钢-混凝土组合暗梁试验研究
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摘要
为了研究一种新型钢-混凝土组合暗梁的受力性能,并考察型钢截面尺寸对组合暗梁抗弯刚度和受弯承载力的影响,对2根简支钢-混凝土组合暗梁进行试验研究。试验结果表明:钢-混凝土组合暗梁整体工作性能良好,型钢与混凝土之间的相对滑移很小,可忽略不计。极限破坏状态时,组合暗梁跨中截面的挠度很大,说明组合暗梁具有良好的延性。此外,型钢的截面尺寸对钢-混凝土组合暗梁的抗弯刚度和受弯承载力有显著的影响。在试验研究的基础上,提出了钢-混凝土组合暗梁抗弯刚度和塑性受弯承载力的计算方法,理论值与试验值吻合很好。
In order to investigate the mechanical properties of a new type of composite hidden beam and the effect of different sectional dimensions of the joists on the flexural stiffness and the flexural capacity,an experimental study on two simply-supported composite hidden beams was conducted. The results showed that the composite hidden beam worked efficiently as a whole and the relative slip between the joist and the concrete slab was small,which could be neglected. At the ultimate failure state,the deflection in the mid-span was large,which indicated a good ductility performance of the composite hidden beam. In addition,the sectional dimension of steel joist had a significant impact on the flexural rigidity and the bearing capacity of composite hidden beams. Based on the experimental investigation,the formulas for calculating the flexural stiffness and the plastic flexural capacity were proposed respectively and the calculated values of both formulas were well coincided with the test results.
In order to investigate the mechanical properties of a new type of composite hidden beam and the effect of different sectional dimensions of the joists on the flexural stiffness and the flexural capacity,an experimental study on two simply-supported composite hidden beams was conducted. The results showed that the composite hidden beam worked efficiently as a whole and the relative slip between the joist and the concrete slab was small,which could be neglected. At the ultimate failure state,the deflection in the mid-span was large,which indicated a good ductility performance of the composite hidden beam. In addition,the sectional dimension of steel joist had a significant impact on the flexural rigidity and the bearing capacity of composite hidden beams. Based on the experimental investigation,the formulas for calculating the flexural stiffness and the plastic flexural capacity were proposed respectively and the calculated values of both formulas were well coincided with the test results.
引文
[1]Bode H,Dorka U E,Stengel J,et al.Composite Action in Slim Hidden Systems[C]∥Proceedings of the Engineering Foundation Conference,1997:472-485.
[2]Siokola W,Ringsmuth E.Trapezblechbogen-Verbunddecke Eine Altbekannte Bauweise Mit Modernen Baustoffen Neu Entdeckt[J].Stahlbau Rundschau,1997,89:33-34.
[3]Koichi B.Study on Elastic and Plastic Response Analysis of Framed Structure with Slim Beams[R].UK:The Steel Construction Institute,1997.
[4]Mullett D L.Slim Hidden Design and Construction[R].UK:The Steel Construction Institute,1995.
[5]王元清,石永久,陈全,等.钢-混凝土组合扁梁承载力性能的试验研究[J].土木工程学报,2005,38(4):12-17.
[6]GB 50010—2010混凝土结构设计规范[S].
[2]Siokola W,Ringsmuth E.Trapezblechbogen-Verbunddecke Eine Altbekannte Bauweise Mit Modernen Baustoffen Neu Entdeckt[J].Stahlbau Rundschau,1997,89:33-34.
[3]Koichi B.Study on Elastic and Plastic Response Analysis of Framed Structure with Slim Beams[R].UK:The Steel Construction Institute,1997.
[4]Mullett D L.Slim Hidden Design and Construction[R].UK:The Steel Construction Institute,1995.
[5]王元清,石永久,陈全,等.钢-混凝土组合扁梁承载力性能的试验研究[J].土木工程学报,2005,38(4):12-17.
[6]GB 50010—2010混凝土结构设计规范[S].