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粘鋼加固軸心受壓鋼筋混凝土柱的利用率及可靠度分析
杜斌,趙人達(dá),向天宇
摘 要

(西南交通大學(xué)土木工程學(xué)院,成都 610031)
[摘要]根據(jù)我國(guó)《混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范》(GB50010—2002)和《混凝土結(jié)構(gòu)加固設(shè)計(jì)規(guī)范》(GB50367—2006)中假定的混凝土應(yīng)力-應(yīng)變關(guān)系和極限應(yīng)變值,推導(dǎo)了粘貼鋼板能被充分利用的界限條件;得到了粘鋼加固鋼筋混凝土軸心受壓柱的承載能力計(jì)算公式,并由此建立了粘鋼加固鋼筋混凝土柱的極限狀態(tài)方程,通過(guò)一次二階矩法計(jì)算了由使用功能改變引起的粘鋼加固柱的可靠度指標(biāo),計(jì)算結(jié)果表明按此極限狀態(tài)方程設(shè)計(jì)的粘鋼加固混凝土柱的可靠度滿足《建筑結(jié)構(gòu)可靠度設(shè)計(jì)統(tǒng)一標(biāo)準(zhǔn)》(GB50068—2001)的要求。
[關(guān)鍵詞]粘鋼加固;粘鋼利用率;軸心受壓柱;可靠度指標(biāo)
Utilization level and reliability analysis of reinforced concrete columns strengthened by externally bonded steel plates under axial compression
Du Bin, Zhao Renda, Xiang Tianyu(College of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China)
Abstract:Based on the stress-strain relationship and limit strain value of concrete presented in Code for design of concrete structures (GB50010—2002)and Design code for strengthening concrete structures (GB50367—2006),the boundary conditions of the full utilization of the externally bonded steel plates were derived. The formulas of bearing capacity of reinforced concrete columns strengthened by externally bonded steel plates under axial compression were proposed, the limit state equation was established, and the reliability index of reinforced concrete columns strengthened by externally bonded steel plates due to increased loads was calculated with first order second moment. It was shown that the reliability designed by this method could meet the demands of Unified standard for reliability design of building structures(GB50068—2001).
Keywords:externally bonded steel plates strengthening; utilization level; columns under axial compression; reliability
作者簡(jiǎn)介:杜斌,博士研究生,Email:bindu1982@163.com。
參考文獻(xiàn)
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[6]貢金鑫,趙國(guó)藩,柳林.鋼筋混凝土軸心受壓構(gòu)件加固后的可靠度分析[J].建筑結(jié)構(gòu),2000,30(3):29-33.
[7]GB50010—2002 混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范[S]. 北京:中國(guó)建筑工業(yè)出版社,2002.
[8]GB50367—2006 混凝土結(jié)構(gòu)加固設(shè)計(jì)規(guī)范[S]. 北京:中國(guó)建筑工業(yè)出版社,2006.
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[10]GB50068—2001 建筑結(jié)構(gòu)可靠度設(shè)計(jì)統(tǒng)一標(biāo)準(zhǔn)[S].北京:中國(guó)計(jì)劃出版社,2001.

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