Experimental study of CFDST columns infilled with UHPC under close-range blast loading

Zhang, Fangrui; Wu, Chengqing; Zhao, Xiao‐Ling; Xiang, Hengbo; Li, Zhong Xian; Fang, Qin; Liu, Zhongxian; Zhang, Yadong; Heidarpour, Amin; Packer, Jeffrey A.

doi:10.1016/j.ijimpeng.2016.01.011

Cited by 78 publications

(31 citation statements)

References 28 publications

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“…Zhang et al [20] Column Field CFDST infilled with UHPC 1:1 Zhang et al [21] Column Field CFDST 1:1 Codina et al [22] Building column Field RC + reinforced resin panels 1:1 Yuan et al [23] Bridge column Field RC 1:3 Wang et al [24] Building column Field CFST 1:1…”

Section: Experimental Testingmentioning

confidence: 99%

Blast Loaded Columns—State of the Art Review

Lukić¹,

Draganić²

2021

Applied Sciences

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The ever-present threat of terrorist attacks in recent decades gives way to research towards blast-resistant design of structures. Columns, as one of the main load-bearing elements in residential buildings and bridges, are becoming interesting targets in bombing attacks. Research of column blast load behavior leads toward increased safety by identifying shortcomings and problems of those elements and acting accordingly. Field tests and numerical simulations lead to the development of new blast load mitigation technics, either in the design process or as a retrofit and strengthening of existing elements. The article provides a state-of-the-art literature review of filed blast load tests and numerical simulations of a bridge and building columns.

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Section: Experimental Testingmentioning

confidence: 99%

Blast Loaded Columns—State of the Art Review

Lukić¹,

Draganić²

2021

Applied Sciences

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“…Mazurkiewicz et al [57] proposed that not only the mass of the detonated charge has an influence on the structural behavior, however, its shape and the initiation point of detonation, which can significantly change the extent of the structural damage. Zhang and Zhao [58] stated that the increase in explosive charge weight caused a larger mid-span deflection, with this effect being more noticeable on axial-load-free specimens rather than axially-loaded specimens. Based on the literature, the spall length in the reinforced concrete beam is influenced by the charge weight, see Table 3 however the information about the behavior of the beam was found to be limited and the study requires detailed investigations.…”

Section: Literature On the Experimental Studiesmentioning

confidence: 99%

A review on the performance of reinforced concrete structures under blast loading

Senthil¹,

Gupta²,

Rupali³

et al. 2020

JSEAM

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An explosion on the elevated structures caused by terrorist activities or manmade events can induce significant deformations in the Civil Engineering structures. Therefore, it is necessary to review the response of the structural behavior such as reinforced concrete slab, reinforced concrete beams, and columns. On the basis of this objective, a detailed literature review is conducted to understand the scope for protecting such structures and the structural behavior under blast loading. Based on the detailed literature survey, the investigations about the behavior of conventional reinforced concrete columns and slab initiated in 2005 however, the behavior of reinforced concrete beam was focused since the year 2010. Also, the literature reveals that the investigations on structural elements using analytical techniques are limited in comparison to experiments and simulations. In addition to that, the response of the structural elements was predicted and the trend was calibrated and fitted logarithmically with the experimental results. The predicted spall diameter in the reinforced concrete slab is 0.95 m corresponding charge weight of 100 kg however the influence of spalling was found to be negligible after the 100 kg of charge weight. The predicted spall length in the reinforced concrete beam is 1.6 m corresponding charge weight of 100 kg and the effect may be negligible after 100 kg of charge weight. The predicted deflection in the reinforced concrete columns is 30 mm corresponding to a peak reflected impulse of 1000 MPa-ms, whereas the deflection was found to be negligible after the 1000 MPa-ms of peak reflected impulse.

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“…Several numerical and experimental studies have been conducted to assess composite sections under different loading scenarios. Zhang et al [ 6 ] investigated concrete-filled double-skin (CFDS) tubes and observed superior performance compared to a RC column under near field blast loading. Four circular and seven square columns were tested.…”

Section: Introductionmentioning

confidence: 99%

Structural Response of Steel Jacket-UHPC Retrofitted Reinforced Concrete Columns under Blast Loading

et al. 2021

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The lateral capacity of exterior concrete columns subjected to a blast load is the key factor in the building collapse probability. Due to potentially severe consequences of the collapse, efforts have been made to improve the blast resistance of existing structures. One of the successful approaches is the use of ultra-high-performance-concrete (UHPC) jacketing for retrofitting a building’s columns. The columns on the first floor of a building normally have higher slenderness due to the higher first story. Since an explosion is more likely to take place at the ground level, retrofitting the columns of the lower floors is crucial to improve a building’s blast resistance. Casting a UHPC tube around a circular reinforced concrete (RC) column can increase the moment of inertia of the column and improve the flexural strength. In this study, a retrofitting system consisting of a UHPC layer enclosed by a thin steel jacket is proposed to improve the blast resistance of buildings in service. Most of the previous research is focused on design aspects of blast-resistant columns and retrofitting systems are mostly based on fiber reinforced polymers or steel jackets. A validated finite element (FE) model is used to investigate the effectiveness of this method. The results showed significant improvement both at the component and building system levels against combined gravity and blast loading.

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Experimental study of CFDST columns infilled with UHPC under close-range blast loading

Cited by 78 publications

References 28 publications

Blast Loaded Columns—State of the Art Review

Blast Loaded Columns—State of the Art Review

A review on the performance of reinforced concrete structures under blast loading

Structural Response of Steel Jacket-UHPC Retrofitted Reinforced Concrete Columns under Blast Loading

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