Fragility of Steel Frame Buildings under Blast Load

Khan, Sameer; Saha, Sandip Kumar; Matsagar, Vasant; Hoffmeister, Benno

doi:10.1061/(asce)cf.1943-5509.0001016

Cited by 27 publications

(9 citation statements)

References 12 publications

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“…Structural blast fragility describes the likelihood of damage due to uncertain blast load. The blast fragility for a structure is mathematically defined as the conditional probability of failure of the structure under specific blast load [13].…”

Section: Fragility Assessmentmentioning

confidence: 99%

“…The fragility curves showed that the RC frame designed for resisting highest seismic load performed most better in case of blast load. Khan et al [13] performed the blast fragility analysis of steel structure having different configurations in SAP2000. They used Monte-Carlo simulation for generating random weight of charge (TNT) and performed the analysis for a fixed stand-off distance.…”

Section: Introductionmentioning

confidence: 99%

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Blast Vulnerability of Multi-Storey Masonry Infill Reinforced Concrete Frames

Shamim¹,

Ahmad²,

Khan³

2021

cea

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The prototype or experimental study of blast effect on structures is not always possible due to high risk of life and environmental wellbeing. However, advancement in computational science had made it possible to solve such complex and risky problems. Researchers in the past few decades have presented ample computational and numerical studies on blast effect on masonry structure using deterministic approach. The studies have neglected the effect of various uncertainties that may perhaps occur during an actual blast scenario. Therefore, in present study probabilistic Finite Element (FE) analysis was performed on three statistically stable masonry infill RC (Reinforced Concrete) frames having single (G+0), two (G+1) and three (G+2) storey levels respectively to arrive at the blast fragility curves. The probability of failure was computed based on the inelastic tension damage curves developed for the masonry. The effect of scaled distance and different storey levels on blast vulnerability of masonry infill RC frame walls are investigated through these fragility curves. The results indicate a noteworthy effect of scaled distance and storey levels on the blast resistance of the structure. Frame G+0 is found to be comparatively more vulnerable against the blast load effect than other multi-storey frames. The critical value of scaled distance (Z critical ) corresponding to PF 90% in panel P1 was found as 6.67m/kg 1/3 , 4.81m/kg 1/3 and 4.66m/kg 1/3 respectively of frames G+0, G+1 and G+2; in panel P2 was found as 4.3m/kg 1/3 and 4.6m/kg 1/3 respectively of frames G+2 and G+3 and; in panel P3 was found as 4.32 m/kg 1/3 of frame G+3. It is also observed that RC frame is negligibly affected with respect to the masonry panel in terms of blast load mitigation.

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Section: Fragility Assessmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Blast Vulnerability of Multi-Storey Masonry Infill Reinforced Concrete Frames

Shamim¹,

Ahmad²,

Khan³

2021

cea

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“…Modeling of rock. The rock domain is modeled using the Drucker-Prager plasticity criterion which is a strain rate-dependent model (Khan et al, 2017). The yield criteria for the rock domain is given by SDS: steel-dytherm-steel; SPS: steel-polyurethane-steel; SAS90: steel-aluminum cenosphere syntactic foam 90 µmsteel; SAS200: steel-aluminum cenosphere syntactic foam 200 µm-steel.…”

Section: Constitutive Materials Propertiesmentioning

confidence: 99%

“…The rock domain is modeled using the Drucker–Prager plasticity criterion which is a strain rate–dependent model (Khan et al, 2017). The yield criteria for the rock domain is given by…”

Section: Fe Modeling and Materials Propertiesmentioning

confidence: 99%

Vulnerability analysis of tunnel linings under blast loading

Chaudhary

Mishra

Chakraborty

et al. 2018

International Journal of Protective Structures

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In the present study, a comparative assessment on the performance of conventional and advanced tunnel lining materials subjected to blast loading is done using a three-dimensional non-linear finite element analysis procedure. The conventional tunnel lining materials analyzed herein are plain concrete, steel, reinforced cement concrete, and steel fiber-reinforced concrete. The advanced tunnel lining materials analyzed herein are dytherm, polyurethane, and aluminum syntactic foam sandwich panels with steel-foam-steel composites. The pressure generated by 10 kg Trinitrotoluene (TNT) is applied to each element on the inner wall of the tunnel which has an effect equal to the scaled distance Z = 1.16 m/kg 1/3. Analyses are conducted by varying the thickness of lining materials for a tunnel built in rock domain. The response of the tunnel lining materials, for example, deformation, stresses, and strains generated at different interfaces, is compared with each other to assess the best suitable material for the present blast scenario discussed herein. It is observed from the simulations that the reinforced cement concrete and steel-aluminum syntactic foam (90 µm)-steel are found to be the suitable tunnel lining materials for the present blasting scenario described herein. Moreover, a set of probabilistic analysis is also performed for the suitable tunnel lining materials decided through deterministic analyses using Monte Carlo simulations. The results obtained are normal random distribution curves depicting the extent of deformation in lining materials. A probability failure curve is also proposed for the suitable lining materials.

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“…The shear demand experienced at the initial stage was calculated [13]. The steel frame building with different configurations are charge weight as an uncertain parameter, detonation location, standoff distance, and column orientation on the fragility of the steel frame buildings under blast load are analyzed [14].The numerical simulations of the perforated steel column with blast load are analyzed by using the FE software of the LS-DYNA [15]. The new numerical method is developed for the analysis the structure exposed to blast wave obtained from the large TNT explosives.…”

Section: Introductionmentioning

confidence: 99%

Response Control of Structures with Friction Dampers under Blast Loading

Kiran¹,

Farsangi²

2021

TOCIEJ

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Introduction: This study investigates the performance of the surface blast load acting on Moment Resistance Frames (MRF)with a novel slip load friction damper. Recently the world is facing terrorist activities that lead to the damage of the structures, including commercial, industrial, and public buildings. Methods: These structures should be protected by using control devices. Friction damper is a passive damping device that absorbs maximum energy released during vibrations. Blast loads are calculated based on empirical equations.In this study, single slip and double slip load friction dampers considering the hysteresis loops are used for controlling the response of the MRFs exposed to blast loadings. Results: The four storey, eight storey, and twenty storey MRFs with surface blast responses are controlled by using single and double slip load friction dampers. The response includes displacement, accelerations, velocity, storey drift, storey drift ratio, pressure impulse curve, etc. The torsional effect with two dimensions is considered for the high-rise structure as well. Conclusion: It was concluded that using friction dampers plays a vital role in controlling the response of MRFsunder blast loadings.

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Fragility of Steel Frame Buildings under Blast Load

Cited by 27 publications

References 12 publications

Blast Vulnerability of Multi-Storey Masonry Infill Reinforced Concrete Frames

Blast Vulnerability of Multi-Storey Masonry Infill Reinforced Concrete Frames

Vulnerability analysis of tunnel linings under blast loading

Response Control of Structures with Friction Dampers under Blast Loading

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