具有复位功能的钢筋混凝土剪力墙设计与性能研究

DESIGN AND BEHAVIOR STUDY ON REINFORCED CONCRETE SHEAR WALLS WITH SELF-CENTERING CAPABILITY

为减轻混凝土剪力墙墙脚处的严重破坏,提高混凝土结构延性并控制震后残余变形,提出一种具有复位功能的钢筋混凝土剪力墙。该自复位剪力墙(SC-SW)通过两侧墙脚设置的碟簧装置提供复位力,利用墙体自身变形耗散地震能量。基于相同的几何尺寸和配筋以及相似的加载规则,建立普通钢筋混凝土剪力墙SW1和自复位剪力墙SC-SW有限元模型,对比分析两者的承载能力,耗能能力及变形能力。结果表明,SC-SW的承载能力略高于SW1,累积滞回耗能大于SW1,并且SC-SW的延性性能相比SW1提高约40.95%。新型SC-SW墙脚处放置碟簧装置可提供必要的抗侧刚度减轻墙脚的破坏,并提供较好的复位能力,能基本消除构件的残余变形,使结构在地震后具有可恢复的功能。

An innovative reinforced concrete shear wall with self-centering capability,which can reduce serious damage at the foot parts of the wall and improve the ductility capacity and control the residual deformation of structures during earthquakes,was developed in this study.The self-centering force of the self-centering shear wall(SC-SW)was provided by the combination disc spring device installed at both sides of the wall,and the seismic energy was dissipated by the deformation of the wall.The finite element models of SC-SW and the general reinforced concrete shear wall SW1 were establilished based on the same geometric dimensions and reinforcement,as well as the similar loading rules.The bearing capacity,energy dissipation and deformation capabilities were compared between the two models.Results indicated that the innovative SC-SW exhibited better energy dissipation capability and bearing capacity,and the ductility capacity of SC-SW was increased by 40.95%compared with SW1.The innovative SC-SW with disc spring device can also provide the necessary lateral stiffness and the restoring force to reduce serious damage at the foot parts of the wall and even eliminate the residual deformation of components,so that the structure has a recoverable function after the earthquakes.