Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (9): 118-122.doi: 10.3969/j.issn.1000-565X.2010.09.022

• Architecture & Civil Engineering • Previous Articles     Next Articles

Strand Tension in Anchor-Span Suspension Bridge at Different Temperatures

Tan Hong-mei 1.2  Xiao Ru-cheng1   

  1. 1.Department of Bridge Engineering,Tongji University,Shanghai 200092,China;2.Key Laboratory of Bridge-Structure Engineering Ministry of Communications,Chongqing 400074,China
  • Received:2009-12-09 Revised:2010-03-28 Online:2010-09-25 Published:2010-09-25
  • Contact: 谭红梅（1981-），女，博士，主要从事桥梁工程研究． E-mail:81chenxingthm@mail．tongji．edu．cn
  • About author:谭红梅（1981-），女，博士，主要从事桥梁工程研究．
  • Supported by:

    国家“863”计划项目（2006AA11Z120）; 重庆交通大学（桥梁）结构工程重点实验室开放基金资助项目（CQSLBF-Y10-6）

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Abstract:

Two methods,one is based on the simplified expression and the other is on the calculation program,are proposed to reveal the influence of temperature on the strand tensions in the anchor span and each side span of suspension bridge,with Zhujiang Huangpu Bridge in Guangzhou as an example.It is found that the calculated results obtained from the two methods are approximate to each other,that temperature variation has a greater influence on the tension in anchor span than on that in side span when the saddles are fixed,that the influence coefficient of temperature in side span and anchor span are respectively about-1kN/℃ and-6～-7kN/℃,that the force difference between side span and anchor span may go beyond the maximum friction when the temperature change exceeds the ideal range,so that some countermeasures should be taken to avoid the strand sliding during the construction,and that the influence coefficient of temperature in anchor span is very small when the saddles are free.

Key words: temperature, suspension bridge, anchor span, side-span, tension, friction