International journal of steel structures (국제강구조저널)

Korean Society of Steel Construction (한국강구조학회)
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Mechanism of Elasto-Plastic Behavior of Composite Beam Connected to RHS Column

  • Received : 2015.04.30
  • Accepted : 2016.07.05
  • Published : 2016.09.30
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Abstract

Following to the experimental test of full-scale beam-to-RHS column sub-assemblies, it was observed that in the composite beam considerable reduction of rotation capacity occurs due to the increase of strain at the lower flange. In the case of bare beam-to-RHS column connection, it is already known that occurrence of out-of-plane deformation in the column web, results in the reduction of rotation capacity of beam. However, in the composite beam-to-RHS column connection due to slab axial force, web connection is in more severe stress condition. Further comprehensive understanding of effect of out-of-plane deformation of RHS column on the behavior of composite beam is needed. In this paper results of finite element analysis and limit analysis are presented to clarify the structural condition of web connection. The force flow pattern and ultimate flexural capacity are evaluated by considering main parameters affecting the deformation. Correspondence between FEA, limit analysis and experimental data is shown, mechanism of mechanical stress transfer and strain concentration is explained.

Keywords

Acknowledgement

Supported by : Ministry of Education of Japan

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