Experimental and analytical performance evaluation of steel beam to concrete-encased composite column with unsymmetrical steel section joints

Xiao, Yao; Zeng, Lei; Cui, Zhenkun; Jin, Siqian; Chen, Yi-Guang

doi:10.12989/scs.2017.23.1.017

Cited by 26 publications

(8 citation statements)

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“…where P f is the conditional probability of failure; Φ is the standard normal cumulative distribution function; C and D are the structural capacity and structural demand, respectively; C ∧ is the average of C, which is obtained from IDA; D ∧ is the average of D, which is taken as α (S a (T 1 ,5%)) β ; both C is taken as 0.4 when the fragility curve is expressed in terms of spectral acceleration. [44] The failure probability corresponding to limit states can be calculated on the basis of Equation (7). The formulas for IO, LS, and CP states are proposed as in Equations (8)- (16).…”

Section: Fragility Curvesmentioning

confidence: 99%

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Seismic fragility analysis of concrete encased frame‐reinforced concrete core tube hybrid structure based on quasi‐static cyclic test

Xiao

Zeng

Chen

et al. 2019

Structural Design Tall Build

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Summary Concrete‐encased frame‐core tube hybrid structural system has been widely employed in high‐rise buildings. This paper intends to analyze the seismic fragility of this structural system under ground motion excitation. The quasistatic cyclic test on a 1/5‐scaled, 10‐story three‐bay specimen is introduced. Fiber‐based finite element model is developed and integrated with numerical techniques that would be able to simulate the nonlinear response based on the OpenSees program. As the model is verified by the experimental data, a series of incremental dynamic analyses (IDAs) considering different frame‐tube stiffness ratios are carried out. IDA curves are drawn to describe each structural performance state. Fragility curves and probabilistic demand models are proposed for quantifying failure probability. The collapse margin ratio is employed to evaluate the collapse probability. The result shows that the collapse probability under rare earthquake still meets the requirement of Applied Technology Committee‐63 Report. The hybrid structure is proved to perform superior collapse resistance ability. The proper increase in the stiffness of core tube can reduce the collapse probability and enhance the collapse resistance capacity.

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Section: Fragility Curvesmentioning

confidence: 99%

“…Recently, this hybrid structure had been systematically studied . A series of researches were carried out to reveal the seismic performance, failure mode, dynamic characteristics, and so on . Sun, Zou, and Wang found that both extension length and area ratio of shape steel obviously influenced the bearing capacity of hybrid structure.…”

Section: Introductionmentioning

confidence: 99%

Seismic fragility analysis of concrete encased frame‐reinforced concrete core tube hybrid structure based on quasi‐static cyclic test

Xiao

Zeng

Chen

et al. 2019

Structural Design Tall Build

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“…The displacement ductility coefficient, , is calculated by (4), and an equivalent viscous coefficient, ℎ e , to evaluate the energy dissipation of specimen, is calculated by (5).…”

Section: Ductility and Energy Dissipationmentioning

confidence: 99%

“…This composite structural system consists of columns located on the periphery of the building and tube located on the center of the building. This arrangement embodies the design concept of two lines to resist shear force [4,5]. The first line of defense is RC core tube with high lateral stiffness; it will bear most of the shear force caused by the horizontal earthquake.…”

Section: Introductionmentioning

confidence: 99%

Quasi‐Static Cyclic Test on a Concrete‐Encased Frame‐Reinforced Concrete Tube Building Model

Zeng

Xiao

Chen

et al. 2018

Shock and Vibration

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This paper experimentally investigated the seismic behavior of a 1:5 reduced-scale model of concrete-encased steel frame-reinforced concrete core tube building. The quasi-static testing with multipoint loading was carried out, and mode-superposition response spectrum method was adopted to control the amplitude of displacement. The damage process, crack pattern, and failure mode were observed. Various parameters were obtained, including lateral deformation, hysteretic characteristics, strain distribution, ductility, and energy dissipation capacity. The test revealed the distributions of base shear between the core tube and frame. The result indicated that the core tube bears major loading and exhibited overturning failure, afterwards frame carry the surplus load and exhibited column tensile failure and joint panel shear failure. The characteristic of two seismic resistant systems are reflected by the excellent cooperation of core tube and frame.

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“…Due to the advantages of concrete-encased composite structure [1], there are extensive studies [2][3][4][5][6] focusing on its seismic performance. The research on progressive collapse has become of increasing interest in recent years, especially since the World Trade Center towers collapse following the terrorist attacks of 11 September 2001.…”

Section: Introductionmentioning

confidence: 99%

Progressive Collapse Analysis of SRC Frame-RC Core Tube Hybrid Structure

et al. 2018

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Steel reinforced concrete (SRC) frame-reinforced concrete (RC) core tube hybrid structures are widely used in high-rise buildings. Focusing on the progressive collapse behavior of this structural system, this paper presents an experiment and analysis on a 1/5 scaled, 10-story SRC frame-RC core tube structural model. The finite element (FE) model developed for the purpose of progressive collapse analysis was validated by comparing the test results and simulation results. The alternate load path method (APM) was applied in conducting nonlinear static and dynamic analyses, in which key components including columns and shear walls were removed. The stress state of the beams adjacent to the removed component, the structural behavior including inter-story drift ratio and shear distribution between frame and tube were investigated. The demand capacity ratio (DCR) was applied to evaluate the progressive collapse resistance under loss of key components scenarios. The results indicate that the frame and the tube cooperate in a certain way to resist progressive collapse. The core tube plays a role as the first line of defense against progressive collapse, and the frame plays a role as the second line of defense against progressive collapse. It is also found that the shear distribution is related to the location of the component removed, especially the corner column and shear walls.

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Experimental and analytical performance evaluation of steel beam to concrete-encased composite column with unsymmetrical steel section joints

Cited by 26 publications

References 0 publications

Seismic fragility analysis of concrete encased frame‐reinforced concrete core tube hybrid structure based on quasi‐static cyclic test

Seismic fragility analysis of concrete encased frame‐reinforced concrete core tube hybrid structure based on quasi‐static cyclic test

Quasi‐Static Cyclic Test on a Concrete‐Encased Frame‐Reinforced Concrete Tube Building Model

Progressive Collapse Analysis of SRC Frame-RC Core Tube Hybrid Structure

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