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（湖南大學(xué)土木工程學(xué)院， 長(zhǎng)沙 410082）

［摘要］通過(guò)在加載柱頭施加偏心荷載來(lái)模擬板柱結(jié)構(gòu)局部節(jié)點(diǎn)失效后相鄰節(jié)點(diǎn)在附加剪力和不平衡彎矩共同作用下的受力工況，對(duì)中柱節(jié)點(diǎn)沖切破壞前、后的試驗(yàn)現(xiàn)象及試驗(yàn)結(jié)果進(jìn)行對(duì)比分析；此外，試驗(yàn)還選取縱向鋼筋配筋率、穿柱鋼筋布置方式為研究參數(shù)，對(duì)偏心荷載作用下板柱節(jié)點(diǎn)抗沖切以及沖切破壞后的受力性能和破壞機(jī)理進(jìn)行研究；最后，采用規(guī)范計(jì)算公式對(duì)試件承載力進(jìn)行預(yù)測(cè)并與試驗(yàn)結(jié)果進(jìn)行對(duì)比。研究成果可為板柱結(jié)構(gòu)抗連續(xù)倒塌設(shè)計(jì)提供參考。

［關(guān)鍵詞］中柱節(jié)點(diǎn)； 抗連續(xù)倒塌； 穿柱鋼筋； 偏心荷載； 不平衡彎矩； 沖切破壞后承載力

中圖分類號(hào)：TU375.2文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2016)02-0001-07

Experimental research on post-punching properties of interior slab-column

connections subjected to eccentric load

Yi Weijian, Zhao Jin, Zhu Zehua

(College of Civil Engineering, Hunan University, Changsha 410082, China)

Abstract:The results of an experimental and analytical study of interior slab-columns connections subjected to punching failure in the presence of the extra shear force and an unbalanced moment were presented, which characterized in the study by an eccentric load on the column. Moreover, the Pre-punching and post-punching behavior and failure mechanism of slab-column connections with various longitudinal reinforcement ratio and the integrity reinforcement layout was  studied under eccentric load action. In the end, a comparison with the predictions of the formulas proposed by codes and the experimental results was presented. Research results obtained may serve as a reference for making a rational design of anti-progressive-collapse structures.

Keywords:interior slab-column connection; anti-progressive-collapse; integrity reinforcement; eccentric load； unbalanced moment;  post-punching strength

* 國(guó)家自然科學(xué)基金項(xiàng)目（51178175，51338004）。

作者簡(jiǎn)介：易偉建，博士，教授，博士生導(dǎo)師，Email：wjyi@hnu.edu.cn。