考虑钢筋锈蚀的复合受扭混凝土箱梁时变承载力研究

程坤; 项贻强

doi:10.6052/j.issn.1000-4750.2015.01.0047

考虑钢筋锈蚀的复合受扭混凝土箱梁时变承载力研究

程坤^1,2,
项贻强^1,

1.
浙江大学土木工程系, 浙江, 杭州 310058;
2.
河南省交通科学技术研究院有限公司, 河南, 郑州 450006

基金项目: 国家自然科学基金项目（51178416）；浙江大学唐仲英基金资助项目

详细信息

作者简介:
程坤(1987-),男,河南商丘人,工程师,工学博士,从事桥梁全寿命理论研究(E-mail:chengkun812@163.com).

通讯作者:
项贻强(1959-),男,浙江杭州人,教授,博士,中国土木工程学会桥梁与结构工程分会理事,主要从事桥梁结构全寿命设计理论、健康监测与养护管理、风险评估、悬浮隧道及古桥的保护研究(E-mail:xiangyiq@zju.edu.cn).

中图分类号: TU375
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出版历程
- 收稿日期: 2015-01-15
- 修回日期: 2016-04-12
- 刊出日期: 2016-09-24

STUDY ON TIME-DEPENDENT LOAD CARRYING CAPACITY OF CONCRETE BOX BEAMS SUBJECTED TO COMBINED TORSION CONSIDERING REINFORCEMENT CORROSION

CHENG Kun^1,2,
XIANG Yi-qiang^1,

1.
Department of Civil Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China;
2.
Henan Transportation Research Institute Co., Ltd., Zhengzhou, Henan 450006, China

More Information

Corresponding author:
XIANG Yi-qiang: 10.6052/j.issn.1000-4750.2015.01.0047

摘要

摘要: 对考虑钢筋锈蚀的复合受扭钢筋混凝土箱梁时变承载力进行研究。针对复合受扭混凝土箱梁中混凝土开裂面与钢筋斜交的情况，推导了综合考虑钢筋混凝土粘结滑移效应及正交配筋效应的钢筋修正本构模型。引入钢筋和混凝土材料的时变劣化模型，结合复合受扭钢筋混凝土箱梁的修正板-桁架模型，编制了复合受扭钢筋混凝土箱梁时变承载力的计算程序。与纯扭锈蚀构件和复合受扭构件的试验对比，验证了所提出钢筋修正本构模型的适用性较好。算例结果表明：在假定的一般大气环境和受力条件下，考虑钢筋锈蚀的复合受扭钢筋混凝土箱梁构件100年后抗扭强度降低约15%。
- 混凝土箱梁 /
- 复合受扭 /
- 钢筋锈蚀 /
- 时变 /
- 承载力
Abstract: Time-dependent load carrying capacity of reinforced concrete (RC) box beams subjected to combined torsion by considering reinforcement corrosion is investigated in this paper. A modified constitutional relationship for reinforcement is derived by considering that the crack surface is not perpendicular to steel bar, as well as the bond slip effect between steel bar and concrete. Introducing the time-dependent degradation models of reinforcement and concrete, combined with a modified plate-truss model, the calculation for studying the time-dependent carrying capacity of RC box beams subjected to combined torsion is carried out. The test results of pure and combined torsional RC members verify the applicability of the modified constitutional relationship. The numerical results show that the torsional strength of the calculated corroded RC box beam model will decrease by approximately 15% after 100 years under the assumed environment and loading conditions.
- concrete box beam /
- combined torsion /
- reinforcement corrosion /
- time dependent /
- load carrying capacity

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