高烈度区抱翅型拱梁组合体系桥横向减震体系研究  

Study on Transverse Damping System of Winged Arch-beam Composite System Bridge in High Intensity Area

作　　者：吴睿麒 张锦程 路洪艳 王海楠 苏士才 Wu Ruiqi;Zhang Jincheng;Lu Hongyan;Wang Hainan;Su Shicai(Bejjing General Municipal Engineering Design and Research Institute Co.,Ltd,100082,China;Beijing Engineering Research Center of Urban Bridge Security,100082,China;Xianghe County Transportation Bureau,Langfang 065400,China)

机构地区：[1]北京市市政工程设计研究总院有限公司,100082 [2]北京市城市桥梁安全保障工程技术研究中心,100082 [3]香河县交通运输局,廊坊065400

出　　处：《特种结构》2024年第3期83-87,共5页Special Structures

摘　　要：抱翅型拱梁组合体系桥是一种新型的组合结构体系,结构构造异形,相比于常规的梁桥、拱桥、索承体系桥等,其动力特性具有特殊性。本文以高烈度区某(56+164.5+35)m抱翅型拱梁组合体系桥为例建立有限元模型,分析了该桥在常规横向约束体系下的动力特性,采用非线性时程分析方法得到该桥在罕遇地震下的位移及内力响应情况。根据响应情况提出一种“横向滑动支座+液体粘滞阻尼器+限位挡块”的约束方案。计算结果表明,横向滑动支座+阻尼器的横向减震效果良好,可以明显控制上部结构位移、改善下部结构的受力;挡块可以作为附加抗震措施进一步限制主梁位移且避免阻尼器超出行程。研究结果可供类似桥型设计参考。The winged arch-beam composite system bridge is a new type of composite structure system with special-shaped structure.Compared with the conventional beam bridge,arch bridge and cable-supported system bridge,its dynamic characteristics are special.In this paper,a(56+164.5+35)m winged arch-beam com-posite system bridge in high intensity area was taken as an example.The finite element model was established,and the dynamic characteristics of the bridge under the conventional lateral restraint system were analyzed.The nonlinear time history analysis method was used to obtain the displacement and internal force response of the bridge under rare earthquakes.According to the response,a constraint scheme of"lateral sliding bearing+fluid viscous damper+limit block"was proposed.The calculation results showed that the lateral damping effect of the lateral sliding bearing+damper was good,which can significantly controlled the displacement of the superstruc-ture and improved the stress of the substructure.The block can be used as an additional anti-seismic measure to further limit the displacement of the main girder and avoid the damper exceeding the stroke.The research results can be used as a reference for similar bridge design.

关 键 词：高烈度区 拱梁组合体系 非线性时程分析 液体粘滞阻尼器 横向减震 

分 类 号：U442.55[建筑科学—桥梁与隧道工程] TU997[交通运输工程—道路与铁道工程]