Seismic performance of the concrete-encased CFST column to RC beam joint: Experiment

Ma, Donghui; Han, Lin-Hai; Zhao, Xiao‐Ling

doi:10.1016/j.jcsr.2018.11.030

Cited by 60 publications

(16 citation statements)

References 21 publications

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“…At the ambient temperature, this section uses a five-stage elastoplastic model to characterize the stress-strain relationship of the steel tube. As depicted in Figure 17, this model is composed of the elasticity (oa), the elastic plasticity (ab), the plasticity (bc), the strengthening (cd), and the secondary plastic flow (de) phase [44], and corresponding formulas of the stress-strain curve under each phase are presented in equation (4). e solid line denotes the simplified stress-strain relationship curve of the steel, and the red line represents the actual stress-strain relationship curve of the steel.…”

Section: Constitutive Relation Of Materialsmentioning

confidence: 99%

“…As one of the main components of buildings, concretefilled steel tube (CFST) column has several advantages such as high rigidity, high strength, large capacity of energy absorption, and high ductility [1][2][3]. However, multiple damage forms (i.e., crack, debonding, drumming, and large deformation) [4][5][6][7] caused by various factors including the fire [8], aging [9], earthquake [4,5], impact [6,7], and corrosion [10][11][12], will downgrade the performance of CFST structures. Particularly, it is well known that physical properties such as the strength and stiffness of concrete and steel are greatly reduced when the CFST short column is subjected to elevated temperature.…”

Section: Introductionmentioning

confidence: 99%

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Behavior of the T‐Shaped Concrete‐Filled Steel Tubular Columns after Elevated Temperature

Liu

Zhang

et al. 2021

Advances in Civil Engineering

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The mechanical properties of T-shaped concrete-filled steel tubular (TCFST) short columns under axial compression after elevated temperature are investigated in this paper. A total of 30 TCFST short columns with different temperature (T), steel ratio (α), and duration of heating (t) were tested. The TCFST column was directly fabricated by welding two rectangular steel tubes together. The study mainly investigated the failure modes, the ultimate bearing capacity, the load-displacement, and the load-strain performance of the TCFST short columns. Experimental results indicate that the rectangular steel tubes of the TCFST column have deformation consistency, and the failure mode consists of local crack, drum damage, and shear failure. Additionally, the influence of high temperature on the residual bearing capacity of the TCFST is significant, e.g., a higher temperature can downgrade the ultimate bearing capacity. Finally, a finite element model (FEM) is developed to simulate the performance of the TCFST short columns under elevated temperature, and the results agree with experimental values well. Overall, this investigation can provide some guidance for future studies on damage assessment and reinforcement of the TCFST columns.

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Section: Constitutive Relation Of Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Behavior of the T‐Shaped Concrete‐Filled Steel Tubular Columns after Elevated Temperature

Liu

Zhang

et al. 2021

Advances in Civil Engineering

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“…After that, Li et al (2010) tested the seismic performance of four abnormal steel RC column joints to RC beam. For CFST column to RC beam joint, Ma et al (2012) presented an experimental investigation of seismic performance of staggered concrete-encased CFST column to RC beam joint.…”

Section: Introductionmentioning

confidence: 99%

Development and seismic performance of staggered and out-of-plane joints between concrete-filled steel tubular column and reinforced concrete beam

Dang

Liang

Zhu

et al. 2020

Advances in Structural Engineering

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This article presents a staggered and out-of-plane connection between concrete-filled steel tubular column and reinforced concrete beam (SOC-TCB). SOC-TCB is taken from the basement roof joint of Suning center, which is a height of 341.85 m in China. In this joint system, the H-shaped steel brackets are welded with steel tube to transfer shear and moment. Moreover, the reinforcing bars are interrupted by steel tube and lapped with steel bracket. To investigate the seismic behavior of SOC-TCB, four types of SOC-TCBs were tested under reversal cyclic loading. The differences between specimens were staggered height and out-of-plane angle. Seismic performance was evaluated based on hysteretic behavior, failure mode, shear deformation, rotational deformation, and energy dissipation. The results showed that the shear deformation of joints was extremely small and the plastic hinges were formed at reinforced concrete beams. Due to insufficient anchorage length of longitudinal bars, anchoring failure was found in the reinforced concrete beams. However, SOC-TCB showed better seismic behavior as long as sufficient anchorage of longitudinal bars was ensured.

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“…Kai et al [28] studied that the steel arch strengthened by a prestressed broken line hinged steel arch can effectively share and improve the self-weight internal force of the arch rib and significantly improve its compressive capacity. Ma et al [29] presented an experimental investigation of the seismic performance of joints of concrete-encased concrete-filled steel tubular (CFST) column. Four types of typical failure modes are found, and the seismic performance of the composite joint is also evaluated by several indexes, such as rigidity degradation, strength degradation, ductility, and energy dissipation.…”

Section: Introductionmentioning

confidence: 99%

Reaction Spectrum Comparative Analysis of Seismic Performance of 62 m CFST Bridge with Curved‐String Truss before and after Reinforcement

Chen

et al. 2020

Advances in Civil Engineering

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Taking a 62 m CFST bridge with a curved-string truss as the research object, according to its reinforcement scheme, the spatial finite element models of the bridge before and after reinforcement were established by using the general finite element software ANSYS. The natural frequencies of the bridge before and after reinforcement were calculated, and the seismic performance of the bridge was analyzed by using the response spectrum method. The results show that the frequencies of the reinforced bridges increase in varying degrees, especially the vertical and torsional frequencies. Before and after reinforcement, the maximum axial force in the upper chord of the bridge is the largest, and the shear force and bending moment are small. The maximum internal force appears at the two ends of the upper chord. This position should be regarded as the weak link of the bridge seismic resistance. Under the same conditions, the axial force of the bridge after reinforcement is reduced by about 30% compared with that before reinforcement, and the displacement of the bridge after reinforcement is reduced in varying degrees. The reinforcement measures can improve the lateral and vertical stiffness of the bridge, especially the stiffness of the deck system.

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Seismic performance of the concrete-encased CFST column to RC beam joint: Experiment

Cited by 60 publications

References 21 publications

Behavior of the T‐Shaped Concrete‐Filled Steel Tubular Columns after Elevated Temperature

Behavior of the T‐Shaped Concrete‐Filled Steel Tubular Columns after Elevated Temperature

Development and seismic performance of staggered and out-of-plane joints between concrete-filled steel tubular column and reinforced concrete beam

Reaction Spectrum Comparative Analysis of Seismic Performance of 62 m CFST Bridge with Curved‐String Truss before and after Reinforcement

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