Numerical Modeling of Concrete-Filled Double-Skin Steel Square Tubular Columns under Blast Loading

Zhang, Fangrui; Wu, Chengqing; Zhao, Xiao Ling; Li, Zhongxian; Heidarpour, Amin; Wang, Hongwei

doi:10.1061/(asce)cf.1943-5509.0000749

Cited by 43 publications

(13 citation statements)

References 30 publications

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“…[ Figure- 1] shows the primary features that define a Pressure-Impulse diagram. As observed, each Pressure-Impulse diagram has two asymptotes: impulsive asymptote and pressure asymptote.…”

Section: Pressure-impulse Diagrammentioning

confidence: 99%

“…Due to the increasing threat of terrorist attacks over the world in recent years, much research has been conducted to protect the important structures also to reduce human casualties from blast loads [1]. To ensure the safety of these structures, it is important to design them for levels of strength and ductility that would be adequate to resist the expected loads.…”

Section: Introductionmentioning

confidence: 99%

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Behavior of Steel Hollow Sections Under Blast Load

Fekry

Nassr

Ahmed

et al. 2020

Journal of Advanced Engineering Trends

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Steel hollow section (SHS) tubular members have been widely used in the construction, infrastructure, onshore, offshore, mining, protective and security industries. Thus, strengthening of steel hollow tubular members is required to safely carry the dynamic loads to increase the security demands when the accidents, intentional impact, or explosive events occurred. In this paper, a finite element analysis tool, LS-DYNA is utilized to study the behaviors of (SHS) beam under a uniform transverse blast load. The explosive loads were sufficient in magnitude to cause plastic deformation of the cross-section (local deformation) and plastic flexural deformation of the overall member (global deformation). Different parameters were studied to investigate the effects of beam depth (H), beam width (B), support condition and axial load on the failure mode. The obtained displacement-time history from each simulation was recorded and compared. A numerical method for deriving pressure-impulse (P-I) diagrams for (SHS) beam, which subjected to transient loads are described in this paper, which can be applied in the preliminary design of protective structures to establish safe response limits based on the given blast-loading. The proposed model of (P-I) diagrams exhibited a good accuracy in predicting the pressureimpulse diagram to design the (SHS) beam under the extreme loads.

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“…[ Figure- 1] shows the primary features that define a Pressure-Impulse diagram. As observed, each Pressure-Impulse diagram has two asymptotes: impulsive asymptote and pressure asymptote.…”

Section: Pressure-impulse Diagrammentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Behavior of Steel Hollow Sections Under Blast Load

Fekry

Nassr

Ahmed

et al. 2020

Journal of Advanced Engineering Trends

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“…Even though, the concrete confining stress is found to be lesser in CFDST compared to CFST sections under axial compression, the absolute strength and stiffness are higher due to its high steel area ratio. Further, CFDST has many practical advantages over CFST, by possessing large member ductility [10,11], fire and corrosion resistance [12,13], and ease in connection design [14,15].…”

Section: Introductionmentioning

confidence: 99%

Investigations on global buckling behaviour of concrete-filled double-skinned steel tubular columns

Sulthana

Jayachandran

2018

Proceedings 12th International Conference on Advances in Steel-Concrete Composite Structures - ASCCS 2018

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Concrete-Filled Double-skinned Steel Tubular columns (CFDST) are proved to possess exceptional structural resistance in case of fire and multi-hazard situations. This superior quality of CFDST makes it preferable in long column applications. However, studies on the long column behaviour of CFDST is very few, and their results are not in line with the behaviour of CFST long columns. Whereas, several researches on stub column CFDST shows that, the axial compression behaviour of CFDST is similar to CFST. In this paper, selected results (4 numbers of circular CFDST specimens) from a large test data is presented. Axial compression behaviour of long column CFDST specimens is studied, with non-dimensional slenderness λ around 1.0, and hollowness ratio as the governing parameter for study. Test results namely, axial load carrying capacity, axial deformation and lateral deflection are presented in this paper. Numerical models are also developed and validated with the experimental results, to carry out more parametric studies. Further, the experimental axial capacity values are compared with modified capacity equations from EC4 and AISC. Results show that extended EC4 and AISC equations gives conservative predictions for CFDST column even in the long column range. Moreover, the initial imperfections in the specimen and their corresponding boundary conditions for load application, are found to be governing parameters in long column buckling study.

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“…Further, CFDST columns have been used in electric transmission towers in China [3]. They are predicted to perform well under blast load [4], impact load [5] and in the instance of fire, they show better structural response due to the presence of concrete encased inner tube [6]. The inner steel tube also plays an important role in mitigating a rupture failure when ultra-high strength materials are used [7].…”

Section: Introductionmentioning

confidence: 99%