连梁中安装SMA阻尼器框剪结构非线性分析  

Nonlinear analysis of reinforced concrete frame-shear wall structure with shape memory alloy dampers in coupling beams

作　　者：毛晨曦[1] 张予斌 李波[1] 王振营[2] 李惠[2] 欧进萍[2,3] 

机构地区：[1]中国地震局工程力学研究所,哈尔滨150080 [2]哈尔滨工业大学土木工程学院,哈尔滨150090 [3]大连理工大学土木水利学院,辽宁大连116024

出　　处：《哈尔滨工业大学学报》2013年第12期70-77,共8页Journal of Harbin Institute of Technology

基　　金：国家自然科学基金(91315301);地震行业科研专项资助项目(201308003);中国地震局工程力学研究所基本科研基金(2009-A01)

摘　　要：为改善钢筋混凝土框架-剪力墙结构中小跨高比连梁的脆性破坏模式,提出在连梁中安装形状记忆合金(shape memory alloy,简称SMA)阻尼器,并采用数值分析对此类结构的抗震性能进行研究.以一幢阻尼器控制的18层平面框剪结构为例,对该结构进行Pushover分析及静力往复荷载作用下的非线性分析,研究了安装SMA阻尼器的连梁的两个设计参数(屈服力比和屈服位移比)取值对整体结构非线性性能的影响.分析结果表明:屈服力比对结构损伤模式影响显著,当屈服位移比相同时,屈服力比越小,阻尼器进入屈服越早,变形集中在阻尼器中,结构自复位能力越强;屈服力比相同时,随着屈服位移比增大,连梁中SMA阻尼器屈服被延后,结构中混凝土构件越早发生损伤.To improve the brittle fracture mode of coupling beams with small span-depth ratio in RC frame- shear wall structure, a shape memory alloy （SMA） damper is installed into coupling beams in this study. The seismic performance of the structure is studied by numerical analysis. A planner 18-story frame-shear wall structure is utilized. SMA dampers are installed into coupling beams at each story. Static monotonic and cyclic loading are applied on the structure. Influence of two parameters of the coupling beam with SMA damper, the yield force ratio and the yield displacement ratio, on the nonlinear behavior of the whole structure is addressed. The analysis results indicate that the failure mode is remarkably affected by the yield force ratio. For the structures with the same yield displacement ratio, when their yield force ratio decrease, the dampers yield more early and deformation of the coupling beams is more easily to be concentrated in the dampers. At the same time, the structure has good re-centering ability. With the same yield force ratio, the increasing of yield displacement ratio resuhs in the delay of SMA damper yielding and the concrete members damage early.

关 键 词：框架-剪力墙结构 连梁 形状记忆合金阻尼器 PUSHOVER分析 静力往复荷载 

分 类 号：TU398.2[建筑科学—结构工程]