限元软件对3个剪力墙进行数值模拟,将模拟结果与试验结果进行对比,结果吻合较好,进而验证了数值模拟的有效性。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.

关 键 词：钢筋混凝土剪力墙 预应力钢棒 低周反复加载试验 抗震性能 自复位性能 

分 类 号：TU352.11[建筑科学—结构工程] TU317.1