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（1 東南大學(xué)土木工程學(xué)院， 南京 210096； 2 中國建筑設(shè)計(jì)研究院， 北京 100044）

［摘要］為研究H型鋼混凝土梁的受扭性能，以不同種類型鋼及不同配筋方式為研究參數(shù)，完成了2根鋼筋混凝土對(duì)比梁，6根H型鋼混凝土梁的純扭試驗(yàn)，分析了試件的受力過程、破壞形態(tài)等，研究了H型鋼混凝土梁獨(dú)特的裂縫開展與分布規(guī)律。試驗(yàn)和分析結(jié)果表明，鋼筋及型鋼對(duì)試件的開裂扭矩的提高作用可忽略不計(jì)，但在一定程度上提高了試件的極限扭矩，且型鋼能顯著改善試件開裂后的變形性能和后期抗扭剛度。

［關(guān)鍵詞］型鋼混凝土; 受扭性能; 開裂扭矩; 極限扭矩

中圖分類號(hào)：TU398      文獻(xiàn)標(biāo)識(shí)碼：A      文章編號(hào)：1002-848X(2014)09-0022-07

Experimental research and theoretical analysis on torsional behavior of H-shaped steel encased reinforced concrete beams

Zhu Xiaojun1, Zhang Genyu2, Liang Shuting1

（1 College of Civil Engineering, Southeast University, Nanjing 210096, China; 2 China Architectural Design & Research Group, Beijing 100044, China）

Abstract: In order to research the torsional behavior of H-shaped steel encased reinforced concrete（SRC）beams, experiments were conducted on two RC beams and six H-shaped SRC beams with various reinforcing bar and different kinds of steel subjected to pure torsion. The performance, such as loading process, failure mechanism, was analyzed. Unique crack development process and distribution were studied. Test and analysis results show that the improvement of reinforcing bar and steel on cracking torque could be neglected, but can raise the ultimate torque to a certain degree, and have remarkable improvement on the deformation after cracking and torsional rigidity.

Keywords: steel encased reinforced concrete; torsional behavior; cracking torque; ultimate torque

作者簡介：朱筱俊，博士，高級(jí)工程師，一級(jí)注冊結(jié)構(gòu)工程師，Email：496380566@qq.com。

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