徐盐铁路跨越郯庐断裂带桥梁抗震设计  

Seismic Design of Bridges on the Xuzhou-Yancheng High-Speed Railway Crossing the Tancheng-Lujiang Fault Zone

作　　者：康周科 KANG Zhouke(China Railway Fifth Survey and Design Institute Group Co.Ltd.,Beijing 102600,China)

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《铁道建筑技术》2025年第1期102-104,共3页Railway Construction Technology

基　　金：中铁第五勘察设计院集团有限公司科技研发计划项目(T5Y2015-C04)。

摘　　要：徐盐铁路跨越郯庐断裂带桥梁地处高烈度、长周期地震区,地震动峰值加速度最大值为0.340 m/s2、地震动反应谱特征周期最大值为1.10 s,桥梁长度约24 km,包含简支梁、连续梁、连续梁-拱等多种桥式结构,抗震设计复杂。本文介绍了该段桥梁的抗震设计原则、地震动参数采用原则、震后墩梁相对位移限值确定原则、上下部结构选用、支座选用及布置等内容,简述了连续梁桥、连续梁-拱桥采用的减隔震技术,提出了减缓地震对桥梁工程危害的3项措施及桥梁抗震设计的4条建议,可为类似桥梁抗震设计提供有效案例支持。The bridge spanning the Tancheng-Lujiang Fault Zone on the Xuzhou-Yancheng High-speed Railway is located in a high-intensity and long-period earthquake zone,with a maximum ground motion peak acceleration of 0.340 m/s2 and a maximum characteristic period of 1.10 s in the seismic response spectrum.The bridge is about 24 kilometers long and includes various bridge structures such as simply-supported beams,continuous beams,and continuous beam-arch structures,making seismic design complex.This article introduces the seismic design principles,principles for using seismic parameters,principles for determining post earthquake relative displacement limits of piers and beams,selection of upper and lower structures,selection and layout of supports,and other related content for this section of the bridge,and briefly describes the seismic mitigation and absorption techniques that have been applied in continuous beam bridges and continuous beam-arch bridges.It also proposes three measures to mitigate the harm of earthquakes to bridge engineering and four suggestions for seismic design of bridges,which can provide effective case support for seismic design of similar bridges.

关 键 词：桥梁 抗震设计 高烈度、长周期地震区 减隔震技术 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]