公路桥梁设计及其抗震优化分析  

Highway Bridge Design and Seismic Optimization Analysis

作　　者：王雪玮 康斌锴 徐胜乐 WANG Xue-wei;KANG Bin-kai;XU Sheng-le

机构地区：[1]西安纳川土木工程咨询有限公司,陕西西安710075 [2]西安市政设计研究院有限公司,陕西西安710068

出　　处：《内蒙古公路与运输》2023年第6期35-38,共4页Highways & Transportation in Inner Mongolia

摘　　要：地震灾害会给人类社会造成无法挽回的生命和财产损失,桥梁结构作为震后抢险救灾生命线上的重要节点工程,其抗震设计及构造是否合理显得尤为重要。文章结合桥梁抗震设计现状,阐述了常见桥梁震害的表现形式和其成因,以及现阶段桥梁抗震设计的特点和存在的问题,以桥梁抗震动力分析的相关理论知识为基础,进一步探讨桥梁抗震设计要点。结果表明:在桥梁设计过程中,应结合桥位所处场地及地质条件,选择合理的抗震结构体系;合理采用抗震构造措施可以在很大程度上提高桥梁结构的抗震性能;减隔震装置的应用可以耗散大量地震波带来的能量,对桥梁结构起到保护作用;随着监测手段的进步,越来越多的竖向地震动分量被发现,高烈度区和震中区更加显著,其对桥梁结构的影响不容忽视。研究成果可为桥梁抗震设计提供参考。Earthquake disasters cause irreparable losses of life and property to human society.As an important node project on the lifeline of post-earthquake rescue and disaster relief,whether the bridge seismic design and structural measures are reasonable is particularly important.Combined with the current situation of bridge seismic design,this paper expounds the manifestations and causes of common bridge seismic damage,as well as the characteristics and existing problems of bridge seismic design at current stage.Based on the relevant theoretical knowledge of bridge seismic dynamic analysis,this paper further discusses the key points of bridge seismic design,and draws the following conclusions.In the process of bridge design,a reasonable seismic structural system should be selected in combination with the site and geological conditions where the bridge is located.Reasonable adoption of seismic structural measures can greatly improve the seismic performance of bridge structures.The application of seismic isolation devices can dissipate a large amount of energy brought by seismic waves,and play a protective role on the bridge structure.With the progress of monitoring methods,more and more vertical seismic motion components have been found,especially in high intensity and epicenter regions,and their impact on bridge structures cannot be ignored.The research results can provide reference for seismic design of bridges.

关 键 词：桥梁工程 抗震设计要点 抗震性能研究 抗震措施 震害 

分 类 号：TU421.3[建筑科学—岩土工程] U442.5[建筑科学—土工工程]