箱形型钢混凝土梁复合受扭性能试验

张根俞1，梁书亭2，朱筱俊2，邢净净2（1 中国建筑设计研究院，北京 100044； 2 东南大学土木工程学院，南京 210096）

［摘要］通过5根箱形型钢混凝土梁的复合受扭性能试验，详细描述了试件在不同扭弯比作用下的加载过程。试验表明，箱形型钢混凝土梁在复合受力情况下，出现扭转型或弯曲型两种破坏形态；扭弯比是影响弯、扭破坏形态的重要因素；适当的弯矩存在能显著提高型钢混凝土梁的抗扭强度。通过对试验数据分析得到的箱形型钢混凝土梁的弯扭相关方程，可为其设计提供参考和依据。

［关键词］型钢混凝土；扭弯比；扭转型破坏；弯曲型破坏；弯扭相关方程

中图分类号：TU398文献标识码：A文章编号：1002-848X(2011)01-0014-05

Experimental research on combined torsional behavior of box-shaped steel reinforced concrete beams

Zhang Genyu1, Liang Shuting2, Zhu Xiaojun2, Xing Jingjing2

（1 China Architectural Design & Research Group, Beijing 100044, China;

 2 College of Civil Engineering,Southeast University, Nanjing 210096, China）

Abstract:After experimental research on five box-shaped steel reinforced concrete(BSRC) beams under combined bending and torsion, the loading processes of the test members under different torsion-bending moment ratios were described in detail. Test and analysis results indicate that two failure modes (torsional failure mode and bending failure mode) may happen when BSRC beams are subjected to combined bending and torsion, the torsion-bending moment ratio is the key factor that decides the failure mode, and the ultimate torsion moment can be increased significantly by the existence of an appropriate bending moment. A bending-torsion correlation equation in three-phase expression form of the BSRC beams was put forward, which could serve as a valuable reference and basis for designing of BSRC beams.

Keywords:steel reinforced concrete; torsion-bending moment ratio; torsional failure mode; bending failure mode; bending-torsion correlation equation

*东南大学国家自然科学基金预研项目（KJ2009253）。

作者简介：张根俞，博士，Email：genyuzhang@gmail.com。

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