- 摘 要
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(西安建筑科技大學(xué)結(jié)構(gòu)工程與抗震教育部重點(diǎn)實(shí)驗(yàn)室,西安 710055)
[摘要]聯(lián)肢剪力墻中的洞口連梁一般為小跨高比連梁,這種連梁的受剪承載力計(jì)算目前尚未很好解決。根據(jù)9個(gè)沿梁截面高度布置三層封閉箍筋連梁的試驗(yàn)結(jié)果,分析了影響連梁破壞形態(tài)、位移延性系數(shù)和耗能比的因素。研究了連梁跨高比、截面尺寸、材料強(qiáng)度、箍筋數(shù)量和縱向鋼筋數(shù)量對(duì)其受剪承載力的影響。在此基礎(chǔ)上,通過多元回歸分析,建立了新配筋方案小跨高比連梁受剪承載力計(jì)算公式,提出了相應(yīng)的剪壓比限值。受剪承載力公式的預(yù)測(cè)值與試驗(yàn)值吻合良好。
[關(guān)鍵詞]小跨高比連梁;新配筋方案;受剪承載力;剪壓比限值
Calculation of shear capacity of new reinforcement scheme deep coupling beams
Li Fangyuan, Liang Xingwen, Zhang Tao(Xi′an University of Architecture and Technology, Key Lab of Structural Engineering and\=Earthquake Resistance, Ministry of Education, Xi′an 710055, China)
Abstract:Coupling beams in coupled shear walls are generally with small span-to-depth,and the shear capacity calculation method of which is not yet achieved suitably. Based on the results of 9 coupling beam specimens in which the stirrup was divided into three rings along the depth of the beam, primary factors affecting failure mode,displacement ductility coefficient and energy-dissipation ratio of coupling beam were analyzed; and span-to-depth,section size,material strength,amounts of stirrups and longitudinal reinforcement which affecting shear capacity of coupling beams were studied. On this basis, through multiple regression analysis,shear capacity formulae,upper limit of shear compression ratio were established for the new reinforcement scheme deep coupling beam. Predictive values of shear capacity of coupling beams agree well with the experimental data.
Keywords:coupling beam with small span-to-depth; new reinforcement scheme; shear capacity; shear compression ratio limit
國家自然科學(xué)基金資助項(xiàng)目(50678146)。
作者簡介:李方圓,博士研究生,副教授,Email:fangyuanli@yahoo.cn。
參考文獻(xiàn)
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