郭凡，杨永清，周厚斌，刘国军

（西南交通大学土木工程学院，成都 610031）

 

[摘要] 对某斜拉桥索塔锚固区节段建立有限元计算模型进行空间应力分析，并与足尺模型试验得出的结果相比较，对该桥塔锚固区工作性能及安全性进行评价。测试分析U形塑料波纹管孔道摩阻系数和钢束伸长值，研究了小半径环向U形预应力束与拉索作用下的锚固区应力与变形情况，提出构造及设计上的建议，为设计与施工提供依据，也可为同类斜拉桥索塔锚固区的受力分析提供借鉴。

[关键词] 斜拉桥；索塔锚固区；应力；有限元分析；足尺模型试验

中图分类号：U443-38文献标识码：A文章编号：1002-848X(2012)10-0071-04

 

Guo Fan, Yang Yongqing, Zhou Houbin, Liu Guojun

(School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China)

 

Abstract: A FEM model of the cable tower anchorage zone section in certain cable stayed bridge was built to analyze the spatial stress field, and the values obtained by spatial stress analysis and full scale model test were compared. The evaluation of the operating capability and safety of the bridge tower was brought forward. The frictional coefficient values of the U-shaped plastic corrugated pipes and the extension values of tendons were analyzed. Stress distribution and deformation under U-shaped and small radius ring prestressed tendons and cable force were investigated. Some suggestions about constitution and design were given to similar force analysis of cable tower anchorage zone as references.

Keywords: cable stayed bridge; cable tower anchorage zone; stress; FEM analysis; full scale model test

作者简介：郭凡，博士研究生，Email：guofandr@163.com。

 

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