Behavior of Concrete-Filled Steel Tube Beam Columns

Inai, Eiichi; Mukai, Atsushi; Kai, Makoto; Tokinoya, Hiroyoshi; Fukumoto, Toshiyuki; Mori, Koji

doi:10.1061/(asce)0733-9445(2004)130:2(189)

Cited by 93 publications

(31 citation statements)

References 4 publications

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“…Concentrated plasticity formulations model material nonlinearity only at hinges, usually of zero length, at the element ends while assuming the element remains elastic in between the hinges (Hajjar and Gourley 1997;El-Tawil and Deierlein 2001;Inai et al 2004). Distributed plasticity formulations allow material nonlinearity throughout the element, monitoring inelasticity at specific integration points along the length of the element (Hajjar et al 1998;Aval et al 2002;Varma et al 2002;Tort and Hajjar 2007).…”

Section: Finite Element Formulationsmentioning

confidence: 99%

Nonlinear Seismic Analysis of Circular Concrete-Filled Steel Tube Members and Frames

Denavit

Hajjar

2012

J. Struct. Eng.

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The Newmark Structural Engineering Laboratory (NSEL) of the Department of Civil and Environmental Engineering at the University of Illinois at Urbana-Champaign has a long history of excellence in research and education that has contributed greatly to the state-of-the-art in civil engineering. Completed in 1967 and extended in 1971, the structural testing area of the laboratory has a versatile strong-floor/wall and a three-story clear height that can be used to carry out a wide range of tests of building materials, models, and structural systems. The laboratory is named for Dr. Nathan M. Newmark, an internationally known educator and engineer, who was the Head of the Department of Civil Engineering at the University of Illinois and the Chair of the Digital Computing Laboratory . He developed simple, yet powerful and widely used, methods for analyzing complex structures and assemblages subjected to a variety of static, dynamic, blast, and earthquake loadings. Dr. Newmark received numerous honors and awards for his achievements, including the prestigious National Medal of Science awarded in 1968 by President Lyndon B. Johnson. He was also one of the founding members of the National Academy of Engineering. Contact:Prof ABSTRACTAccurate nonlinear formulations are necessary for the assessment of structures under seismic and other extreme loading. In this work, a three-dimensional distributed plasticity beam element formulation for circular concrete-filled steel tubes has been developed for nonlinear static and dynamic analyses of composite seismic force resisting systems. A mixed basis for the formulation was chosen to allow for accurate modeling of both material and geometric nonlinearities. The formulation utilizes uniaxial cyclic constitutive models for the concrete core and steel tube that account for the salient features of each material, as well as the interaction between the two, including concrete confinement and local buckling of the steel tube. The accuracy of the formulation was verified against a wide variety of analytical and experimental results. The verification confirms the capability of the formulation to accurately produce realistic simulations of element and frame behavior. CONTENTS

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Section: Finite Element Formulationsmentioning

confidence: 99%

Nonlinear Seismic Analysis of Circular Concrete-Filled Steel Tube Members and Frames

Denavit

Hajjar

2012

J. Struct. Eng.

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“…The correlation test [30,31] showed that the residual strength increased with the increase of confining pressure, and it showed a strong sensitivity to confining pressure.…”

Section: Support Theoriesmentioning

confidence: 99%

Experimental Study on Properties of Steel-plastic Geogrids and their Application in Supporting Engineering

Wang¹,

Lü²,

Kong³

et al. 2016

TOBCTJ

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Steel-plastic geogrid greatly improves the stability of surrounding rock in the supporting project due to the qualities, such as high strength, high toughness and less creep deformation. Through the geogrid mechanical properties analysis, tensile strength, deformation and creep test and field experiment and so on, we researched and analyzed steel-plastic geogrids' characteristics and supporting effect, and concluded the influencing factors of steel-plastic geogrids' characteristics, load-time curve and the steel-plastic geogrids' variation under different temperature. We explained steel-plastic geogrids' supporting effect through specific examples of projects. The results of the studies are listed as follows: (1) Steel-plastic geogrid has good resistance to deformation and node failure of roadway surrounding rock deformation, which has good tensile property, creep property and deflection performance; (2) It is feasible to support the surrounding rock by forming a whole combined joint support with steel-plastic geogrid and high-strength prestressed anchor rod.

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“…There have been many experimental studies on the behaviour of circular CFST columns, which can be classified as columns subjected to constant eccentricity with increasing moment and axial load (Kilpatrick and Rangan, 1999;Lee et al, 2011;Muciaccia et al, 2011;O'Shea and Bridge, 2000;Portoles et al, 2011Portoles et al, , 2013 and columns subjected to constant axial load and increasing moment with constant axial load (Fujimoto et al, 2004;Inai et al, 2004;Prion and Boehme, 1994). In an eccentrically loaded specimen, axial and flexural deformations will increase as the axial load increases whereas in the second type of test specimen, axial deformation has been exerted upon the column before flexure starts to rise.…”

Section: Introductionmentioning

confidence: 99%

Curvature-relevant analysis of eccentrically loaded circular concrete-filled steel tube columns

Ouyang¹,

2014

Magazine of Concrete Research

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The existence of curvature can reduce the effective confining pressure within concrete-filled steel tube (CFST) columns under eccentric compression. The existing analysis method ignores such an effect and still treats the confining pressure as constant across the whole section as if it is under axial compression. In this paper, the authors have made significant improvements on the existing model, so that the curvature effect can be taken into account to properly interpret the non-linear behaviour of eccentrically loaded CFST columns. Meanwhile, shortening between two hinges is an important data output in test programmes of this type, which has been completely neglected by the existing analysis method. This improved method also provides calculation steps to track the value of shortening for each load increment. Unknown parameters in this new method are determined on the basis of data fitting of 87 specimens from previous researchers' test programmes. The following parameters are incorporated in this study: effective tube length (660–4670 mm), diameter of tube (76–600 mm), tube thickness (1·52–8·81 mm), yield strength of tube (256·4–517·0 MPa), cylinder strength of concrete (26·42–112·70 MPa) and eccentricity (9·4–300 mm). The load–axial displacement, load–deflection and moment–curvature curves predicted by the new method agree well with their measured counterparts in the tests.

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Behavior of Concrete-Filled Steel Tube Beam Columns

Cited by 93 publications

References 4 publications

Nonlinear Seismic Analysis of Circular Concrete-Filled Steel Tube Members and Frames

Nonlinear Seismic Analysis of Circular Concrete-Filled Steel Tube Members and Frames

Experimental Study on Properties of Steel-plastic Geogrids and their Application in Supporting Engineering

Curvature-relevant analysis of eccentrically loaded circular concrete-filled steel tube columns

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