板式橡胶支座在连续梁桥减隔震设计中的应用.doc

文档介绍：
板式橡胶支座在连续梁桥减隔震设计中的
应用#
孙航1,高秀云1,丁继武2*
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(1. 哈尔滨工业大学,交通科学与工程学院,哈尔滨,150090;
2. 辽宁省沈阳市交通设计院,沈阳 110168)
摘要:针对实际地震中连续梁桥常发生固定墩损毁的震害现象,本文结合某座四跨连续梁桥,
分别采用了盆式橡胶支座和板式橡胶支座两种支座形式,通过板式橡胶支座的剪切变形来适
应结构在正常使用状态下的纵向变形,并建立了相应的有限元模型,进行了纵向地震荷载作
用下的时程响应分析,结果表明采用板式橡胶支座后连续梁桥的水平地震力在各个桥墩之间
的分配更为平均和合理,尤其是在长周期近断层地震激励下,该减隔震措施能有效的提高连
续梁桥桥墩的抗震能力。本文探讨了在连续梁桥设计中采用板式橡胶支座进行减隔震的可行
性,研究结果可为同类工程参考。
关键词:板式橡胶支座;连续梁桥;抗震设计;减隔震控制
中图分类号:TU997
the Applications of Laminated Rubber Bearing on the
Seismic Control of the Continuous Beam
SUN Hang1, GAO Xiuyun1, DING Jiwu2
(1. School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin
150090;
2. Shenyang Highway Plan&Design Institute,Shenyang 110168)
Abstract: Aiming at the phenomenon that the fixed piers of the continuous beams have been
damaged during the earthquakes, In this paper the seismic responses were carried on based on a
four-span continuous beam, pot rubber bearing and laminated rubber bearing were selected, and
corresponding finite element models were built. The results indicate that the distributions of the
longitude seismic forces between the piers are more reasonable for the latter bearing, especially
under the long period seismic excitations. The possiblity of adopting the laminated rubber
bearing on the seismic control on the continuous beam were discussed, and the results ca