Behavior of concrete-filled double skin steel tube beam-columns

Circular concrete-filled double-skin steel tubular (CFDST) columns with external stainless-steel are high-performance composite columns that have potential applications in civil construction including the construction of offshore structures, bridge piers, and transmission towers. Reflecting the limited research performed on investigating their mechanical performance, this study develops a computationally efficient fiber model to simulate the responses of short and slender beam-columns accounting for the influences of material and geometric nonlinearities. Accurate material laws of stainless steel, carbon steel, and confined concrete are implemented in the mathematical modeling scheme developed. A new solution algorithm based on the Regula-Falsi method is developed to maintain the equilibrium condition. The independent test results of short and slender CFDST beam-column are utilized to validate the accuracy of the theoretical solutions. The influences of various column parameters are studied on the load-axial strain [Formula: see text] curves, load-lateral deflection [Formula: see text] curves, column strength curves, and interaction curves of CFDST columns. Design formulas are suggested for designing short and beam-columns and validated against the numerical results. The computational model is found to be capable of simulating the responses of CFDST short and slender columns reasonably well. Parametric studies show that the consideration of the concrete confinement is important for the accuracy of the prediction of their mechanical responses. Furthermore, high-strength concrete can be utilized to enhance their load-carrying capacity particularly for short and intermediate slender beam-columns. The strengths of CFDST columns computed by the suggested design model are in good agreement with the test and numerical results.

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A distributed plasticity model for concrete-filled steel tube beam-columns with interlayer slip

Engineering Structures ◽

10.1016/s0141-0296(97)00107-7 ◽

1998 ◽

Vol 20 (8) ◽

pp. 663-676 ◽

Cited By ~ 82

Author(s):

Jerome F. Hajjar ◽

Paul H. Schiller ◽

Aleksandr Molodan

Keyword(s):

Steel Tube ◽

Plasticity Model ◽

Concrete Filled Steel Tube ◽

Beam Columns ◽

Interlayer Slip

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Axial Behavior of Concrete-Filled Double-Skin Tubular Stub Columns Incorporating PVC Pipes

Crystals ◽

10.3390/cryst11121434 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1434

Author(s):

Muhammmad Faisal Javed ◽

Haris Rafiq ◽

Mohsin Ali Khan ◽

Fahid Aslam ◽

Muhammad Ali Musarat ◽

...

Keyword(s):

Steel Tube ◽

Tube Material ◽

Steel Tubes ◽

Tubular Columns ◽

Axial Capacity ◽

Double Skin ◽

Axial Behavior ◽

Pvc Pipe ◽

The Cost ◽

Stub Columns

This experimental study presents concrete-filled double-skin tubular columns and demonstrates their expected advantages. These columns consist of an outer steel tube, an inner steel tube, and concrete sandwiched between two tubes. The influence of the outer-to-inner tube dimension ratio, outer tube to thickness ratio, and type of inner tube material (steel, PVC pipe) on the ultimate axial capacity of concrete-filled double-skin tubular columns is studied. It is found that the yield strength of the inner tube does not significantly affect the ultimate axial capacity of concrete-filled double-skin tubular composites. With the replacement of the inner tube of steel with a PVC pipe, on average, less than 10% strength is reduced, irrespective of size and dimensions of the steel tube. Hence, the cost of a project can be reduced by replacing inner steel tubes with a PVC pipes. Finally, the experimental results are compared with the existing design methods presented in AISC 360-16 (2016), GB51367 (2019), and EC4 (2004). It is found from the comparison that GB51367 (2019) gives better results, followed by AISC (2016) and EC4 (2004).

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Experimental Investigation on Concrete-Filled Double-Skin Steel Tube Under Eccentric Tension

Proceedings of the 10th Pacific Structural Steel Conference (PSSC 2013) ◽

10.3850/978-981-07-7137-9_085 ◽

2013 ◽

Cited By ~ 1

Author(s):

Wei Li ◽

Lin-Hai Han ◽

Tak-Ming Chan

Keyword(s):

Experimental Investigation ◽

Steel Tube ◽

Double Skin

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Damage Assessment of Rectangular Concrete-Filled Steel Tubes for Performance-Based Design

Earthquake Spectra ◽

10.1193/1.1809660 ◽

2004 ◽

Vol 20 (4) ◽

pp. 1317-1348 ◽

Cited By ~ 6

Author(s):

Cenk Tort ◽

Jerome F. Hajjar

Keyword(s):

Experimental Tests ◽

Steel Tube ◽

Performance Based Design ◽

Damage State ◽

Damage Functions ◽

Experimental Database ◽

Beam Columns ◽

Damage States ◽

Concrete Filled Steel Tubes ◽

Different Levels

Damage evolution of rectangular concrete-filled steel tube (RCFT) column and beam-column members as documented in experimental tests is presented in this paper. An experimental database was first constructed that included RCFT tests that were reported in detail in the worldwide literature. Based on the experimental data, appropriate damage states for RCFT members, connections, and frames were defined at different levels of loading. For each damage state, the performance of the specimens was documented quantitatively with the use of deformation-based damage functions, energy-based damage functions, and ductility functions developed in this work. The paper then documents how to use these damage measures to assess capacity of RCFT columns and beam-columns within the context of a performance-based design methodology.

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Axisymmetric simulation of circular concrete-filled double-skin steel tubular short columns incorporating outer stainless-steel tube

Engineering Structures ◽

10.1016/j.engstruct.2020.111416 ◽

2021 ◽

Vol 227 ◽

pp. 111416

Author(s):

Tuan Trung Le ◽

Vipulkumar Ishvarbhai Patel ◽

Qing Quan Liang ◽

Phat Huynh

Keyword(s):

Stainless Steel ◽

Steel Tube ◽

Stainless Steel Tube ◽

Short Columns ◽

Double Skin

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Analysis on the Status of Concrete Filled Double Skin Steel Tubes Mechanical Properties

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.488-489.374 ◽

2014 ◽

Vol 488-489 ◽

pp. 374-376

Author(s):

Bing Wang ◽

Lu Ma ◽

Xiao Liu

Keyword(s):

Mechanical Properties ◽

Research Work ◽

Steel Tube ◽

Steel Tubes ◽

Concrete Filled Steel Tube ◽

Research Results ◽

Foreign Literature ◽

The Status ◽

Double Skin

Concrete filled double skin steel tubes which is developed on the basis of concrete filled steel tube, it is a new member. Combination of Chinese and foreign literature, this paper comprehensively discusses the research results about concrete filled double skin steel tubes member, then put forward the further research work, for concrete filled double skin steel tubes structure in deeply study to play a guiding role.

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