Reliability of Concrete Masonry Unit Walls Subjected to Explosive Loads

Eamon, Christopher D.

doi:10.1061/(asce)0733-9445(2007)133:7(935)

Cited by 38 publications

(24 citation statements)

References 29 publications

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“…ese research findings have achieved the prediction and evaluation of pressure loads caused by internal explosions. In terms of mechanism research, studies on the reflected shock wave mainly included the theoretical calculation of multiple reflected shock waves [14][15][16] as well as the interaction between the shock wave and a confined space [17][18][19][20]. Studies on quasistatic pressure mainly covered the calculation of the load parameters of the quasistatic pressure [21][22][23], the effect of postcombustion on the quasistatic pressure [24][25][26][27], and the effect of the shape and structure of the pressure relief hole on the quasistatic pressure [28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Pressure Load Characteristics of Nonideal Explosives in a Simulation Cabin

Wang

Zhang

2019

Shock and Vibration

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In this study, an aluminum-containing charge was exploded in an enclosed simulation cabin to explore the characteristics of two types of damaging pressure loads formed by internal explosions: the first incident shock wave and the quasistatic pressure. A high-frequency piezoelectric sensor was used to measure the first incident shock wave and a low-frequency piezoresistive sensor was used to measure the quasistatic pressure. After obtaining effective experimental data, the experimental results were compared with the values obtained by the classical calculation model. The results show that the pressure loads generated by the internal explosions from the ideal explosive and the aluminum-containing explosive share similar load characteristics, given the same mass and benchmark explosive. The difference between the two explosives primarily lies in the amplitude of the load parameters. The aluminum-containing explosive has lower first incident shock wave and higher quasistatic pressure than that of the ideal explosive. For the peak overpressure of the first incident shock wave, the explosion shock wave load parameters of the aluminum-containing explosive, which are calculated based on the explosion heat theory, are higher than the measured values. The peak quasistatic overpressure is directly related to the total energy released by the explosion; however, they are hardly correlated with the reaction process. Therefore, the aerobic postcombustion reaction of the aluminum-containing explosive does not affect the analysis and calculation of the peak quasistatic overpressure. As a result, given the heat value of the explosive, the peak quasistatic overpressure of the explosive can accurately be obtained.

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Section: Introductionmentioning

confidence: 99%

Pressure Load Characteristics of Nonideal Explosives in a Simulation Cabin

Wang

Zhang

2019

Shock and Vibration

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“…Also, an increase in the number of the fixed edges or wall thickness causes a reduction in the maximum deflection of the wall. A sensitivity analysis for CMU walls was considered in a study by Eamon [11]. Here, a chart was presented to identify variables significantly affecting the wall behavior at three different hazard levels.…”

Section: Introductionmentioning

confidence: 99%

Dynamic interface model for masonry walls subjected to high strain rate out-of-plane loads

Rafsanjani

Lourenço

Peixinho

2015

International Journal of Impact Engineering

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The present study proposes a dynamic constitutive material interface model that includes non-associated flow rule and high strain rate effects, implemented in the finite element code ABAQUS as a user subroutine. First, the model capability is validated with numerical simulations of unreinforced block work masonry walls subjected to low velocity impact. The results obtained are compared with field test data and good agreement is found. Subsequently, a comprehensive parametric analysis is accomplished with different joint tensile strengths and cohesion, and wall thickness to evaluate the effect of the parameter variations on the impact response of masonry walls.

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“…Only very few probabilistic and reliability analyses have been carried out for infrastructure systems subject to explosive blast loading (eg. Twisdale et al, 1994;Low & Hao, 2001;2002;Eamon, 2007;Hao et al, 2010). This is in contrast to the approach that has been used very widely and successfully for other man-made and natural hazards (eg.…”

Section: Introductionmentioning

confidence: 99%

Probabilistic terrorism risk assessment and risk acceptability for infrastructure protection

Stewart¹,

Netherton²,

Shi³

et al. 2012

AJSE

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In the decade since the events of 9/11 there has been renewed interest in understanding the risks of terrorism, and the effectiveness of counter-terrorism measures. Since there is uncertainty associated with terrorist threats, structural and system response, effectiveness of counter-terrorism and protective measures, and terrorists' ability to infl ict damage, then there is clearly a need for probabilistic approaches to assessing and mitigating terrorism risks. The paper reviews research projects related to probabilistic terrorism risk assessment and risk acceptability for infrastructure protection currently underway at The University of Newcastle. The review of probabilistic risk assessments are given for: (i) IED design and initiation, and predicting variability of time-pressure load history on infrastructure; (ii) reinforced-concrete structural systems; (iii) fullbody scanners used at airports in the United States; and (iv) buildings subject to a terrorist vehicleborne improvised explosive device. The illustrative examples will highlight research capabilities at the University of Newcastle and identify research challenges to be faced in the future.

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Reliability of Concrete Masonry Unit Walls Subjected to Explosive Loads

Cited by 38 publications

References 29 publications

Pressure Load Characteristics of Nonideal Explosives in a Simulation Cabin

Pressure Load Characteristics of Nonideal Explosives in a Simulation Cabin

Dynamic interface model for masonry walls subjected to high strain rate out-of-plane loads

Probabilistic terrorism risk assessment and risk acceptability for infrastructure protection

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