高温后钢筋与聚合物水泥砂浆黏结性能研究

邓军; 黄海帆; 谢燕; 陈建华

doi:10.13204/j.gyjzG20102907

高温后钢筋与聚合物水泥砂浆黏结性能研究

doi: 10.13204/j.gyjzG20102907

1. 广州大学土木工程学院, 广州 510006;
2. 广东工业大学土木与交通工程学院, 广州 510006

详细信息

作者简介:
邓军,男,1975年出生,博士,教授。电子信箱:dengjun@gzhu.edu.cn

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- 文章访问数: 176
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- PDF下载量: 10
- 被引次数: 0
出版历程
- 收稿日期: 2020-10-29
- 网络出版日期: 2021-09-16
- 刊出日期: 2021-09-16

RESEARCH ON BONDING PERFORMANCE BETWEEN REBAR AND POLYMER CEMENT MORTAR AFTER BEING SUBJECTED TO HIGH TEMPERATURES

1. School of Civil Engineering, Guangzhou University, Guangzhou 510006, China;
2. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China

摘要

摘要: 聚合物水泥砂浆（PCM）因与混凝土良好的黏结性被广泛应用于钢筋混凝土结构加固，但高温下PCM与钢筋的黏结性能退化规律尚不明确。对不同高温和冷却方式的钢筋与PCM黏结性能进行了试验研究。结果表明：1）自然冷却下破坏模式为劈裂和劈裂拔出的试件，对应泡水冷却试件的破坏模式为劈裂拔出和拔出；2）冷却方式对黏结强度的影响随温度上升而增大；3）冷却方式不同会导致试件不同的破坏形式，影响试件的滑移量；4）随着温度的升高，试件的黏结强度随之下降，滑移量随之上升。并根据试验结果建立了钢筋-PCM黏结强度高温退化模型，为实际工程提供参考。
- 聚合物水泥砂浆 /
- 黏结性能 /
- 加热温度 /
- 冷却方式 /
- 刚度退化
Abstract: Polymer cement mortar (PCM) has been widely used in the reinforcement of reinforced concrete structure because of its good bond with concrete, but the law of bond degradation between PCM and rebar at high temperatures is still unclear. Experimental studies were conducted on the bonding properties of rebar and PCM under different temperatures and cooling methods. The results showed that:1) the failure modes of the specimens under natural cooling were split and split pull-out, and the corresponding failure modes of the water-cooled specimens were split pull-out and pulled out; 2)the influence of cooling mode on bond strength increased with the increase of temperature; 3)different cooling methods would lead to different failure forms of specimens, which would affect the slip amount of specimens; 4)with the increases of temperature, the bond strength of the specimen decreased and the slip amount increased. According to the experimental results, the high temperature degradation model of rebar-PCM bond strength was established, which could provide a reference for practical engineering.
- PCM /
- bonding performance /
- heating temperature /
- cooling method /
- stiffness degradation

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参考文献(15)

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