Installing isolation bearings on bridge is the main seismic control measures for multi-span girder bridges. A continuous curved girder bridge is taken as an example, and lead-rubber bearings (LRB), viscous dampers and friction pendulum bearings (FPB) are respectively employed on this bridge to mitigate seismic response. Nonlinear dynamic analysis shows that LRB and viscous dampers may amplify the side columns’ tangential base reaction and FPB magnify displacements of girder. The three kinds of seismic control scheme can’t satisfy seismic control target. Then a comprehensive seismic mitigation measure is proposed based on the preceding comparative analysis. The results of these analyses show that the combined isolation is superior to those seismic control schemes in which only one type of isolation bearing is used, and the combined isolation scheme can be beneficial in reducing seismic responses of bridge.
Key words
curved bridge /
lead-rubber bearing /
viscous fluid damper /
friction pendulum bearing /
combined isolation
{{custom_keyword}} /
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] K Kawashima. Seismic Design and Retrofit of Bridge[A]. 12WCEE[C], New Zealand, 2000.
[2] 蒋建军,李建中,范立础.桥梁板式橡胶支座与粘滞阻尼器组合使用的减震性能研究[J].公路交通科技,2005,22(8):44-48.
[3] 范立础, 王志强. 我国桥梁隔震技术的应用 [J]. 振动工程学报, 1999, 12 (2): 173-181.
[4] 陈霄. 隔震曲线桥梁的地震反应分析研究[D].青岛理工大学，2014.
[5] Felix D. Ruiz Julian, Toshiro Hayashikawa, et al. Seismic performance of isolated curved steel viaducts equipped with deck unseating prevention cable restrainers[J]. Journal of Constructional Steel Research，2007 (63): 237-253.
[6] CSI. CSI Analysis Reference Manual [M]. California, Berkly: Computers and Structures, Inc, 2011.
[7] 中华人民共和国交通运输部. JT / T 822-2011 公路桥梁铅芯隔震橡胶支座[S]. 2011.
[8] 魏陆顺，周福霖，刘文光.组合基础隔震在建筑工程中的应用.地震工程与工程振动，27（2）：158-163，2007.
[9] 龚健, 周云, 邓雪松. 某摩擦摆隔震框架结构地震反应分析 [J]. 土木工程学报, 2012, 45(2) 146-150
[10] Gokhan Pekcan, John B. Mander And Stuart S.Chen. Fundamental Considerations for The Design of Non-linear Viscous Dampers. Earthquake Engng. Struct. Dyn. 1999；28：1405-1414
[11] 焦驰宇，张 恺，张连普等.考虑支座摩擦和墩柱损伤的桥梁用液体粘滞阻尼器参数确定方法[J].振动与冲击,2013,32(6):127-131.
[12] PEER. Strong Motion Database [OL].http://peer.berkeley.edu/smcat/search.html,2013.
[13] 建筑抗震设计规范( GB50011 -2010) ［S］． 北京: 中国建筑工业出版社，2010
{{custom_fnGroup.title_en}}
Footnotes
{{custom_fn.content}}
PDF(2023 KB)
