基于瞬时输入能量的长周期结构最大位移反应推算(英文)  

Evaluation of Long-period Structural Maximum Displacement Response on Momentary Input Energy

作　　者：胡冗冗[1] 王亚勇[2] 

机构地区：[1]西安建筑科技大学建筑学院,陕西西安710055 [2]中国建筑科学研究院工程抗震研究所,北京100013

出　　处：《华中科技大学学报（城市科学版）》2006年第4期100-104,共5页Journal of Huazhong University of Science and Technology

摘　　要：基于能量概念的抗震设计方法是改进目前常用结构抗震设计方法的重要途径之一.对于长周期结构,地震最大位移反应是结构抗震设计的控制因素.如何将结构地震能量反应与结构最大位移反应联系在一起是能量设计方法的关键问题.采用时程分析法,分析了单自由度弹塑性模型在强震作用下瞬时输入能量反应和变形反应的关系,根据长周期结构反应的特点,探讨由瞬时输入能量推算结构最大位移反应的近似方法.分析表明,长周期结构强震运动下的破坏趋于首次超越破坏,根据滞回曲线的特征,可以由最大瞬时输入能量推算结构最大位移反应.The structural seismic design on energy concept is one of the important approaches to improve usual method. For a system with a fundamental natural period in the long-period range, maximum displacement governs the seismic design. How to relate energy response with maximum displacement is the key problem. This paper studied the relation of momentary input energy and response displacement of SDOF systems under strong earthquake motions using time history analysis method. An approximate evaluation method of structural maximum displacement was explored according to the characteristics of long-period structural earthquake response. Analysis results show that for a long-period structure system, the damage under strong seismic motions trends to be first-passage failure and maximum displacement response can be estimated approximately by maximum momentary input energy taking hysteretic loop into consideration.

关 键 词：瞬时输入能量 最大位移反应 单自由度体系 

分 类 号：TU311.3[建筑科学—结构工程]