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（1建筑安全監(jiān)測北京市工程技術(shù)研究中心,北京 100044，2北京建筑工程學(xué)院,北京 100044）
[摘要]鋼筋與混凝土的高溫粘結(jié)性能是確定結(jié)構(gòu)構(gòu)件高溫下極限承載力、高溫后殘余承載力以及構(gòu)件修復(fù)加固設(shè)計(jì)的基礎(chǔ)。本文通過設(shè)計(jì)鋼筋中心拔出試驗(yàn)，研究了經(jīng)歷不同溫度后鋼筋和混凝土粘結(jié)性能的變異，分析和討論了鋼筋直徑、錨固長度、溫度等因素對混凝土與鋼筋粘結(jié)性能的影響。論文得到的相關(guān)結(jié)論對結(jié)構(gòu)構(gòu)件抗火設(shè)計(jì)和火災(zāi)后的加固研究具有一定的指導(dǎo)意義。
[關(guān)鍵詞]高溫;混凝土;鋼筋;粘結(jié)性能
中圖分類號：TU375 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2013)S1-1475-04
Research of bond performance between bars and concrete after exposed to high temperature
Tang Ruirui1,2, Xie Fudi1,2, Liu Dongdong1,2
(1 Beijing Engineering Research Center of Monitoring for Construction Safety, Beijing 100044, China;2 Beijing University of Civil Engineering and Architecture, Beijing 100044, China)
Abstract: An understanding of bonding performance between steel bar and concrete is the prerequisite for research of concrete's ultimate bearing capacity under high temperature, residual bearing capacity after high temperature and the structural member's repair and strengthening. In this paper, by way of a central pull-out test, the bond performance between bars and concrete after exposed to different high temperature were tested and investigated. Based on the measured bond stress after exposed to different high temperature, the influence of bar diameter, bond length, temperature etc. to bond behavior is analyzed and discussed. The corresponding conclusions in the paper have significance for structural member's fire-resistance design and strengthening after fire.
Keywords: high temperature; concrete; reinforce bar; bond
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