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(1 西安建筑科技大學(xué)土木工程學(xué)院，西安 710055； 2 青島理工大學(xué)土木工程學(xué)院，青島 266033)

［摘要］以軸壓比和相對(duì)偏心距為參數(shù)，對(duì)8根高強(qiáng)鋼筋混凝土壓彎剪構(gòu)件在單調(diào)扭矩作用下的性能進(jìn)行了試驗(yàn)研究，探討了試件裂縫的產(chǎn)生和發(fā)展、破壞特征以及影響裂縫傾角和開(kāi)裂扭矩的因素。推導(dǎo)出了壓彎剪復(fù)合受扭構(gòu)件開(kāi)裂扭矩的計(jì)算公式，與試驗(yàn)結(jié)果進(jìn)行對(duì)比，計(jì)算值與試驗(yàn)值吻合較好，為高強(qiáng)混凝土復(fù)合受扭構(gòu)件開(kāi)裂扭矩的計(jì)算和設(shè)計(jì)提供了參考。

［關(guān)鍵詞］復(fù)合受扭；高強(qiáng)混凝土；開(kāi)裂扭矩；裂縫傾角

Experimental study of cracking performance of high-strength reinforced concrete members subjected to combined torsion

Men Jinjie1, Shi Qingxuan1, Liu Jiming2, Li Jiafu2

(1 College of Civil Engineering，Xi′an University of Architecture and Technology，Xian 710055, China;2 College of Civil Engineering，Qingdao Technological University，Qingdao 266033, China)

Abstract:Cracking performance of high-strength reinforced concrete members subjected to axial compression, shear and torque is studied. Based on the experiment of 8 combined torsion specimens, the cracking, the failure modes of the member are analyzed. It is shown that the axial stress level and relative eccentricity have greatly effect on the angle of cracks and cracking torque of members. A practical formula of cracking torque is concluded for the member subjected to axial compression, shear and torque. It can be proved that the formula agrees well with the results of experiment and can provide valuable reference for design of combined torsion members.

Keywords:combined torsion; high-strength concrete; cracking torque; the angle of cracks

*教育部博士點(diǎn)基金項(xiàng)目(20060703008)。

作者簡(jiǎn)介：門(mén)進(jìn)杰，博士，講師，Email:men2008@sohu.com。