[1]郭 琦,尹海军,贺拴海.混凝土梁桥钢筋工作应力释放法试验研究[J].西安建筑科技大学学报:自然科学版,2015,47(04):517-522.[doi:10.15986/j.1006-7930.2015.04.010]
　GUO Qi,YIN Haijun,HE Shuanhai.Study on stress release method of reinforced for concrete girder bridge[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2015,47(04):517-522.[doi:10.15986/j.1006-7930.2015.04.010]
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混凝土梁桥钢筋工作应力释放法试验研究()
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西安建筑科技大学学报:自然科学版[ISSN:1006-7930/CN:61-1295/TU]

卷:
47
期数:
2015年04期
页码:
517-522
栏目:
出版日期:
2015-08-31

文章信息/Info

Title:
Study on stress release method of reinforced for concrete girder bridge
文章编号:
1006-7930(2015)04-0517-6
作者:
郭 琦1; 2; 尹海军1; 2; 贺拴海2
1. 西安建筑科技大学土木工程学院，陕西 西安 710055；2. 长安大学旧桥检测与加固技术交通行业重点实验室，陕西 西安710064
Author(s):
GUO Qi1; 2; YIN Haijun1; 2; HE Shuanhai2
1. School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China; 2. Key Laboratory of Bridge Detection Reinforcement Technology of Ministry of Communication, Department of Highway Engineering , Chang’an University, Xi’an 710064, China
关键词:
桥梁工程; 构造钢筋; 应力释放初始应变; 峰值温度
Keywords:
bridge engineering;  constructional reinforced bar;  stress-free initial strain;  peak releasing temperature
分类号:
U446.3
DOI:
10.15986/j.1006-7930.2015.04.010
文献标志码:
A
摘要:
为更高精度地获取混凝土梁式桥当前的弯曲应力实际状态，采用相对匀质的普通构造钢筋进行了应力释放法研究．综合一维杆与薄圆盘导热方程，得到圆柱杆有限点上热传导解析解的可视化模型，重点确定混凝土梁式桥常见的构造钢筋类型、应力释放位置及释放峰值温度等影响因素．开展切割释放钢筋样本的室内模型构件试验，基于考虑切割释放温度场环境下温度应力修正模型得到了与各因素的理论变化规律一致的结论，表明文中建立的普通钢筋释放法的基础标准及释放温度修正模型方法正确、可靠．文中方法可获得更为客观的截面应力基础状态，为大跨度混凝土桥梁的延续健康监测奠定了基础．
Abstract:
In order to get the actual bending stress of concrete girder bridge, experimental study of stress release on constructional reinforced bar with relatively homogeneous physical properties were conducted. By combining thermal conduction equation of one-dimensional bar with that of the thin plate, a visual model of thermal conduction solution for cylindrical reinforced bar was got. Factors such as reinforced type, stress release position and the peak releasing temperature etc. were emphasized. Basic standards and amendment on releasing temperature method were studied in detail through indoor test on a large number of releasing samples. It is concluded that the amendment on distribution of releasing temperature worked in accordance with the theoretical one. Thus, the variation principle was verified correctly. It has great significance for the acquisition of on sectional stress state in a more practical way. Furthermore, it laid a foundation for the continuous health monitoring of large-span concrete bridges.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：2014-11-06 修改稿日期：2015-08-03
基金项目：国家自然科学基金项目(51108372)；陕西省自然科学基础研究计划项目(2015JM5195)；中央高校基本科研业务费基础研究计划科研平台开放基金项目(310821151109)；陕西省重点学科建设专项资金项目 (E01004)
作者简介：郭琦（1976-），男，副教授；研究方向：混凝土桥梁性能评估；E-mail：gq8558@126.com
更新日期/Last Update: 2015-10-30