双肢剪力墙耗能连梁刚度对整体抗侧刚度的影响及分析  

Theoretical analysis for evaluating influence of stiffness of coupling beam with central shear link on reinforced concrete shear walls

作　　者：李冬晗 张沛洲[1] 欧进萍[1,2] 

机构地区：[1]大连理工大学建设工程学部,辽宁大连116024 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090

出　　处：《地震工程与工程振动》2014年第4期148-153,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51261120376;91315301-12)

摘　　要：文章基于结构力学理论推导并经拟合得到形式简洁的双肢剪力墙顶点位移通用公式,定义了耗能连梁在剪切作用下弯曲刚度、剪切刚度、整体刚度影响系数及双肢剪力墙结构抗侧刚度影响系数,且重点分析连梁刚度的削弱程度对结构整体抗侧刚度的影响。研究结果表明剪力墙结构抗侧刚度影响系数与剪力墙整体系数α、轴向变形影响系数T及连梁刚度影响系数γk有关,且与连梁刚度影响系数的关系受侧向荷载分布形式的影响很小;对常见双肢剪力墙结构,当其刚度削弱程度小于20%时,连梁刚度最多可允许降低40%。该分析为连梁截断式剪切型阻尼器设计参数的确定提供了依据。A simplified formula for calculating the top lateral displacement of coupled shear walls is developed on the basis of the structural mechanics method. Then several stiffness ratios of coupling beams and lateral stiffness ratio of shear walls are defined. Finally the influence of coupling beam stiffness ratio on the reinforced concrete shear walls is analyzed and evaluated. The results show that lateral stiffness ratio of shear walls γK is relevant to the structural parameter a, axial stiffness coefficient T and stiffness ratio of coupling beam γk, and the lateral loading patterns have little influeuce on the relationship between the parameters TK and γk- For the coupled shear walls with regular geometries, the coupling beam stiffness ratio γK can be reduced by 40% when the parameter γK is allowed to be reduced less than 20%, which provides great support to the design of the coupling beams with central shear link

关 键 词：双肢剪力墙 耗能连梁 刚度影响系数 抗侧刚度 结构力学 

分 类 号：TU398.2[建筑科学—结构工程] TU318