ELEMENT STIFFNESS MATRIX AND INTERNAL FORCE ANALYSIS OF BEAM WITH REDUCED BEAM SECTION CONNECTION IN STEEL FRAMES

Han Minglan; Wang Yan

doi:10.13204/j.gyjz201101026

Volume 41 Issue 1

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Han Minglan, Wang Yan. ELEMENT STIFFNESS MATRIX AND INTERNAL FORCE ANALYSIS OF BEAM WITH REDUCED BEAM SECTION CONNECTION IN STEEL FRAMES[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(1): 111-119. doi: 10.13204/j.gyjz201101026

Citation:

Han Minglan, Wang Yan. ELEMENT STIFFNESS MATRIX AND INTERNAL FORCE ANALYSIS OF BEAM WITH REDUCED BEAM SECTION CONNECTION IN STEEL FRAMES[J]. INDUSTRIAL CONSTRUCTION, 2011, 41(1): 111-119. doi: 10.13204/j.gyjz201101026

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ELEMENT STIFFNESS MATRIX AND INTERNAL FORCE ANALYSIS OF BEAM WITH REDUCED BEAM SECTION CONNECTION IN STEEL FRAMES

doi: 10.13204/j.gyjz201101026

1.
Qingdao Technological University,Qingdao,266033,China

Received Date: 2010-08-05
Publish Date: 2011-01-20

Abstract

Abstract

Reduced beam section connection(RBS) can make plastic hinge away from the beam and column interface,improve ductility of the structure and reach the purpose of seismic design of the connections.Element stiffness matrix and rotational displacement equation of the beam with RBS were derived using energy method,and then internal forces were analyzed by example.The results show that RBS leads to decreasing beam bending stiffness and lateral stiffness of rigid frame,the location of the point of inflection moves forward,but the moment of RBS beam fixed-end decreases and midspan moment increases;all the elements in the stiffness matrix decrease as compared with the ordinary connections,the reduction is related to the length of the beam,cutting depth,length of the cuts and distance from end of beam to initiation of the flange reduction.The beam flange reductions have main effect on beam stiffness,relatively small effect on internal force.Simplified calculation just to consider changes in stiffness and ignore the effect of changes in internal force was presented in the paper.
- reduced beam section connection,
- element stiffness matrix,
- coefficient of stiffness reduction,
- internal force analysis,
- finite element analysis

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References(11)

References

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