“人”字形曲线高架桥地震动多角度输入研究  

Study on multi-angle input of seismic motion for herringbone curve viaduct

作　　者：毕研超 Bi Yanchao

机构地区：[1]济南市交通工程质量与安全中心,山东济南250014

出　　处：《现代城市轨道交通》2022年第4期46-50,共5页Modern Urban Transit

基　　金：国家自然科学基金(51078306)。

摘　　要：文章采用 MIDAS 有限元分析软件对“人”字形曲线高架桥模型进行不同角度地震动输入,分析 x 向及 y 向墩顶位移、墩底弯矩及梁跨中弯矩,找出最不利地震动方向。分析结果表明,“人”字形曲线高架桥在不同方向地震动输入时有不同的地震反应,不同方向位移、弯矩最大值响应程度不一,在抗震设计和灾后维修中应该予以重视。相关研究可为提高此类桥梁的抗震安全提供理论依据,为振动台模拟试验研究提供参考和借鉴。In this paper,MIDAS finite element software is used to input the seismic motions of the herringbone curve viaduct model at different angles,and the X-and Y-direction displacements at the top of pier,the moment at the bottom of pier and the moment at the middle of beam span are analyzed to find out the most disadvantageous direction of seismic motion.The analysis shows that the herringbone curve viaduct has different seismic response when the seismic motion is input in different directions,and the response of the maximum displacements and bending moment in different directions is different,which should be taken into account in seismic design and post disaster maintenance.The related research can provide the theoretical basis for improving the seismic safety of this kind of viaducts and the reference for the shaking table simulation test research.

关 键 词：曲线高架桥 地震 多角度 位移 弯矩 

分 类 号：U24[交通运输工程—道路与铁道工程]