Experimental investigation of special-shaped concrete-filled steel tubular column to steel beam connections under cyclic loading

Abstract This paper presents experimental investigation and numerical investigation on seismic behavior of special-shaped concrete-filled steel tubular (CFST) column to steel beam joints. Exterior diaphragm and vertical rib are respectively introduced as joint stiffeners. A pseudo static experiment was conducted to investigate load transmission mechanism, failure mode and seismic performance index based on load-deformation curves and strain curves. The seismic behavior of the two kinds of joints were compared and evaluated. The classification of the joints by stiffness is conducted according to Eurocode. Inter-story drift of the specimens was calculated with data from laboratory apparatus and verified with test results. A design formula of joint shear resistance based on internal load transmission was proposed for engineering application. A finite element model of special-shaped CFST to steel beam connections was established as a supplement to analyze load transmission mechanism.

[1]  M. Fardis,et al.  Designer's guide to EN 1998-1 and en 1998-5 Eurocode 8: Design of structures for earthquake resistance; general rules, seismic actions, design rules for buildings, foundations and retaining structures/ M.Fardis[et al.] , 2005 .

[2]  Habib Tabatabai,et al.  Nonlinear finite element analysis and modeling of a precast hybrid beam–column connection subjected to cyclic loads , 2010 .

[3]  Mallikarjuna,et al.  Computer aided analysis of reinforced concrete columns subjected to axial compression and bending. I: L-shaped sections , 1992 .

[4]  Zhihua Chen,et al.  Seismic behavior of special shaped column composed of concrete filled steel tubes , 2012 .

[5]  Hua Yang,et al.  Compressive behavior of T-shaped concrete filled steel tubular columns , 2010 .

[6]  James M. Ricles,et al.  Seismic Behavior of Composite Concrete Filled Steel Tube Column-Wide Flange Beam Moment Connections , 2004 .

[7]  Jian Cai,et al.  Axial load behavior of square CFT stub column with binding bars , 2006 .

[8]  Zhang Sumei.  Experimental research on seismic behavior of T-shaped concrete-filled steel tube columns with reinforcement stiffeners , 2012 .

[9]  Gao Dui-xian,et al.  Seismic Behavior Analysis of Special-Shaped Column Frame Structure , 2005 .

[10]  Jian Cai,et al.  Axial load behavior of L-shaped CFT stub columns with binding bars , 2012 .

[11]  Cheng-Tzu Thomas Hsu,et al.  T-SHAPED REINFORCED CONCRETE MEMBERS UNDER BIAXIAL BENDING AND AXIAL COMPRESSION , 1989 .

[12]  Feng Fu,et al.  Static behavior of T-shaped concrete-filled steel tubular columns subjected to concentric and eccentric compressive loads , 2015 .

[13]  Sheng-Fu Tsai,et al.  Seismic behavior of bidirectional bolted connections for CFT columns and H-beams , 2007 .

[14]  Jian Cai,et al.  Eccentric load behavior of L-shaped CFT stub columns with binding bars , 2012 .

[15]  Zhao Shaowei,et al.  Seismic Behavior of Frame with Specially Shaped Columns Subjected to Cyclic Load , 2007 .

[16]  Luo Jin-hui.  Hysteretic Behavior of Concrete-Filled L-Section Steel Tubular Columns under Cyclic Loading , 2009 .

[17]  C. Dundar,et al.  Arbitrarily shaped reinforced concrete members subject to biaxial bending and axial load , 1993 .

[18]  R. Nascimbene,et al.  Towards Non–Standard Numerical Modeling of Thin-Shell Structures: Geometrically Linear Formulation , 2014 .

[19]  S. Chan,et al.  Biaxial bending design of arbitrarily shaped reinforced concrete column , 1993 .

[20]  Lap-Loi Chung,et al.  Seismic behavior of bolted beam-to-column connections for concrete filled steel tube , 2005 .

[21]  I. Nishiyama,et al.  INELASTIC FORCE-DEFORMATION RESPONSE OF JOINT SHEAR PANELS IN BEAM-COLUMN MOMENT CONNECTIONS TO CONCRETE-FILLED TUBES , 2004 .

[22]  Habib Tabatabai,et al.  Non-Dimensional Design Procedures for Precast, Prestressed Concrete Hybrid Frames , 2006 .