Vol. 9, No. 3, pp. 173-189 (2013)
SEISMIC PERFORMANCE AND DESIGN OF REDUCED STEEL BEAM SECTION
WITH CONCRETE FILLED SQUARE TUBULAR COLUMN
Yanli Guo 1 and Xingyou Yao 1,2,*
1 Lecture, School of Civil and Building Engineering,Nanchang Institute of Technology, Nanchang, China
2 College of Civil Engineering, Tongji University, Shanghai, China
*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.">This email address is being protected from spambots. You need JavaScript enabled to view it. )
Received: 6 September 2011; Revised: 18 February 2012; Accepted: 29 February 2012
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ABSTRACT
According to the anti-seismic design principle of strong column and weak beam, and of strong joint and weak member, reduced beam section (RSB) is often used to shift away plastic hinge from end of beam to the weaken region of the beam. The non-linear finite element models are established for concrete-filled steel square tubular column and reduced steel beam with holes in flange or in flange and web, considering geometric large deformation and material nonlinear. Comparison is made on load-displacement curves, the stress distribution of reduced beams, the ultimate load-carrying capacity, the ductility, and the energy-dissipating ability between analysis results of different RBS section and experimental results. It shows that the stiffness and ultimate load-carrying capacity of new RBS section are close to traditional RBS section, the plastic hinge in the new section with reduced beam section can be moved to the reduced region, and the new section display good ductility, energy-dissipating ability and seismic behavior. Based on Chinese codes and analysis results, the seismic design method of concrete-filled steel square tubular column and reduced steel beam section are proposed in this paper.
KEYWORDS
Shape optimization, seismic design, Concrete-filled steel square tubular column, Beam-column joint, Reduced beam section, Nonlinear FEM
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