Concrete-filled steel tube (CFT) truss girders: Experimental tests, analysis, and design

Huang, Wenjin; Lai, Zhichao; Chen, Baochun; Xie, Zhitao; Varma, Amit H.

doi:10.1016/j.engstruct.2017.11.026

Cited by 38 publications

(15 citation statements)

References 9 publications

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“…9 shows that, for the specimen D60T50B50S12, the failure mode was the joint shear failure (weld fracture) where the ratio of the shear span to depth was (3.075). This result agreed with that obtained by Huang et al [8]. In the case of the specimen D60T0B50S12, the failure mode was surface plasticity failure as shown in Fig.…”

Section: The Failure Patternsupporting

confidence: 92%

“…al. [8]. It was previously agreed that the strength of CFST exceeds that of the hollow tube Chan et.…”

Section: Load-deflection Relationshipmentioning

confidence: 93%

“…al. [8]. The tensile strength is improved by about 11% when using CFST compared to a hollow steel tube Han et.…”

Section: Introductionmentioning

confidence: 99%

“…The steel tube of the upper chord is prevented from buckling inward in compression and the steel tube of the lower chord is avoided from contraction inward in tension. The CFST also improved the whole flexural stiffness of the truss and the strength of the joints [8,[10][11][12]. Numerous studies have been conducted on the behaviour of CFST truss girders in flexural with different parameters [13][14][15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Effect of filling steel tube chords by concrete on the structural behaviour of composite truss girders

Alnebhan

Shallal

2020

QJES

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In this study, three specimens of Warren truss girders composite with concrete deck slab were tested experimentally under a central monotonic load to study the effect of the existence of concrete inside the chords. The load capacity, deflection, slip between the concrete slab and steel tube, and failure modes were reported. Both chords were filled with concrete to the first specimen, only the lower chord was filled with concrete and the upper chord remained hollow to the second specimen and both chords were kept hollow in the third specimen. The result indicated that the existence of concrete inside the chords has a significant effect on the load capacity, failure pattern, and the slip. The steel tubes of the upper chord filled by concrete prevent surface plasticity failure of the upper chord under loading and increase the ultimate load by 6.68 %. Also, filling the lower chord with concrete prevents the surface plasticity failure in the supports zone and caused an increase in the ultimate load by 39.59 %. The slip at the end of the specimen of two chords filled with concrete is less by 71% than the end slip of specimen of hollow top chord and higher by 46.8 % than the specimen of two hollow chords.

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Section: The Failure Patternsupporting

confidence: 92%

“…al. [8]. It was previously agreed that the strength of CFST exceeds that of the hollow tube Chan et.…”

Section: Load-deflection Relationshipmentioning

confidence: 93%

“…al. [8]. The tensile strength is improved by about 11% when using CFST compared to a hollow steel tube Han et.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of filling steel tube chords by concrete on the structural behaviour of composite truss girders

Alnebhan

Shallal

2020

QJES

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“…As an innovative structural component, CFT members have been used widely around the world in various structures. For example, they have been used as: (i) chords in composite arch bridges [4], (ii) mega columns in high-rise buildings [5], (iii) piles in floodwall structures [6], and (iv) bridge piers [7].…”

Section: Introductionmentioning

confidence: 99%

Analysis and behavior of high-strength rectangular CFT columns

Lai¹,

Varma²

2018

Proceedings 12th International Conference on Advances in Steel-Concrete Composite Structures - ASCCS 2018

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The current AISC Specification (AISC 360-16) specifies the material strength limits for concrete-filled steel tube (CFT) columns. According to AISC 360-16, the steel yield stress (F y ) for CFT columns should not exceed 525 MPa, and the concrete compressive strength (f' c ) should not exceed 70 MPa. CFT columns are classified as high strength if either F y or f' c exceeds these specified limits, and are classified as conventional strength if both F y and f' c are less than or equal to the limits. Due to lack of adequate research and comprehensive design equations, AISC 360-16 does not endorse the use of high-strength materials for CFT columns. This paper makes a contribution towards addressing this gap using a two-step approach. The first step consists of compiling an experimental database of high-strength rectangular CFT column tests in the literature and evaluating the possibility of extending the current AISC 360-16 design equations to high-strength rectangular CFT columns. The second step consists of developing and benchmarking detailed 3D nonlinear finite element models for predicting the behavior of high-strength CFT columns from the database. The benchmarked models are being used to perform comprehensive parametric studies to address gaps in the database and propose design equations for high-strength rectangular CFT members, which will be part of a future paper.

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Behavior of geopolymer concrete‐filled circular steel tube members

Fang

Visintin

2021

ce papers

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Behavior of geopolymer concrete‐filled circular steel tube members was experimentally investigated. Four column specimens and one beam specimen were prepared using fly‐ash based geopolymer concrete. The material properties for both circular steel tubes and the geopolymer concrete infill were measured. The column specimens were tested under concentric and eccentric compression while the beam specimen was tested under three‐pointing bending, aiming to investigate the behavior of the structures subject to compression or combined loading. The load‐deformation behavior, compressive and bending strengths and failure mode of the specimens observed through the experiments are also reported in this paper. The compressive load and moment interaction relationship was developed using the experimental results. The measured ultimate compressive loads and ultimate moment capacity were also compared with the predictions obtained based on European and American Standards. It shows through the comparison that the predictions based on the standards are conservative. Therefore, the European and American Standards can be applied to safely design the structures.

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Concrete-filled steel tube (CFT) truss girders: Experimental tests, analysis, and design

Cited by 38 publications

References 9 publications

Effect of filling steel tube chords by concrete on the structural behaviour of composite truss girders

Effect of filling steel tube chords by concrete on the structural behaviour of composite truss girders

Analysis and behavior of high-strength rectangular CFT columns

Behavior of geopolymer concrete‐filled circular steel tube members

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