Journal of Jilin University(Engineering and Technology Edition) ›› 2023, Vol. 53 ›› Issue (6): 1711-1718.doi: 10.13229/j.cnki.jdxbgxb.20230117

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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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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

CLC Number: 

  • U442.55

Fig.1

Structure size and finite element model of bridge"

Fig.2

Constitutive model of vibration reduction and isolation device"

Fig.3

Effect of ground motion parameters on earthquake-induced residual displacement"

Fig.4

Influence of bridge structural parameters on earthquake-induced residual displacement"

Fig.5

Influence of lead rubber bearing parameters on earthquake-induced residual displacement"

Fig.6

Influence of friction pendulum bearing parameters on earthquake-induced residual displacement"

Fig.7

Fluid model of double-outlet rod type pore viscous damper"

Fig.8

Force-velocity diagram of viscous damper"

Table 1

Geometric size of viscous damper and viscosity of silicone oil on damping coefficient and velocity index"

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

Fig.9

Influence of viscous damper parameters on earthquake-induced residual displacement"

Table 2

Analysis of correlation degree of influencing factors"

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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