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（1 河南城建學(xué)院土木與交通工程學(xué)院， 平頂山 467000； 2 湖南大學(xué)土木工程學(xué)院， 長(zhǎng)沙 410082）

［摘要］以國(guó)內(nèi)外既有方形中柱節(jié)點(diǎn)試驗(yàn)數(shù)據(jù)作為評(píng)估樣本，對(duì)比分析國(guó)內(nèi)外設(shè)計(jì)規(guī)范關(guān)于板柱節(jié)點(diǎn)抗沖切承載力計(jì)算和規(guī)定的差異。基于對(duì)樣本的回歸分析，提出形式簡(jiǎn)單的無腹筋板沖切承載力建議計(jì)算公式，結(jié)果表明，預(yù)測(cè)值與樣本吻合較好。最后提出了無腹筋板柱節(jié)點(diǎn)抗沖切承載力的建議計(jì)算公式，為我國(guó)相關(guān)規(guī)范的編寫提供參考。

［關(guān)鍵詞］板柱節(jié)點(diǎn)； 沖切承載力； 配筋率； 回歸分析

中圖分類號(hào)：TU375-2文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)13-0120-04

Calculation and study on punching bearing capacity of slab-column joints without shear reinforcement

Zhao Jin1,2, Yi Weijian2

(1 School of Civil and Transportation Engineering, Henan University of Urban Construction, Pingdingshan 467000, China; 2 College of Civil Engineering, Hunan University, Changsha 410082, China)

Abstract:The test data of the square pillars at home and abroad were taken as the evaluation samples, and the differences between the domestic and foreign design specifications on punching bearing capacity of the slab-column joints were compared and analyzed. Based on the regression analysis of the sample, a formula for calculating the punching  bearing capacity of slab without shear reinforcement was proposed. The results show that the predicted value agrees well with the sample. Finally, the proposed calculation formula for the punching  bearing capacity of slab-column joints without shear reinforcement was proposed, which provides a reference for the preparation of relevant specifications in China.

Keywords:slab-column connection; punching bearing capacity; reinforcement ratio; regression analysis