Strength analysis of concrete-filled thin-walled steel box columns

Ge, Hanbin; Usami, Tsutomu

doi:10.1016/0143-974x(94)90003-5

Cited by 117 publications

(63 citation statements)

References 3 publications

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“…So, it can be simply assumed that these two steel plates deform together as one steel plate, even there is an angle between them. According to Ge [4], when R i ≤0.85, local buckling will not occur before reaching the maximum load, then, where R i is the coefficient about width-thickness ratio of each steel plate, calculated by…”

Section: Proposed Methodsmentioning

confidence: 99%

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Study on Cross-shaped Concrete Filled Steel Tubular Stub Columns Subjected to Axial Compression: Experiments and Design Method

Chen¹,

Cai²,

Zuo³

et al. 2017

TOCIEJ

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Despite its wide application prospect, researches on the cross-shaped concrete filled steel tubular (CFT) columns are scarce, and no design method can be used. This paper concerns with the axial load behavior of cross-shaped CFT stub columns. Five specimens were tested to examine the influences of three parameters on the characteristics of failure, the bearing capacity and deformability. The parameters include the width-thickness ratios of steel plates, the yield strengths of steel and the sectional dimensions. Experimental results demonstrate that the global outward bulge of steel tube near the concave corners is significant, so that the stresses on the steel tube distribute unevenly and the confinement effects on the concrete are inferior to the rectangular CFT columns. By decreasing the width-thickness ratio of each steel plate, the global outward bulge near the concave corners was smaller, but the ductility could be improved only when it decreased by 2.08 times. By increasing the yield strength of steel to 1.47 times, the bearing capacity and deformation were inversely smaller, but the ductility was increased. By increasing the length-width ratio of each leg to 2.25 times, the global outward bulge was increased and local buckling occurred earlier. Then the application scopes for evaluating the maximum strength of specimens by the methods in design codes are provided. A new method is also proposed by considering the confinement effects of concrete and the strength loss of steel tube. The results predicted by the proposed method show good agreement with the experimental ones.

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Section: Proposed Methodsmentioning

confidence: 99%

“…The method raised by Ge [4] to calculate the value of ϕ si of the square or rectangular CFT columns is used for reference. It is suitable for the side-a 2 steel plate directly.…”

Section: Proposed Methodsmentioning

confidence: 99%

Study on Cross-shaped Concrete Filled Steel Tubular Stub Columns Subjected to Axial Compression: Experiments and Design Method

Chen¹,

Cai²,

Zuo³

et al. 2017

TOCIEJ

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show abstract

“…Moreover, concrete-filled steel columns can provide excellent seismic resistant behavior, such as high strength, high ductility, and large energy absorption capacity. As a result, various researches on these types of structures have been conducted in recent years (Gao et al [1]; Ge and Usami [2,3]; Ge et al [4,5]; Morino [6]; Schneider [7]; Susantha et al [8,9]; Hu et al [10]). Figure 1 shows a view of steel box-section bridge pier damaged during Hyogoken-nanbu earthquake near Kobe city in Japan on January 17, 1995.…”

Section: Numerical Simulation Of Hollow and Concrete-filled Steel Colmentioning

confidence: 99%

“…The plane interface element is an isoparametric element between two planes in a three-dimensional configuration, with which the interface surface and directions are evaluated automatically from the geometry of the element itself. In this analysis, the initial out-of-flatness is not taken into consideration due to its negligible effect on the ultimate strength (Ge and Usami [2]). An idealized form of residual stresses pattern of the plate panel due to welding is employed, as shown in Figure 6 (Chen and Ross [14]).…”

Section: Analytical Modelmentioning

confidence: 99%

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Numerical Simulation of Hollow and Concrete-Filled Steel Columns

Gao¹,

2007

Volume 3 Number 3

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This paper aims to predict the inelastic behavior of thin-walled steel and composite structures, such as hollow and concrete-filled steel columns. For this purpose, a three-dimensional (3D) elasto-plastic finite element analysis methodology has been presented for both thin-walled steel columns with pipe and box-shaped sections, and concrete-filled steel box columns. By comparing with experimental result, it is concluded that the proposed analytical method can give an accurate prediction to the experimental results of both steel and composite structures.Keywords: Steel column; concrete-filled steel column; interface element; cyclic loading; elasto-plastic behavior; buckling mode INTRODUCTIONCantilever steel hollow and concrete-filled columns (CFT) have been widely designed and used as bridge piers in many countries. Such cantilever type bridge piers occupy less space and thus allow the free traffic flow in the roads below the highways. Moreover, concrete-filled steel columns can provide excellent seismic resistant behavior, such as high strength, high ductility, and large energy absorption capacity. Figure 1 shows a view of steel box-section bridge pier damaged during Hyogoken-nanbu earthquake near Kobe city in Japan on January 17, 1995.A clear understanding of inelastic behavior is very important in developing a seismic design methodology for these structures. To this end, the load-displacement curves of the structures play a very important role. To date, fiber model analysis is usually considered as an effective and convenient approach for capacity prediction of structures (Susantha et al. [8,9]). However, this concept without considering local buckling of steel members or interaction between steel-concrete interfaces of composite members needs an additional criterion to determine the ultimate state. On the other hand, three dimensional approaches are very limited because of time-consuming of such analyses and complicated modeling in the case of composite structures. As the rapid development of computers and the spread of use of structural analysis software packages, the 3D analysis will be widely used to better understand inelastic behavior of complicated structures.

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Cyclic analysis and capacity prediction of concrete‐filled steel box columns

Susantha

Usami

2001

Earthq Engng Struct Dyn

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SUMMARYConcrete-ÿlled steel columns have been widely used in civil and architectural constructions throughout the world in recent years. This study is concerned with the cyclic elastoplastic analysis and capacity prediction of concrete-ÿlled steel columns having thick-and thin-walled sti ened box-shaped sections. An analytical procedure for determining the ultimate state of the concrete-ÿlled steel column is proposed based on the ÿber analysis technique. Strength and ductility predictions are made by means of a new failure criterion. This is proposed based on the average failure strain of concrete and steel at critical regions. A recently developed monotonic stress-strain relation for conÿned concrete is modiÿed so that it can be used in the analysis of thin-or thick-walled section columns with sti eners. A simple cyclic rule is introduced into this model in order to be used in cyclic analysis. Material non-linearity of steel is represented by the modiÿed two surface model developed at Nagoya University. The predictions are then compared with the existing experimental results and found to exhibit satisfactory agreement. Both small-and large-scaled columns are considered in the comparisons.

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Strength analysis of concrete-filled thin-walled steel box columns

Cited by 117 publications

References 3 publications

Study on Cross-shaped Concrete Filled Steel Tubular Stub Columns Subjected to Axial Compression: Experiments and Design Method

Study on Cross-shaped Concrete Filled Steel Tubular Stub Columns Subjected to Axial Compression: Experiments and Design Method

Numerical Simulation of Hollow and Concrete-Filled Steel Columns

Cyclic analysis and capacity prediction of concrete‐filled steel box columns

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