- 摘 要
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（1 上?？七M咨詢有限公司， 上海 200052； 2 同濟大學結(jié)構(gòu)工程與防災(zāi)研究所， 上海 200092）
［摘要］主要介紹了某大跨連續(xù)鋼結(jié)構(gòu)桁架商業(yè)廊橋的隔震分析與設(shè)計，考慮到工程具體情況，設(shè)置了鉛芯橡膠支座，合理確定了鉛芯橡膠支座的尺寸和設(shè)計參數(shù)，并采用MIDAS Gen軟件對結(jié)構(gòu)進行了多遇地震和罕遇地震作用下的線性與邊界非線性時程分析及隔震設(shè)計。結(jié)果表明，設(shè)置合適的鉛芯橡膠支座能夠使得該連續(xù)鋼結(jié)構(gòu)桁架廊橋工程達到較好的隔震效果，對類似的工程有借鑒意義。
［關(guān)鍵詞］鋼結(jié)構(gòu)桁架廊橋； 隔震分析； 鉛芯橡膠支座； 邊界非線性時程分析
中圖分類號：TU393-3文獻標識碼：A文章編號：1002-848X(2018)09-0014-05
Seismic isolation analysis and design of a long-span continuous steel truss bridge
Lu Wenzhong1,2
(1 WSP Group, Shanghai 200052, China; 2 Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai 200092, China)
Abstract:The seismic isolation analysis and design of a long-span continuous steel truss commercial bridge were introduced. Taking into account the specific circumstances of the project, lead rubber bearings were adopted and the size and design parameters of lead rubber bearings were determinated reasonably. MIDAS Gen software was used to conduct the linear and nonlinear boundary time-history analyses for the seismic isolation design under frequent earthquake and rare earthquake. The results show that the appropriate arrangement of lead rubber bearings can enable the continuous steel truss bridge project to achieve the good isolation effect and it will also provide a good reference for similar projects.
Keywords:steel truss bridge; seismic isolation analysis; lead rubber bearing; boundary nonlinear time history analysis
作者簡介：陸文忠，工程師，一級注冊結(jié)構(gòu)工程師，注冊土木工程師（巖土），Email：Luwenzhong@gmail.com。
