西南地震区在役桥梁减震榫抗震加固优化分析研究

蔡一鸣; 曾永平

doi:10.19713/j.cnki.43-1423/u.T20250336

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西南地震区在役桥梁减震榫抗震加固优化分析研究

桥梁隧道与结构 | 更新时间：2025-12-25

- 西南地震区在役桥梁减震榫抗震加固优化分析研究
- Optimization analysis of seismic reinforcement with damping tenons for service beam bridge in high intensity areas of Southwest China
- 铁道科学与工程学报 2025年22卷第12期页码：5409-5422
- 作者机构：
  
  1.西南交通大学土木工程学院，四川成都 610031
  2.海南大学，海南海口 570228
  3.中铁二院工程集团有限责任公司，四川成都 610030
- 作者简介：
  
  曾永平(1982—)，男，湖南邵阳人，正高级工程师，博士，从事桥梁工程抗震、抗风研究；E-mail：12543706@qq.com
- 基金信息：
  
  国家自然科学基金青年科学基金资助项目(52308205);国家重点研发计划青年科学家项目(2022YFB2602500)
- DOI：10.19713/j.cnki.43-1423/u.T20250336
  中图分类号： U442.5⁺5;TU311.3
- 收稿：2025-03-31，
  
  纸质出版：2025-12-28
- 稿件说明：
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蔡一鸣,曾永平.西南地震区在役桥梁减震榫抗震加固优化分析研究[J].铁道科学与工程学报,2025,22(12):5409-5422.

CAI Yiming,ZENG Yongping.Optimization analysis of seismic reinforcement with damping tenons for service beam bridge in high intensity areas of Southwest China[J].Journal of Railway Science and Engineering,2025,22(12):5409-5422.
蔡一鸣,曾永平.西南地震区在役桥梁减震榫抗震加固优化分析研究[J].铁道科学与工程学报,2025,22(12):5409-5422. DOI： 10.19713/j.cnki.43-1423/u.T20250336.

CAI Yiming,ZENG Yongping.Optimization analysis of seismic reinforcement with damping tenons for service beam bridge in high intensity areas of Southwest China[J].Journal of Railway Science and Engineering,2025,22(12):5409-5422. DOI： 10.19713/j.cnki.43-1423/u.T20250336.

摘要

为提出西南强震区典型在役公路桥梁合理减震卡榫加固措施的设计参数，以西南山区典型在役20年的5跨公路连续梁桥为研究背景，考虑地震烈度区场地类型下地震动输入差异性，采用桥梁抗震专用OpenSees软件建立全桥非线性有限元模型，设计了不同的减震卡榫屈服力、初始弹性刚度、初始间隙等关键加固参数组合方案。通过时程分析获得各种加固参数条件下桥梁各关键构件的最大地震响应，建立基于功效系数和熵值的桥梁抗震加固性能综合评估方法，并利用该方法评估了32种减震卡榫加固方案对桥梁系统的影响，得到各种加固方案下全桥抗震性能的综合排名，对比分析了不同场地类型地震烈度区典型公路桥梁的抗震性能的差异性。研究结果表明：相同地震烈度对应不同场地类型地震动对桥梁结构影响差异大，采用减震卡榫加固设计时需要考虑场地类型对桥梁结构抗震性能的影响。采用减震卡榫加固在役梁式桥后，减震卡榫发挥了良好的减震限位作用，提高了在役桥梁结构整体抗震性能。提出了8度0.2

地震区I～IV类场地条件下典型在役连续梁桥用减震卡榫合理加固设计参数。研究结果可为今后类似强震区在役梁式桥的抗震加固提供依据。

Abstract

In order to propose the design parameters of reasonable damping tenon reinforcement measures for typical in-service highway bridges in the southwest strong earthquake areas

a 5-span highway continuous beam bridge in service for 20 years in the southwest mountain area was selected as the research background. The differences in ground motion inputs under different seismic intensity areas and site types were considered

the special bridge seismic OpenSees software was used to establish a full-bridge nonlinear finite element model

and different key reinforcement parameter combination schemes were designed such as the yield force

initial elastic stiffness

and initial gap of the damping tenon. Through time-history analysis

the maximum seismic responses of various key components of the bridge under different reinforcement parameter conditions were obtained. A comprehensive evaluation method for bridge seismic reinforcement performance based on

efficiency coefficient and entropy value was established

and this method was used to evaluate the impact of 32 damping tenon reinforcement schemes on the bridge system. The comprehensive ranking of the seismic performance of the whole bridge under various reinforcement schemes was obtained. The differences in the seismic performance of typical highway bridges in different site types and seismic intensity areas were analyzed and compared. The research results show that the same seismic intensity corresponding to different types of site ground motions has a great impact on the bridge structure. When using damping tenon reinforcement design

it is necessary to consider the impact of site types on the seismic performance of the bridge structure. After using damping tenon to reinforce the in-service beam bridge

desired damping and limiting effects are played

and the overall seismic performance of the in-service bridge structure is improved. The reasonable reinforcement design parameters of damping tenons for typical in-service continuous beam bridges under the 8-degree 0.2

seismic area I to IV site conditions are proposed. It can provide a basis for the seismic reinforcement of similar in-service beam bridges in future strong earthquake areas.

关键词

Keywords

references

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