钢筋混凝土框架-剪力墙结构基于能量抗震设计方法的耗能机制控制  

Study on energy dissipation mechanism control in energy-based seismic design method of reinforced concrete frame-shear-wall structure

作　　者：缪志伟[1] 叶列平[2] 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096 [2]清华大学土木工程安全与耐久教育部重点实验室,北京100084

出　　处：《建筑结构学报》2014年第1期1-9,共9页Journal of Building Structures

基　　金：国家自然科学基金项目(51008078;51378299);江苏省高校优势学科建设工程项目

摘　　要：对结构进行合理的耗能机制控制是实现其基于能量抗震设计的前提。根据我国现行规范设计了多个不同参数的钢筋混凝土框架-剪力墙结构算例,并利用多条强震记录进行弹塑性时程分析,定量研究联肢剪力墙整体系数α、剪力墙截面轴向变形影响系数T Z、框架-剪力结构刚度特征值λ等3个参数对其耗能机制的影响,结果表明:对于一定的T Z,需控制α不超过相应的界限值才能使钢筋混凝土框架-剪力墙结构形成"强墙肢弱连梁"的合理耗能机制,而λ的变化不会改变结构耗能机制类型。在此基础上提出了由联肢剪力墙整体系数α和截面轴向变形影响系数T Z表达的钢筋混凝土框架-剪力墙结构耗能机制控制的具体设计条件,并通过水平分缝连梁的算例验证了该控制条件的有效性。Making structures have reasonable energy dissipation mechanism is the precondition and basis for the implementation of energy-based seismic design method. A large number of reinforced concrete frame-shear-wall structures were designed according to the current codes and then analyzed by nonlinear time-history analytical method under a series of earthquake acceleration records. Then relations between the structural energy dissipation mechanism and the structural parameters α , Tz and A , which describe the relative stiffness of coupling beam to wall pier in the shear wall, the relative size of the opening in the section of shear wall and the relative numbers of frame to shear wall in the whole structure respectively, were quantitatively analyzed. The results show that the ＇ strong wall pier-weak coupling beam＇ mechanism, which is the reasonable energy dissipation mechanism for reinforced concrete frame-shear-wall structures, can he realized only when the value of parameter α does not exceed some limit value with a given value of Tz . Finally, the design condition governing the energy dissipation mechanism of reinforced concrete frame-shear-wall structures was concluded and validated by a numerical example.

关 键 词：钢筋混凝土框架-剪力墙结构 强墙肢弱连梁 基于能量抗震设计 有限元分析 耗能机制控制 

分 类 号：TU973.16[建筑科学—结构工程] TU973.31