Research on shock absorption effect of lead rubber bearings on beam-arch composite structure

LI Chao; GAN Yaowei; QIN Shiqiang.

doi:10.13471/j.cnki.acta.snus.2019.09.27.2019B094

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Research on shock absorption effect of lead rubber bearings on beam-arch composite structure

Research articles | 更新时间：2023-12-08

- Research on shock absorption effect of lead rubber bearings on beam-arch composite structure
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 60, Issue 3, Pages: 138-146(2021)
- 作者机构：
  
  武汉理工大学土木工程与建筑学院，湖北武汉 430070
- 作者简介：
- 基金信息：
- DOI：10.13471/j.cnki.acta.snus.2019.09.27.2019B094
  CLC： TU
- Published：25 May 2021，
  
  Published Online：16 September 2020，
  
  Received：27 September 2019，
  
  Accepted：31 October 2019
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李超,甘耀威,秦世强.铅芯橡胶支座对梁拱组合结构的减震效果研究[J].中山大学学报(自然科学版),2021,60(03):138-146.

LI Chao,GAN Yaowei,QIN Shiqiang..Research on shock absorption effect of lead rubber bearings on beam-arch composite structure[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2021,60(03):138-146.
李超,甘耀威,秦世强.铅芯橡胶支座对梁拱组合结构的减震效果研究[J].中山大学学报(自然科学版),2021,60(03):138-146. DOI： 10.13471/j.cnki.acta.snus.2019.09.27.2019B094.

LI Chao,GAN Yaowei,QIN Shiqiang..Research on shock absorption effect of lead rubber bearings on beam-arch composite structure[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2021,60(03):138-146. DOI： 10.13471/j.cnki.acta.snus.2019.09.27.2019B094.

摘要

以太原市中南环桥为工程背景，介绍了铅芯橡胶减隔震支座的布置形式与力学特性参数计算方法，研究了不同铅芯截面面积、硬化比和隔震支座尺寸对连续梁拱组合结构拱肋控制截面的减震效果。结果表明：铅芯橡胶支座能有效降低主拱肋内力响应和位移响应。不同铅芯截面面积、硬化比和隔震支座尺寸下主拱肋各控制截面的最大位移隔震率介于35.8% ~ 54.7%之间，最大内力隔震率介于32.3% ~ 64.4%之间；不同力学特征参数对该桥的减震效果不同，相比于硬化比和隔震支座尺寸，铅芯直径对结构隔震率起更大作用；由于隔震支座的布置形式和原始设计支座的存在，在结构位移限值受到限制的同时拱脚内力隔震率最小值仅为4.8%；其他力学特性参数一致且铅芯直径

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=51146757&type=

https://html.publish.founderss.cn/rc-pub/api/common/picture?pictureId=51146784&type=

2.11666679

2.28600001

=180 mm、硬化比

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1.86266661

2.28600001

=0.154、支座直径为1 200 mm时结构减震效果最佳。

Abstract

To solve the most unfavorable seismic response of arch ribs during seismic excitation of continuous beam-arch composite structures and reduce the peak value of structural response， this paper introduces the layout and mechanical parameters of lead rubber anti-seismic bearing with the background of Nanzhonghuan Bridge in Taiyuan City. The calculation method is used to analyze the damping effect of the cross-section area， hardening ratio and isolation bearing size of the continuous beam-arch combination structure. The results show that the lead rubber bearing can effectively reduce the internal force response and displacement response of the main arch rib. The maximum displacement isolation ratio of each control section of the main arch rib is different between 35.8%~54.7%， and the maximum internal isolation is between 32.3%~64.4% under different lead core cross-sectional areas， different hardening ratios and different isolation bearing sizes. Different mechanical characteristic parameters have various damping effects on the bridge. Compared with the hardening ratio and the size of the isolation bearing， the lead core diameter plays a greater role in the structural isolation ratio； due to the arrangement of the isolation bearing and the original design bearing， the existence of the structural displacement limit is limited， while the minimum internal vibration isolation rate of the arch is only 4.8%； when other mechanical parameters are consistent and the lead core diameter

= 180 mm， the hardening ratio α = 0.154， the diameter of the support is 1 200 mm the best shock absorption effect.

关键词

连续梁拱组合结构铅芯橡胶支座力学特征参数减震设计

Keywords

continuous beam arch combination structurelead rubber bearingmechanical characteristic parametersshock absorption design

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Chao LI

Yaowei GAN

Shiqiang QIN

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School of Civil Engineering and Architecture, Wuhan University of Technology

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