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鋼筋混凝土偏心受壓柱的受剪承載力研究*
徐潔,梁興文,李方圓
摘 要

(西安建筑科技大學(xué)土木工程學(xué)院, 西安 710055

 

摘要]基于主拉應(yīng)力強(qiáng)度準(zhǔn)則,通過(guò)理論分析給出了混凝土和軸向壓力的受剪貢獻(xiàn),采用45°桁架理論估計(jì)箍筋的受剪貢獻(xiàn),提出了鋼筋混凝土柱受剪承載力理論公式。根據(jù)搜集到的86組鋼筋混凝土柱受剪性能試驗(yàn)數(shù)據(jù),對(duì)理論公式的精確性進(jìn)行校核,發(fā)現(xiàn)理論公式計(jì)算值比試驗(yàn)值偏高。然后運(yùn)用非線性回歸方法對(duì)理論公式進(jìn)行修正,修正后的鋼筋混凝土柱受剪承載力計(jì)算公式計(jì)算值與試驗(yàn)值吻合較好。最后提出了具有一定安全儲(chǔ)備的受剪承載力計(jì)算公式和相應(yīng)的設(shè)計(jì)公式。

關(guān)鍵詞]鋼筋混凝土柱; 受剪承載力; 非線性回歸

中圖分類號(hào):TU375.3      文獻(xiàn)標(biāo)識(shí)碼:A      文章編號(hào):1002-848X(2014)01-0049-04

 

Shear strength of eccentrical compression reinforced concrete column

Xu Jie, Liang Xingwen, Li Fangyuan

(School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China)

 

Abstract: Based on the principal tensile stress strength criterion, the shear contribution of concrete and axial compressive force was built by theoretical analysis, and that of stirrups was estimated using 45° truss theoretical model, therefore the theoretical formula of shear strength of reinforced concrete column was proposed. According to 86 test datum of shear performance of reinforced concrete columns, the accuracy of the theoretical formula was checked. The calculated results show that the calculation values of theoretical formula are higher than that of the experiment. So the theoretical formula was revised by using non-linear regression method. Formula value of the amended shear strength of reinforced concrete column is in good agreement with the experimental results. Finally, the shear strength formula with a certain safety reserves and the corresponding design formula were established.

Keywords: reinforced concrete column; shear strength; non-linear regression

*國(guó)家自然科學(xué)基金資助項(xiàng)目(51278402, 51078305)

作者簡(jiǎn)介:徐潔,碩士研究生,Email: xujie.19871116@163.com。

 

參考文獻(xiàn)

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