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華中科技大學學報(自然科學版) 2020, Vol. 48 Issue (10): 119-126 DOI10.13245/j.hust.201021

欄目:土木與環境工程
基于兩階段設計的連續梁橋墩底隔震研究
方 蓉 , 張文學 , 譚豫卿
北京工業大學建筑工程學院,北京 100124
摘要 針對連續梁橋一般只設置一個固定墩,在強震區固定墩的抗震能力難以滿足需求這一問題,提出基于兩階段設計的自復位墩底隔震結構(SPSIS-TD).利用振動臺試驗來驗證自復位墩底隔震結構的隔震效果,并通過對比試驗和有限元結果來驗證有限元模型的正確性.結果表明:自復位墩底隔震結構可有效降低固定墩的地震響應;SPSIS-TD體系在第一階段的地震響應同常規塑性鉸結構體系大致相同,在第二階段,SPSIS-TD體系不僅能有效降低固定墩的地震響應,還能減小震后殘余變形,具有較好的自復位能力;當兩側封板發生破壞后,固定墩發生擺動,梁端位移增大.
關鍵詞 連續梁橋 ;墩底隔震 ;自復位 ;隔震結構 ;兩階段設計
Study on pier-bottom seismic isolation based on two-stage design in continuous bridge
FANG Rong , ZHANG Wenxue , TAN Yuqing
College of Architecture and Civil Engineering,Beijing University of Technology,Beijing 100124,China
Abstract In general,only one fixed pier is set in a continuous bridge,so aseismic capacity of the fixed pier is difficult to satisfy the demand in a strong earthquake area.To solve this problem,a self-centering and pier-bottom seismic isolation structure based on two-stage design (SPSIS-TD) was put forward.Shaking table tests were conducted to verify the seismic isolation effect of the self-centering and pier-bottom seismic isolation structure,and the correctness of the finite element model was verified by comparing the test results and the finite element results.Results show that the self-centering and pier-bottom seismic isolation structure can reduce the seismic responses of the fixed pier efficiently.In the first stage,the seismic responses of the SPSIS-TD system are almost the same as that of the conventional plastic hinge structure.In the second stage,the SPSIS-TD system can not only effectively reduce the seismic responses of the fixed pier,but also reduce the residual deformation after the earthquake,which has a better self-centering function.When the sealing plates on both sides are damaged,the fixed pier will swing,and then the displacement of the beam end will increase.
Keywords continuous bridge ; pier-bottom seismic isolation ; self-centering ; seismic isolation structure ; two-stage design
基金資助國家自然科學基金資助項目(51778022);北京自然科學基金資助項目(8172008)

中圖分類號U442.5
文獻標志碼A
文章編號1671-4512(2020)10-0119-08
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文獻來源
方 蓉, 張文學, 譚豫卿. 基于兩階段設計的連續梁橋墩底隔震研究[J]. 華中科技大學學報(自然科學版), 2020, 48(10): 119-126
DOI:10.13245/j.hust.201021
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