Behavior and strength of circular concrete-filled tube columns

Elremaily, Ahmed; Azizinamini, Atorod

doi:10.1016/s0143-974x(02)00005-6

Cited by 228 publications

(88 citation statements)

References 5 publications

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“…The behavior of CFST columns and structural systems has been investigated. Tao et al experimentally investigated the behavior of CFST stub columns, and beam columns under various loading protocols have also been investigated [8][9][10][11][12][13][14][15]. They found that CFST demonstrated ductile behavior for the applications in seismic resistant structures.…”

Section: Simplified Fiber Element Modelsmentioning

confidence: 99%

Thin-Walled CFST Columns for Enhancing Seismic Collapse Performance of High-Rise Steel Frames

et al. 2017

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This paper numerically studied the collapse capacity of high-rise steel moment-resisting frames (SMRFs) using various width-to-thickness members subjected to successive earthquakes. It was found that the long-period component of earthquakes obviously correlates with the first-mode period of high-rises controlled by the total number of stories. A higher building tends to produce more significant component deterioration to enlarge the maximum story drift angle at lower stories. The width-to-thickness ratio of beam and column components overtly affects the collapse capacity when the plastic deformation extensively develops. The ratio of residual to maximum story drift angle is significantly sensitive to the collapse capacity of various building models. A thin-walled concrete filled steel tubular (CFST) column is proposed as one efficient alternative to enhance the overall stiffness and deformation capacity of the high-rise SMRFs with fragile collapse performance. With the equivalent flexural stiffness, CFST-MRF buildings with thin-walled members demonstrate higher capacity to avoid collapse, and the greater collapse margin indicates that CFST-MRFs are a reasonable system for high-rises in seismic prone regions.

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Section: Simplified Fiber Element Modelsmentioning

confidence: 99%

Thin-Walled CFST Columns for Enhancing Seismic Collapse Performance of High-Rise Steel Frames

et al. 2017

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“…La expresión [22] la resistencia de cálculo frente al esfuerzo axil, teniendo en cuenta el confinamiento (en ausencia de armaduras longitudinales). Los coeficientes na y nc se definen en las expresiones [23] [24] [25] y [26].…”

Section: Resistance Of Concrete-filled Tubular Structures (Cft) On Inunclassified

Capacidad resistente de pilas metálicas tubulares circulares rellenas de hormigón (CFT) en puentes integrales

Chacón¹,

Arrizabalaga²,

Real³

2012

Inf. constr.

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“…One is concrete filled tube (steel or FRP) column that is mainly applied in new structures, the other is steel or FRP externally jacketed or wrapped concrete column that is mainly used in retrofit of existing structures. The seismic performance of steel-confined concrete columns [1][2][3][4] and FRP-confined concrete columns [5][6][7][8] has been studied extensively. These confined concrete columns exhibit better ductility and energy dissipation capacity than ordinary reinforced concrete columns, but are very poor in fire resistance.…”

Section: Introductionmentioning

confidence: 99%

Seismic behavior of steel reinforced ECC or ECC/concrete composite short columns

Xu¹,

Pan²,

Cai³

2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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Engineered cementitious composites (ECC) is an advanced composite material with strain hardening and multiple cracking behaviors. For a reinforced concrete short column, substitution of conventional concrete with ECC can significantly improve the deformation and energy dissipation ability. In this paper, it is proposed that concrete in the bottom region (plastic hinge region) of short columns is substituted with ECC to form ECC/RC composite short columns to improve the seismic performance and economic efficiency. Firstly, two ECC/RC composite short columns, one ECC short column and one RC short column were tested under reversed cyclic loading. The influence of shear reinforcement ratio of the composite columns was investigated as well. Then, a finite element analysis with the software of ATENA was carried out to obtain the optimal height of the ECC layer in the ECC/RC composite column. The mechanical behaviors of RC short column, ECC short column and ECC/RC composite short columns with different heights of ECC layers under combined vertical and horizontal loading were comprehensively studied and compared. The experimental results indicate that the use of ECC in the column bottom can change the failure mode from brittle flexure-shear failure to ductile flexure failure mode. The ECC and ECC/RC composite short column are extremely similar in seismic performance, and have superior ultimate load capacity, ductility and energy dissipation capacity to the RC short column. Due to higher shear strength, ECC can partly replace stirrups and reduce the stirrup ratio of ECC/RC composite short column. The simulation results show that the ECC/RC composite short column, where the ECC layer is 0.8h (h is the depth of the column section) height, can achieve similar mechanical properties of ECC short column. And the ECC zone in this composite column is just the plastic hinge regions of the RC short column.

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Behavior and strength of circular concrete-filled tube columns

Cited by 228 publications

References 5 publications

Thin-Walled CFST Columns for Enhancing Seismic Collapse Performance of High-Rise Steel Frames

Thin-Walled CFST Columns for Enhancing Seismic Collapse Performance of High-Rise Steel Frames

Capacidad resistente de pilas metálicas tubulares circulares rellenas de hormigón (CFT) en puentes integrales

Seismic behavior of steel reinforced ECC or ECC/concrete composite short columns

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