Loading capacity of composite slim frame beams

Abstract The estimation of the flexural stiffness and bending capacity of composite slim beams is rather complicated, because the influence of many factors should be taken into account. These factors include variable section dimensions, development of cracks and non-linear characteristics of concrete. This is especially true for the composite slim frame beam, in which the sagging moment region and the hogging moment region should both be considered. In this paper, experimental investigations have been conducted to investigate the flexural behavior of two specimens of composite slim frame beam with deep deck under monotonic loading. Based on the experimental results, formulas of calculating the bending capacity and flexural stiffness in the hogging moment region of the slim beam with deep deck has been proposed. Combining these formulas with existing formulas of sagging moment, formulas for the equivalent stiffness and the design method of the frame slim beam have been developed. The feasibility of the proposed formulas and design method has been verified by the test results.

[1]  Il-Sang Ahn,et al.  Proposed Effective Width Criteria for Composite Bridge Girders , 2007 .

[2]  W. Sha.  Fire resistance of protected asymmetric slim floor beams , 2001 .

[3]  R. M. Lawson,et al.  Slimflor and slimdek construction : European developments , 1999 .

[4]  Jörg Lange.  Design of Edge Beams in Slim Floors Using Precast Hollow Core Slabs , 2006 .

[5]  Wei Sha.  Fire resistance of slim floors protected using intumescent coatings , 2001 .

[6]  Zhongcheng Ma,et al.  Structural behaviour of composite slim floor frames in fire conditions , 2006 .

[7]  R. M. Lawson,et al.  Design Considerations for Composite Beams Using Precast Concrete Slabs , 2006 .

[8]  Chen Quan.  Loading capacity of composite slim beam in the sagging moment region , 2004 .

[9]  M. Fontana,et al.  Brandverhalten von Slim-Floor-Decken mit vorgespannten Betonhohlplatten , 1998 .

[10]  R. M Lawson,et al.  Design of asymmetric ‘slimflor’ beams , 1998 .

[11]  Mikko Malaska.  Behaviour of a semi-continuous beam-column connection for composite slim floors , 2000 .

[12]  Colin Bailey.  Large Scale Fire Test on a Composite Slim-floor System , 2003 .

[13]  Zhongcheng Ma,et al.  Fire resistance of composite slim floor beams , 2000 .

[14]  I M Viest,et al.  COMPOSITE CONSTRUCTION FOR I-BEAM BRIDGES , 1953 .

[15]  Colin Bailey.  The behaviour of asymmetric slim floor steel beams in fire , 1999 .

[16]  Mario Fontana,et al.  Structural Behaviour of Slim Floor Slabs with Prestressed Hollow Core Elements at Room Temperature and in Fire , 2002 .

[17]  Il-Sang Ahn,et al.  Effective Slab Width Definition for Negative Moment Regions of Composite Bridges , 2007 .