隔震桥梁设计中组合阻尼比取值的研究现状  

Status of Study on Values of Combined Damping Ratio in Design of Seismic Isolated Bridges

作　　者：兰海燕[1] 

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《公路交通技术》2010年第5期56-57,61,共3页Technology of Highway and Transport

摘　　要：工程师在使用弹性反应谱分析铅芯隔震支座桥梁时,需要确定组合阻尼比来实施等效线性化分析。美国、日本抗震规范均有相应公式规定,台湾学者也提出了规则桥梁的简化分析方法,而国内目前对此问题的研究不多。在调研多国规范和学者论文基础上,总结目前隔震桥组合阻尼比的确定方法,并简单介绍当前的研究进展,为下一步展开对该问题的深入研究打下基础。When analyzing the bridges with seismic isolated lead supports by means of elastic response spectrum,engineers need to determine combined damping ratio for implementation of equivalent linear analysis.The corresponding formula provisions are available in seismic codes in U.S.A and Japan,and also scholars from Taiwan district propose simplified analysis methods for regular bridges,nevertheless as of now this issue is less studied at home.On the basis of investigating multinational codes and scholars＇ theses,this paper draws a conclusion on determination methods for combined damping ration of seismic isolated bridges at present,and briefly introduces development of current study,laying a foundation for further expansion of deeper study on this issue.

关 键 词：隔震桥梁 等效线性化 阻尼比 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]