Masonry infill walls under blast loading using confined underwater blast wave generators (WBWG)

Pereira, João Miguel; Campos, J.; Lourénço, Paulo B.

doi:10.1016/j.engstruct.2015.02.036

Cited by 50 publications

(57 citation statements)

References 18 publications

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“…Underwater shock simulator, Cambridge University (Deshpande et al, 2006) Peak pressures (15-70 MPa); decay times (0.1-1.5 ms); the peak pressure and pulse duration can be adjusted WBWG, Portugal (Pereira et al, 2015) To test out-of-plane walls under dynamic loading; the shock wave in water is 4.5 times faster than in air, and the pressure-impulse for the shock wave in water is 15-20 times higher than in air A laboratory-scale buried charge simulator, Cambridge University (McShane et al, 2013) Internal diameter of 28 mm and height of 80 mm; to generate a flow of sand to mimic the buried explosive; the impact velocity of the sand can be up to 39 m/s DLG test, BakerRisk, USA (http:// www.bakerrisk.com/)…”

Section: Other Blast Simulatorsmentioning

confidence: 99%

Review of the current practices in blast-resistant analysis and design of concrete structures

Hao

et al. 2016

Advances in Structural Engineering

227

132

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In contemporary society, industrialization and rising of terrorism threats highlight the necessity and importance of structural protection against accidental and intentionally malicious blast loads. Consequences of these extreme loading events are known to be catastrophic, involving personnel injuries and fatalities, economic loss and immeasurable social disruption. These impacts are generated not only from direct explosion effects, that is, blast overpressure and primary or secondary fragments, but also from the indirect effects such as structural collapse. The latter one is known to be more critical leading to massive losses. It is therefore imperative to enlighten our structural engineers and policy regulators when designing modern structures. Towards a better protection of concrete structures, efforts have been devoted to understanding properties of construction materials and responses of structures subjected to blast loads. Reliable blast resistance design requires a comprehensive knowledge of blast loading characteristics, dynamic material properties and dynamic response predictions of structures. This article presents a state-of-the-art review of the current blast-resistant design and analysis of concrete structures subjected to blast loads. The blast load estimation, design considerations and approaches, dynamic material properties at high strain rate, testing methods and numerical simulation tools and methods are considered and reviewed. Discussions on the accuracies and advantages of these current approaches and suggestions on possible improvements are also made.

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Section: Other Blast Simulatorsmentioning

confidence: 99%

Review of the current practices in blast-resistant analysis and design of concrete structures

Hao

et al. 2016

Advances in Structural Engineering

227

132

View full text Add to dashboard Cite

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“…variables. Based on previous studies (Khalil, Etman, Atta, & Essam, 2016;Kupfer, Hilsdorf, & Rusch, 1969;Pereira, Campos, & Lourenço, 2015), CDP parameters were used to model the masonry and ECC sheet as they precisely account the nonlinear material behavior. It assumes that the failure of masonry and ECC can be modeled using the plasticity characteristics and response to uniaxial compression and uniaxial tension.…”

Section: Materials Modelmentioning

confidence: 99%

Out-of-plane response of ECC-strengthened masonry walls

Munjal

Singh

2020

Journal of Structural Integrity and Maintenance

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This paper focuses on the flexural behavior of masonry walls strengthened with precast engineered cementitious composite (ECC) sheet. The walls were subjected to out-of-plane static loading and analyzed using ABAQUS. For the validation of numerical results, four masonry walls of size 762 × 480 × 230 mm were cast using burnt clay bricks and cement mortar. Out of four, two masonry walls were strengthened with precast ECC sheet using epoxy as adhesive, and the remaining two acted as control specimens. The validation of numerical results with the experimental results shows that the model can effectively capture the nonlinear behavior of masonry and ECC to predict the strength and failure mechanism. The influence of mesh size on the numerical results is also reported. Further, a parametric study has been carried out to observe the effect of several parameters such as percentage of ECC reinforcement ratio, span/depth (L/d) ratio and width/thickness (b/h) ratio of the strengthened masonry walls. This study reveals that the precast ECC sheet increases the load-carrying capacity and ductility of brick masonry walls and hence demonstrates its performance as a strengthening element for brick masonry structures.

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“…However, hydraulic blasting involves complex blasting procedures and limitations are imposed on borehole sealing technology and equipment. For these reasons, the application of hydraulic blasting to coal mine production is not fully understood [13,16]. It is very urgent to improve the blasting technique in coal mine production, so as to achieve a low-cost, high-performance presplitting blasting effect of coal rocks.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study and Engineering Practice of Pressured Water Coupling Blasting

Yang

2017

Shock and Vibration

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Overburden strata movement in large space stope is the major reason that induces the appearance of strong mining pressure. Presplitting blasting for hard coal rocks is crucial for the prevention and control of strong pressure in stope. In this study, pressured water coupling blasting technique was proposed. The process and effect of blasting were analyzed by orthogonal test and field practice. Results showed that the presence of pressure-bearing water and explosive cartridges in the drill are the main influence factors of the blasting effect of cement test block. The high load-transmitting performance of pore water and energy accumulation in explosive cartridges were analyzed. Noxious substances produced during the blasting process were properly controlled because of the moistening, cooling, and diluting effect of pore water. Not only the goal of safe and static rock fragmentation by high-explosive detonation but also a combination of superdynamic blast loading and static loading effect of the pressured water was achieved. Then the practice of blasting control of hard coal rocks in Datong coal mine was analyzed to determine reasonable parameters of pressured water coupling blasting. A good presplitting blasting control effect was achieved for the hard coal rocks.

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Masonry infill walls under blast loading using confined underwater blast wave generators (WBWG)

Cited by 50 publications

References 18 publications

Review of the current practices in blast-resistant analysis and design of concrete structures

Review of the current practices in blast-resistant analysis and design of concrete structures

Out-of-plane response of ECC-strengthened masonry walls

Experimental Study and Engineering Practice of Pressured Water Coupling Blasting

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