吉林大学学报(工学版) ›› 2023, Vol. 53 ›› Issue (6): 1711-1718.doi: 10.13229/j.cnki.jdxbgxb.20230117

• 交通运输工程·土木工程 • 上一篇    

基于数值仿真的简支梁桥震致残余位移分析

顾正伟1(),张攀2,吕东冶3,吴春利1(),杨忠4,谭国金1,黄晓明5   

  1. 1.吉林大学 交通学院，长春 130022
    2.长春市建设工程安全监督站，长春 130033
    3.吉林省交通信息通信中心，长春 130021
    4.吉林省交通规划设计院，长春 130021
    5.东南大学 交通学院，南京 210018
  • 收稿日期:2023-02-08 出版日期:2023-06-01 发布日期:2023-07-23
  • 通讯作者: 吴春利 E-mail:gzw@jlu.edu.cn;clwu@jlu.edu.cn
  • 作者简介:顾正伟（1981-），女，讲师，博士.研究方向：桥梁抗震理论与方法.E-mail：gzw@jlu.edu.cn
  • 基金资助:
    国家重点研发计划项目(2021YFB2600604);吉林省教育厅科学技术研究项目(JJKH20211114KJ);吉林省交通运输科技计划项目(2021-01-02)

Earthquake⁃induced residual displacement analysis of simply supported beam bridge based on numerical simulation

Zheng-wei GU1(),Pan ZHANG2,Dong-ye LYU3,Chun-li WU1(),Zhong YANG4,Guo-jin TAN1,Xiao-ming HUANG5   

  1. 1.College of Transportation，Jilin University，Changchun 130022，China
    2.Changchun Construction Projects Quality Surveillance，Changchun 130033，China
    3.Jilin Provincial Traffic Information and Communication Center，Changchun 130021，China
    4.Jilin Traffic Planning and Design Institute，Changchun 130021，China
    5.School of Transportation，Southeast University，Nanjing 210018，China
  • Received:2023-02-08 Online:2023-06-01 Published:2023-07-23
  • Contact: Chun-li WU E-mail:gzw@jlu.edu.cn;clwu@jlu.edu.cn

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摘要：

基于ANSYS建立了具有铅芯橡胶支座、摩擦摆支座和黏滞阻尼器的简支梁桥有限元模型。通过改变地震激励、结构参数和减隔震装置参数，进行了地震荷载作用下多种工况的桥梁震致残余位移分析。结果表明，残余位移对地震波频谱特性较为敏感，且随峰值加速度、剪跨比的增大显著增大，随持续时间和墩高的增加有所增大；残余位移对铅芯橡胶支座和摩擦摆支座参数变化较为敏感，黏滞阻尼器参数变化对其影响较小，可通过增大铅芯橡胶支座屈服力、屈服后刚度、摩擦摆支座摩擦因数、黏滞阻尼器阻尼孔长度、液缸外径、硅油黏度和减小摩擦摆支座曲率半径的方法降低结构震致残余位移。本文研究结果可为桥梁结构抗灾韧性提升提供理论依据。

关键词: 桥梁工程, 简支梁桥, 震致残余位移, 减隔震装置, 影响要素, 数值模拟

Abstract:

Finite element models of simply-supported beam bridge with lead rubber bearing， friction pendulum bearing and viscous damper was established separately based on ANSYS. Through changing seismic excitation， structural parameters and vibration reduction isolation device parameters， the earthquake-induced residual displacement of bridge was analyzed. The results showed that the residual displacement was sensitive to seismic spectrum characteristics，and it increased significantly both with the rise of peak acceleration and shear span ratio， and it increased with the enlarge of duration and pier height at the same time. The residual displacement was the most sensitive to the change in parameters of lead rubber bearing and friction pendulum bearing， while changes in parameters of viscous dampers had less impact on it. The residual displacement could be reduced by increasing yield force and post-yield stiffness of lead rubber bearing， friction coefficient of friction pendulum bearing， length of the damping hole， outer diameter and viscosity of silicone oil of viscous damper， and by reducing curvature radius of friction pendulum bearing. The research results can provide theoretical basis for the improvement of disaster resilience of bridge structures.

Key words: bridge engineering, simply supported beam bridge, earthquake-induced residual displacement, influencing factors, vibration reduction and isolation device, numerical simulation

中图分类号: 

  • U442.55

图1

桥梁结构尺寸及有限元模型"

图2

减隔震装置本构模型"

图3

地震动参数对残余位移影响"

图4

桥梁结构参数对残余位移影响"

图5

铅芯橡胶支座参数对残余位移的影响"

图6

摩擦摆支座参数对残余位移的影响"

图7

双出杆式孔隙黏滞阻尼器流体模型"

图8

黏滞阻尼器力-速度图"

表1

黏滞阻尼器几何尺寸、硅油黏度对应的阻尼系数和速度指数"

参数阻尼孔道长度/mm阻尼缸体外径/mm硅油黏度/10-3（m2·s-1）
701101301001201401601.52.02.53.0
C/［kN·（m·s-1）-α ］3.1315.0577.9193.1314.8864.0845.1047.2139.06710.72012.340
α1.2041.151.1081.2041.1461.2231.2271.1071.1131.1211.127

图9

黏滞阻尼器参数对残余位移影响"

表2

影响要素相关程度分析"

要素相关程度高中低
地震波种类√
峰值加速度√
持续时间√
墩高√
剪跨比√
屈服力√
屈服后刚度√
摩擦因数√
曲率半径√
阻尼系数√
速度指数√
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