自复位摩擦耗能铰支钢筋混凝土剪力墙的设计与性能研究  

Design and behavior of bottom hinged self-centering RC shear walls using self-centering friction devices

作　　者：王维[1] 李爱群[2,3] 王星星[1] WANG Wei;LI Aiqun;WANG Xingxing(School of Civil Engineering and Architecture,Jiangsu University of Science and Technology,Zhenjiang 212000,China;Beijing Advanced Innovation Center for Future Urban Design,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;School of Civil Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]江苏科技大学土木工程与建筑学院,江苏镇江212000 [2]北京建筑大学北京未来城市设计高精尖创新中心,北京100044 [3]东南大学土木工程学院,江苏南京211189

出　　处：《建筑结构学报》2025年第4期29-43,共15页Journal of Building Structures

基　　金：国家重点研发计划(2017YFC0703600);国家自然科学基金项目(51708257,51708258)。

摘　　要：为了提升既有钢筋混凝土剪力墙(RC墙)的自复位和耗能性能,采用自复位摩擦耗能技术对其进行改造,形成自复位摩擦耗能铰支钢筋混凝土剪力墙(SCF-RC墙)。在介绍SCF-RC墙的构造细节、工作机理和设计方法的基础上,采用OpenSees软件建立SCF-RC墙的有限元模型,研究SCF-RC墙在低周往复加载下的力学行为,验证SCF-RC墙构造方案的可行性和设计方法的有效性。并进一步对SCF-RC墙进行参数分析,从承载力、刚度、自复位和耗能能力等方面进行评估。研究结果表明:SCF-RC墙的构造方案能够有效提升既有RC墙的自复位和耗能性能,提出的设计方法能够有效对SCF-RC墙进行设计;在低周往复加载下,SCF-RC墙的力-位移滞回曲线为旗帜形,且其具有与既有RC墙相似的强度特征;当自复位摩擦装置的滑动摩擦系数为定值时,随着自复位摩擦装置内板凸键角度的增加,SCF-RC墙的力矩贡献比先增加后减小,其等效黏滞阻尼比先减小后增加;当自复位摩擦装置的内板凸键角度为定值时,随着自复位摩擦装置滑动摩擦系数的增加,SCF-RC墙的力矩贡献比变化不大,其等效黏滞阻尼比逐渐增加;随着加载位移幅值的增加,SCF-RC墙的等效黏滞阻尼比逐渐减小。Self-centering friction energy dissipation technology was adopted in the existing reinforced concrete(RC)shear walls to enhance their self-centering and energy dissipation performance,and novel bottom hinged self-centering friction energy dissipation reinforced concrete shear walls(SCF-RC walls)were produced.The construction specifications,working mechanism and design method of the SCF-RC walls were firstly introduced.Subsequently,finite element models of the SCF-RC walls were established utilizing OpenSees software to investigate their mechanical behavior under cyclic loadings.The feasibility of construction specifications and the effectiveness of design method of SCF-RC walls were verified.Parametric analyses were then conducted on SCF-RC walls to evaluate their bearing capacity,stiffness,self-centering performance and energy dissipation performance.The results show that the proposed construction specifications for SCF-RC walls effectively enhance the self-centering and energy dissipation performance of the existing RC walls.Additionally,the proposed design method is effective in the design of SCF-RC walls.Under cyclic loadings,the SCF-RC wall exhibits strength characteristics similar to that of the existing RC wall,with flag-shaped force-displacement hysteresis curves.When the sliding friction coefficients of SCF devices are identified,and along with an increase in the convex key angle,the moment contribution ratio of the SCF-RC wall initially increases and then decreases,while its equivalent viscous damping ratio initially decreases and then increases.When the convex key angles of SCF devices are identified,the increase of sliding friction coefficient minimally affects the moment contribution ratio of SCF-RC wall,while its equivalent viscous damping ratio gradually increases.Moreover,as the peak loading displacement increases,the equivalent viscous damping ratios of the SCF-RC walls gradually decrease.

关 键 词：钢筋混凝土剪力墙 自复位 摩擦耗能 抗震性能 设计方法 

分 类 号：TU352[建筑科学—结构工程]