高烈度地震区大跨度引桥结构的应用数值模拟分析  

Numerical Simulating Analysis for Application of Long-span Bridge Approach Structure in High-intensity Seismic Zone

作　　者：周鑫强[1] 郭浩霖 覃杰[1] 陈良志[1] Zhou Xinqiang;Guo Haolin;Qin Jie;Chen Liangzhi(CCCC FHDI Engineering Co.,Ltd.,Guangzhou Guangzhou 510230,China)

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510230

出　　处：《港工技术》2022年第2期50-54,共5页Port Engineering Technology

摘　　要：本文提出了一种适用于高烈度地震区的大跨度引桥结构,引桥标准结构段中心设双排桩抗震墩台以提高结构的抗震能力,大跨度预应力T梁与中心墩台、两侧排架横梁之间采用固接形式以增强结构抗震的整体性。以印尼某码头工程为例,采用大型国际通用有限元软件,建立三维有限元模型进行了数值模拟,运用参数化设计语言在软件平台上进行二次开发,显著提高了有限元模型的后处理效率,并对比分析了引桥接岸处不同支座形式的作用。计算结果表明,该大跨度的引桥结构能较好适应高烈度地震作用,满足规范要求,经济合理,环境友好;引桥接岸处采用滑移支座代替固接支座或铰接支座,可实现结构段内刚度的均匀分配,充分发挥每个排架的抗震能力,减少工程造价。A long-span bridge approach for high-intensity seismic zone is proposed,that is,an anti-seismic abutment with double-row piles is set in the center of standard structure section of the bridge approach,which improves anti-seismic capacity of the structure.In addition,a rigid connection is adopted among long-span prestressed T-beam,central abutment and the crossbeams on both sides to enhance the seismic resistance of the whole structure.Based on a dock project in Indonesia,a large-scale universal finite element software was used to build a 3D model for numerical simulation,and parametric design language was used for secondary development on the software platform,which significantly upgraded the model in post-processing efficiency.Comparative analysis was also carried out for the effects of different types of supports at the shore-connection of bridge approach.The calculation results show that long-span approach bridge can resist high-intensity earthquake,satisfy the requirements specified in relevant code as an economical,reasonable and environmentally friendly structure.Sliding support applies to the shore-connection of bridge approach instead of rigid connection or hinged support,which will support the uniform distribution of rigidity of structure section,give full play to the seismic capacity of each bent and reduce project cost.

关 键 词：高烈度地震区 大跨度 引桥结构 滑移支座 数值模拟 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程]