考虑剪力滞效应的先简支后连续-箱梁徐变效应分析

孙永新; 蔺鹏臻

doi:10.3879/j.issn.1000-0887.2015.08.007

考虑剪力滞效应的先简支后连续-箱梁徐变效应分析

doi: 10.3879/j.issn.1000-0887.2015.08.007

甘肃省道路桥梁与地下工程重点实验室(兰州交通大学), 兰州 730070

基金项目: 国家自然科学基金（51208242；51368031）;甘肃省杰出青年基金（1210RJDA009）;中国博士后科学基金（2012M521815）;教育部“长江学者和创新团队发展计划”（IRT1139）

详细信息

作者简介:
孙永新（1989—），男，甘肃张掖人，硕士生(E-mail: 391655098@qq.com);蔺鹏臻(1977—)，男，甘肃甘谷人，教授，博士（通讯作者. E-mail: pzhlin@mail.lzjtu.cn）.

中图分类号: U441^+.5
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出版历程
- 收稿日期: 2015-02-02
- 修回日期: 2015-04-17
- 刊出日期: 2015-08-15

Creep Analysis of Simply Supported-to-Continuous Box Girders Under Shear Lag Effect

Key Laboratory of Road & Bridge and Underground Engineering of Gansu Province(Lanzhou Jiaotong University), Lanzhou 730070, P.R.China

Funds: The National Natural Science Foundation of China（51208242;51368031）

摘要

摘要: 为了分析混凝土箱梁的徐变效应与剪力滞效应的相互影响，基于箱梁剪力滞效应计算的能量变分方法，推导了混凝土箱梁徐变受剪力滞效应影响的次内力和应力计算公式.结合先简支后连续箱梁算例，计算了受剪力滞效应影响后的徐变弯矩和应力，分析了考虑徐变效应影响的剪力滞系数.结果表明，与不考虑剪力滞效应的结果相比，剪力滞效应增大了箱梁徐变效应.对算例箱梁，考虑剪力滞效应后，对中支点截面处徐变的影响最大，次内力增大42.56%，腹板处应力减小8.5%.
- 混凝土箱梁 /
- 剪力滞效应 /
- 徐变 /
- 先简支后连续
Abstract: To analyze how creep interacts with shear lag effect in concrete box girders, the calculation formulae for the creep secondary internal force and stress were derived with the energy variation method. With a simply supported-to-continuous box girder for example, the creep bending moment and stress were calculated under the shear lag effect, and the shear lag coefficients were obtained under the influence of creep. The results show that the shear lag effect increases the creep stress significantly. Under the shear lag effect, the creep variation at the intermediate bearing section is the maximum, where the secondary bending moment increases by 42.56% and the flange normal stress above the web plate decreases by 8.5%.
- concrete box girder /
- shear lag effect /
- creep /
- simply supported-to-continuous

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参考文献(15)

[1]	蔺鹏臻. 混凝土箱梁剪力滞效应的分析理论与应用研究[M]. 北京: 人民交通出版社, 2012.(LIN Peng-zhen. Research on Analysis Theory & Application of Shear Lag Effect for Concrete Box Girders [M]. Beijing: China Communications Press, 2012.(in Chinese))
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考虑剪力滞效应的先简支后连续-箱梁徐变效应分析

doi: 10.3879/j.issn.1000-0887.2015.08.007

作者简介:
孙永新（1989—），男，甘肃张掖人，硕士生(E-mail: 391655098@qq.com);蔺鹏臻(1977—)，男，甘肃甘谷人，教授，博士（通讯作者. E-mail: pzhlin@mail.lzjtu.cn）.

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Creep Analysis of Simply Supported-to-Continuous Box Girders Under Shear Lag Effect

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考虑剪力滞效应的先简支后连续-箱梁徐变效应分析

doi: 10.3879/j.issn.1000-0887.2015.08.007

作者简介: 孙永新（1989—），男，甘肃张掖人，硕士生(E-mail: 391655098@qq.com);蔺鹏臻(1977—)，男，甘肃甘谷人，教授，博士（通讯作者. E-mail: pzhlin@mail.lzjtu.cn）.

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Creep Analysis of Simply Supported-to-Continuous Box Girders Under Shear Lag Effect

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出版历程

目录

作者简介:
孙永新（1989—），男，甘肃张掖人，硕士生(E-mail: 391655098@qq.com);蔺鹏臻(1977—)，男，甘肃甘谷人，教授，博士（通讯作者. E-mail: pzhlin@mail.lzjtu.cn）.