超低温下钢筋与混凝土粘结性能试验研究

doi:10.7522/j.issn.1000-0240.2014.0075

冰川冻土 ›› 2014, Vol. 36 ›› Issue (3): 626-631.doi: 10.7522/j.issn.1000-0240.2014.0075

超低温下钢筋与混凝土粘结性能试验研究

谢剑^1,2, 李海瑞¹, 李会杰¹

1. 天津大学建筑工程学院土木工程系, 天津 300072;
2. 天津大学滨海土木工程结构与安全教育部重点实验室, 天津 300072

收稿日期:2013-11-12 修回日期:2014-02-02 出版日期:2014-06-25 发布日期:2014-07-16
作者简介:谢剑（1974-），男，河北石家庄人，副教授，2005年在天津大学获博士学位，现主要从事混凝土基本理论研究.E-mail:xiejian@tju.edu.cn
基金资助:
国家自然科学基金项目（51078260）资助

Experiment on bonding properties between reinforcement and concrete at 20℃ to -165℃

XIE Jian^1,2, LI Hairui¹, LI Huijie¹

1. Department of Civil Engineering, Tianjin University, Tianjin 300072, China;
2. Key Laboratory of Coast Civil Structure Safety, Ministry of Education, Tianjin University, Tianjin 300072, China

Received:2013-11-12 Revised:2014-02-02 Online:2014-06-25 Published:2014-07-16

摘要/Abstract

摘要： 为了探究超低温下钢筋混凝土的粘结锚固性能，考虑从20~-165℃温度下，不同钢筋直径、保护层厚度、锚固长度以及钢筋型号等参数的影响，通过拉拔试验，对超低温条件下钢筋与混凝土粘结锚固破坏特征和粘结性能进行了研究. 结果表明：钢筋与混凝土的粘结性能受低温影响显著；随着温度的降低，极限粘结强度有增大的趋势，在-80~-120℃时极限粘结强度值达到最大；低温粘结强度提高系数随着相对保护层厚度的增大而减小，且基本呈线性；锚固长度和钢筋型号对低温粘结强度影响较小.

关键词: 超低温, 粘结性能, 粘结强度, 拔出试验

Abstract: In order to research bonding properties of reinforced concrete at low temperatures, bonding properties between reinforcing bar and concrete at 20℃ to-165℃ were analyzed by pullout tests, considering the parameters such as temperature, bar diameter, concrete cover thickness, anchoring length and yield strength of rebar. The experimental studies indicate that the bonding properties are significantly depended on temperature. The bonding strength increases linearly with temperature decrease, and reaching the maximum at -80℃ to -120℃. What's more, the enhancing coefficient of bonding strength decreases linearly with relative cover thickness. Finally, other parameters, such as anchoring length and yield strength of steel, have little effect.

Key words: low temperatures, bonding properties, bonding strength, pullout test

中图分类号:

TU502

谢剑, 李海瑞, 李会杰. 超低温下钢筋与混凝土粘结性能试验研究[J]. 冰川冻土, 2014, 36(3): 626-631.

XIE Jian, LI Hairui, LI Huijie. Experiment on bonding properties between reinforcement and concrete at 20℃ to -165℃[J]. JOURNAL OF GLACIOLOGY AND GEOCRYOLOGY, 2014, 36(3): 626-631.

参考文献

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超低温下钢筋与混凝土粘结性能试验研究

Experiment on bonding properties between reinforcement and concrete at 20℃ to -165℃

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