下承式钢桁结合梁桥的畸变分析

陈玉骥; 罗旗帜

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下承式钢桁结合梁桥的畸变分析

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- 下承式钢桁结合梁桥的畸变分析
- Analysis for Distortion of Through Steel-Truss Composite Beam Bridge
- 中北大学学报（自然科学版） 2010年31卷第4期页码：404-408
- 作者机构：
  
  佛山科学技术学院土木工程与建筑系
- 作者简介：
- 基金信息：
  
  广东省自然科学基金资助项目(915106310100005)
- DOI：
  中图分类号：
- 纸质出版：2010
- 稿件说明：
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陈玉骥, 罗旗帜. 下承式钢桁结合梁桥的畸变分析[J]. 中北大学学报（自然科学版）, 2010,31(4):404-408.

陈玉骥, 罗旗帜. Analysis for Distortion of Through Steel-Truss Composite Beam Bridge[J]. 2010, 31(4): 404-408.
陈玉骥, 罗旗帜. 下承式钢桁结合梁桥的畸变分析[J]. 中北大学学报（自然科学版）, 2010,31(4):404-408. DOI：

陈玉骥, 罗旗帜. Analysis for Distortion of Through Steel-Truss Composite Beam Bridge[J]. 2010, 31(4): 404-408. DOI：

摘要

采用对下承式钢桁结合梁桥进行连续化处理的力学模型

考虑结构在畸变荷载作用下的变形特征

给出了结构的变形能.基于能量变分原理推导了下承式钢桁结合梁在畸变荷载作用下的近似解析解.通过一个下承式钢桁结合梁桥算例分析了结构在畸变荷载作用下的受力特性.结果表明:该桥的最大畸变位移约为双线对称活载作用下主桁最大挠度的1/3;主桁的应力水平较低

变化趋势与畸变位移相吻合;混凝土板顺桥向正应力

沿横桥向板端最大

正中为零

应力水平与双线对称活载作用下的相当.

Abstract

According to deformation behavior of the through steeltruss composite beam bridge in the action of the distortion load

the deformation energy of the structure using the mechanic model for the through steel-truss composite beam bridge to be made continuous treatment was given.The approximate solution of the through steel-truss composite beams was taken based on the energy variational principle.The mechanic behavior of the through steel-truss composite beams was analyzed with an example.The results show that the maximum distortion displacement of the bridge is about 1/3 maximum deflection of main truss under live load symmetry in the two-lines;stresses of main trusses are very low and their change trend is consistent with the distortion;stresses of concrete are the greatest at plate end along the transverse direction and zero in the middle of width;the stress level is correspond with that under symmetry live load.

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references

何畏,李乔.板桁组合结构体系受力特性及计算方法研究[J].中国铁道科学,2001,22(5):65-72.He Wei,Li Qiao.Study on features of force bearing of plate and truss composite structure system and the calculationmethod[J].China Railway Science,2001,22(5):65-72.(in Chinese)

谭莹,田启贤.板桁组合结构的受力特性及空间分析方法[J].铁道建筑,2001(8):2-5.Tan Ying,Tian Qixian.Features of force bearing and method of spatial analysis of plate and truss compositestructure[J].Railway Construction,2001(8):2-5.(in Chinese)

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陈玉骥.下承式钢桁结合梁桥在纯扭转荷载作用下的近似解析解[C].广州:全国桥梁学术会议论文集,2007.

陈玉骥.下承式钢桁结合梁在双线对称荷载作用下的近似解[J].铁道学报,2008,30(1):48-52.Chen Yuji.Approximate solution of through steel-truss composite beams under the action of double-track symmetryloads[J].Journal of the China Railway Society,2008,30(1):48-52.(in Chinese)

陈玉骥.高速铁路下承式钢桁梁-混凝土结合桥的计算理论及其应用[D].长沙:中南大学,2004.

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