火灾（高温）下植筋试件拉拔承载力试验研究

Experimental Study on the Pullout Strength of Bonded Rebar Under Fire (High Temperature)

作者：刘长青(同济大学结构工程与防灾研究所，上海 200092)；陆洲导(同济大学结构工程与防灾研究所，上海 200092)；李占鸿(上海市房地产科学研究院，上海 200031)；徐微平(同济大学结构工程与防灾研究所，上海 200092)

Author：Liu Changqing(Research Inst. of Structural Eng. and Disaster Reduction, Tongji Univ., Shanghai 200092,China)；Lu Zhoudao(Research Inst. of Structural Eng. and Disaster Reduction, Tongji Univ., Shanghai 200092,China)；Li Zhanhong(Shanghai Real-estate Science Research Institute,Shanghai 200031,China)；Xu Weiping(Research Inst. of Structural Eng. and Disaster Reduction, Tongji Univ., Shanghai 200092,China)

收稿日期：2008-12-02 年卷（期）页码：2010,42(1):74-79

期刊名称：工程科学与技术

Journal Name：Advanced Engineering Sciences

关键字：植筋；高温；植筋深度；拉拔承载力

Key words：bonded rebar; high temperature; embedment depth; pullout strength

基金项目：国家自然科学基金资助项目（50778134）;德国慧鱼集团资助项目

中文摘要

为了研究植筋试件在火灾（高温）下的力学性能，设计制作了25个植筋试件进行高温下拉拔试验。考虑10 d和15 d两种植筋深度，试验中记录了混凝土内部温度、钢筋位移以及拉拔力，并对常温和高温下具有相同植筋深度植筋试件拉拔承载力进行分析。试验结果表明：温度对植筋试件承载力有很大影响，随着温度的升高，植筋试件的拉拔承载力显著下降；当温度高于350 ℃后，高温下植筋试件的承载力约为常温下的10%~20%

英文摘要

In order to investigate the working behaviors of bonded rebar under fire (high temperature), 25 specimens were designed for the test of pullout strength including those working in the ambient circumstance.Two embedment depths (10 d, 15 d) were considered. Records were made on the temperatures inside the specimens,bonded rebar displacements and the pullout strengths. The pullout strengths of 10 d and 15 d specimens at different temperatures were analyzed and contrasted the pullout strength of 15 d specimens with that of 10 d specimens at the same temperature.The tests showed that the pullout strength decreases when the specimen is under high temperature. Especially, when the temperature is above 350 ℃, the pullout strength is about 10%~20% that of the ambient circumstance.

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论文摘要

火灾（高温）下植筋试件拉拔承载力试验研究

Experimental Study on the Pullout Strength of Bonded Rebar Under Fire (High Temperature)