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連續(xù)鋼構(gòu)橋梁支座消能減振抗震加固技術(shù)研究
劉旭川
摘 要

(甘肅建投土木工程建設(shè)集團(tuán)有限責(zé)任公司, 蘭州 730050)

摘要: 為提升連續(xù)鋼構(gòu)橋梁的抗震性能,提出一種新的連續(xù)鋼構(gòu)橋梁支座消能減振抗震加固技術(shù),建立了連續(xù)鋼構(gòu)橋梁有限元結(jié)構(gòu)模型,并對其進(jìn)行動(dòng)力特性分析與地震反應(yīng)時(shí)程分析,以根據(jù)計(jì)算結(jié)果對支座進(jìn)行消能減振抗震加固設(shè)計(jì)。 通過 MIDAS 軟件建立采用摩擦擺隔震支座的橋梁受力模型,并根據(jù)模型獲取的支座設(shè)計(jì)參數(shù)進(jìn)而確定支座雙線性模型的相應(yīng)參數(shù)。 對橋梁進(jìn)行結(jié)構(gòu)設(shè)計(jì)時(shí),將其設(shè)置為固定支座,且在橋梁橫、縱方向均設(shè)置限位裝置,同時(shí)在摩擦擺隔震支座處加設(shè)新型金屬阻尼裝置以控制橋梁位移過大。 以某連續(xù)鋼構(gòu)橋梁實(shí)際工程為例,采用 MIDAS Civil 軟件對橋梁結(jié)構(gòu)的位移、內(nèi)力進(jìn)行有限元仿真分析。 結(jié)果表明,采用提出的連續(xù)鋼構(gòu)橋梁支座消能減振抗震技術(shù)減小了地震作用下縱橋向與橫橋向上的位移、剪力與彎矩,達(dá)到了良好的消能減振抗震效果。

關(guān)鍵詞: 連續(xù)鋼構(gòu)橋梁支座; 消能減振; 加固技術(shù); 摩擦擺隔震支座

中圖分類號(hào): TU393?? 3,U441?? 1 文獻(xiàn)標(biāo)志碼: A 文章編號(hào):1002?848X(2022)14?0098?05

 

DOI:10?? 19701 / j?? jzjg?? YG211792

 

Research on energy dissipation and vibration reduction seismic reinforcement technology of continuous steel bridge bearings

LIU Xuchuan

(Gansu Construction Investment Civil Engineering Construction Group Co. , Ltd. , Lanzhou 730050, China)

Abstract: In order to improve the seismic performance of continuous steel bridge, a new energy dissipation and vibration reduction reinforcement technology of continuous steel bridge support was proposed. The finite element structural model of continuous steel bridge was established, and its dynamic characteristics and seismic response time history were analyzed, thesupport was designed for energy dissipation and vibration reduction seismic reinforcement according to the calculation results.The bridge force model with friction pendulum vibration isolation bearing was established by MIDAS software, and thecorresponding parameters of the bilinear model of the bearing were determined according to the bearing design parametersobtained from the model. When designing the structure of the bridge, it is set as a fixed bearing, and a limit device was setin the horizontal and vertical directions of the bridge. At the same time, a new metal damping device is added at the frictionpendulum isolation bearing to control the excessive displacement of the bridge. Taking a continuous steel bridge as anexample, the displacement and internal force of the bridge structure were simulated and analyzed by MIDAS Civil software.The results show that the proposed energy dissipation and vibration reduction seismic reinforcement technology of continuoussteel bridge support reduces the displacement, shear force and bending moment of the longitudinal and transverse bridgesunder the action of earthquakes, and achieves a good energy?dissipating, vibration?damping and anti?seismic effect.

Keywords:continuous steel bridge support; energy dissipation and vibration reduction; reinforcement technology; frictionpendulum vibration isolation support

第一作者:劉旭川,學(xué)士,高級工程師,主要從事建筑工程施工技術(shù)及施工管理研究,Email:lylyf7788@ 163. com。
 
[引用本文] 劉旭川. 連續(xù)鋼構(gòu)橋梁支座消能減振抗震加固技術(shù)研究[ J]. 建筑結(jié)構(gòu),2022,52(14):98?102. LIUXuchuan. Research on energy dissipation and vibration reduction seismic reinforcement technology of continuous steelbridge bearings[J]. Building Structure,2022,52(14):98?102.
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