高层混合结构滞回耗能比的研究  

Evaluation of hysteretic energy to input energy ratio in tall hybrid structures

作　　者：刘哲锋[1] 沈蒲生[2] 

机构地区：[1]长沙理工大学土木与建筑学院,湖南长沙410076 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《地震工程与工程振动》2009年第2期73-78,共6页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(50378035);长沙理工大学博士科研启动基金项目(1004148)

摘　　要：基于结构层间弯曲屈服强度的概念,提出了高层混合结构滞回耗能比的简化计算公式,该公式综合体现了结构以及地震动特征参数对结构滞回耗能比的影响。研究表明,结构滞回耗能比随地震动的峰值速度与峰值加速度的比值的增大而增大;随着地震动幅值的增大,滞回耗能比也线性增加;对于短持时地震动,滞回耗能比与强震持时之间没有一定的规律性,但对于长持时地震动,结构滞回耗能比会随强震持时的增大而线性增加。随着结构弯曲屈服强度系数的增大,结构滞回耗能比呈凹函数下降,结构的自振周期越大,同一弯曲屈服强度系数对应的滞回耗能比越小;钢框架与混凝土剪力墙承载力比值的增加能够降低结构的滞回耗能比。Based on the concept of flexural yield strength factor, this paper proposes a simple method for calculating the ratio of hysteretic energy to input energy （RHEIE） in the tall hybrid structures. The method exhibits the relationship between RHEIE and characteristics of ground motion and structure. In the ground motion research, the RHEIE is increased with two factors,namely the peak ground acceleration and the ratio of peak ground velocity to peak ground acceleration. With the increasing of effective duration, the value of RHEIE increases for ground motion with long effective duration, while it shows not clear trend for ground motion with short effective duration. During the structure investigation, the RHEIE is decreased with three factors respectively, including the flexural yield strength factor, the fundmental period of structures, and the flexural strength ratio of steel frames to concrete walls.

关 键 词：混合结构 滞回耗能比 强震持时 简化计算 

分 类 号：P315.96[天文地球—地震学]