覆土厚度对框架式地道桥受力性能影响

董锐; 李狄钦; 詹刚毅; 翁祥颖; 黄福云

doi:10.13568/j.cnki.651094.651316.2019.10.17.0002

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覆土厚度对框架式地道桥受力性能影响

更新时间：2026-01-19

- 覆土厚度对框架式地道桥受力性能影响
- Journal of Xinjiang University (Natural Science Edition in Chinese and English) Vol. 37, Issue 1, Pages: 94-101(2020)
- 作者机构：
  
  1. 福州大学土木工程学院
  2. 南昌铁路勘测设计院有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.13568/j.cnki.651094.651316.2019.10.17.0002
  CLC： U441
- Published：2020
- 稿件说明：
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[1]董锐,李狄钦,詹刚毅,等.覆土厚度对框架式地道桥受力性能影响[J].新疆大学学报(自然科学版)(中英文),2020,37(01):94-101.
[1]董锐,李狄钦,詹刚毅,等.覆土厚度对框架式地道桥受力性能影响[J].新疆大学学报(自然科学版)(中英文),2020,37(01):94-101. DOI： 10.13568/j.cnki.651094.651316.2019.10.17.0002.

DOI：10.13568/j.cnki.651094.651316.2019.10.17.0002.

摘要

为研究覆土厚度对框架式地道桥受力性能的影响

本文采用理论分析和有限元模拟的方法对某框架桥在施工阶段和成桥阶段多种荷载工况下的变形和应力进行了分析比较.结果表明:(1)随着顶板覆土厚度增加

框架桥最大竖向变形和最大应力均有变小的趋势

但最大横向变形和最大轴向变形基本没有变化;(2)降温是框架桥最大竖向变形的最不利工况

升温是框架桥最大应力、最大横向和轴向变形的最不利工况;(3)施工阶段

中间腹板最大应力随顶板覆土厚度的增加而增大

但增长的幅度很小.降温工况是此时的最不利工况;(4)温度作用是影响框架桥变形和应力的最主要因素

顶板覆土厚度的影响相对较小

在满足列车荷载有效分布厚度的前提下

不必着重考虑.

Abstract

In order to study the in?uence of top plate covering soil thickness on mechanical behavior of frame bridges

the deformation and stress of a frame bridge under various load conditions are analyzed through theoretical analysis and ?nite element simulation in detail in this paper. Research results shown

(1) The maximum vertical deformation and maximum stress of the frame bridge are decreased with the increase of the covering soil thickness

but the maximum transverse and axial deformation basically remain unchanged.(2) Temperature dropping load combination is the most disadvantageous condition for the maximum vertical deformation of the frame bridge

and temperature rising load combination is the most disadvantageous condition for the maximum stress

maximum transverse and axial deformation of the frame bridge.(3) In the construction stage

the maximum stress of the middle web are increased with the increase of the covering soil thickness

but the increase ratio is very small.Temperature dropping load combination is the most disadvantageous condition at this stage.(4) Temperature effect is the most important factor affecting the deformation and stress of the frame bridge. In this stage

the in?uence of the top plate covering soil thickness to the frame bridge is relatively small

and it is unnecessary to consider it when the effective distribution thickness of train load is satis?ed.

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references

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