（1 东南大学土木工程学院， 南京 210096； 2 中国建筑设计研究院， 北京 100044）

［摘要］为研究H型钢混凝土梁的受扭性能，以不同种类型钢及不同配筋方式为研究参数，完成了2根钢筋混凝土对比梁，6根H型钢混凝土梁的纯扭试验，分析了试件的受力过程、破坏形态等，研究了H型钢混凝土梁独特的裂缝开展与分布规律。试验和分析结果表明，钢筋及型钢对试件的开裂扭矩的提高作用可忽略不计，但在一定程度上提高了试件的极限扭矩，且型钢能显著改善试件开裂后的变形性能和后期抗扭刚度。

［关键词］型钢混凝土; 受扭性能; 开裂扭矩; 极限扭矩

中图分类号：TU398      文献标识码：A      文章编号：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

作者简介：朱筱俊，博士，高级工程师，一级注册结构工程师，Email：496380566@qq.com。

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