- 摘 要
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（西安建筑科技大學(xué)土木工程學(xué)院, 西安 710055）
［摘要］以梁柱組合件為研究對象，分析了由于梁縱筋屈服應(yīng)變向節(jié)點區(qū)擴展而引起的節(jié)點附加應(yīng)變，計算了節(jié)點區(qū)混凝土的主拉應(yīng)變，并依據(jù)主拉應(yīng)變確定了節(jié)點區(qū)混凝土抗壓強度折減系數(shù)。在此基礎(chǔ)上，采用斜壓桿-桁架模型，建立了考慮節(jié)點變形的梁柱節(jié)點受剪承載力計算模型，模型計算結(jié)果與試驗結(jié)果較為吻合。
［關(guān)鍵詞］RC梁柱節(jié)點; 節(jié)點變形; 受剪承載力; 應(yīng)變擴展
中圖分類號：TU375.4 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2014)11-0086-04
A calculation model for shear bearing capacity of beam-column joints considering joint deformation
Wang Hai, Liang Xingwen, Wang Yingjun
(School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China)
Abstract: Taking the beam-column composite member as the research object, the joint additional strain, which is induced by the yield strain of longitudinal reinforcement of the beam expanding to the joint region, was analyzed. The primary tensile strain of the concrete in the joint region was calculated and the reduction coefficient of concrete compression strength in the joint region based on this calculation was determined. On this basis, the model of arch-truss was used to establish the calculation model for the shear bearing capacity of the beam-column joint considering the joint shear deformation. The calculation results agree well with the experimental results.
Keywords: reinforced concrete beam-column joint; joint deformation; shear bearing capacity; strain extension
*國家自然科學(xué)基金項目（51278402，51078305）。
作者簡介：王海，碩士研究生，Email:ronwanghai@gmail.com。
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