抗震结构能量设计方法中阻尼耗能的研究  

Study on dissipative energy in energy method of seismic structures

作　　者：杨晓明[1] 史庆轩[2] 丰定国[2] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2006年第2期189-193,198,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：陕西省教育厅专项资金资助项目(JK0135)

摘　　要：基于能量原理,在非线性动力时程分析的基础上,对抗震结构地震总输入能Ei(t)中的阻尼耗能Ed(t)进行了分析研究,重点探讨了不同阻尼比、不同滞回模型、地震波频谱和加速度峰值对阻尼耗能的影响.计算分析表明,阻尼比ξ对阻尼耗能影响最显著,Ed/Ei值和Ed/Eh值随阻尼比ξ而增加,当ξ=0.20时,阻尼耗能占到总耗能的80%左右.阻尼耗能可以有效地减小滞回耗能,增加阻尼比是减少结构累积损伤破坏,提高结构抗震性能的有效途径.Based on energy method and inelastic dynamic analysis method, the damping energy Ed（t） which is included in the total earthquake input energy Ei（t） of building structures has been studied. Factors such as damping ratio, hysteretic models, earthquakes period and peak acceleration which influence dissipative energy are analyzed in detail. Calculation results show that the damping ratio ξ has a great effect on the ratio of Ed to Ei： the value of Ed/Ei and Ed/Eh increased with the increment of ξ. When ξ is equal to 0.20, the value of Ed/Ei is about 80%. It is also proved that damping energy could greatly reduce hysteretic energy. As a result, increasing the damping ratio ξ is an effective way to lessen cumulated damage and improve seismic capacity of buildings.

关 键 词：非线性动力分析 地震反应 阻尼比 阻尼耗能 滞回耗能 

分 类 号：TU375[建筑科学—结构工程]