Blast response of polymer-retrofitted masonry unit walls

Wang, Junguo; Ren, Haigang; Wu, Xiangyun; Cai, Canliu

doi:10.1016/j.compositesb.2016.02.044

Cited by 87 publications

(18 citation statements)

References 13 publications

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“…The wall specimens with dimensions of 3 × 2 × 0.12 m were lumped with clay blocks with dimensions of 240 × 115 × 53 mm and 10-mm-thick mortar in a "running" pattern, as shown in Figure 2. Large wall dimensions were selected to avoid scale effects and to reflect the actual performance of a reinforced masonry unit wall under blast loading [15].…”

Section: Wall Specimensmentioning

confidence: 99%

“…Therefore, it was adopted for the clay bricks and mortar in this study. The parameters of the blocks and mortar used in the numerical simulations are listed in Table 2 [15,[17][18][19][20]. The MAT PIECEWISE LINEAR PLASTICITY material model was used for the polyurea coating.…”

Section: Materials Parametersmentioning

confidence: 99%

“…The masonry wall tests conducted by the Air Force Research Laboratory (AFRL) indicated that the spray-on polymer approach could overcome these issues, and the ability of the material to absorb strain energy was a key factor in the effectiveness toward preventing intrusion of wall fragments into occupant areas [13,14]. A series of impact tests were performed by Wang et al [15] to investigate the dynamic impact responses of walls strengthened with spray-on polyurea. The test results suggested that the presence of a polyurea layer could transform the collapse of an unreinforced wall into local mortar joint separation and the development of flexure in the walls.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Study of Polymer-Retrofitted Masonry Walls under Gas Explosions

Gu¹,

Ling²,

Wang³

et al. 2019

Processes

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Unreinforced masonry walls are extensively used in the petrochemical industry and they are one of the most vulnerable components to blast loads. To investigate the failure modes and improve the blast resistances of masonry walls, four full-scale field tests were conducted using unreinforced and spray-on polyurea-reinforced masonry walls subjected to gas explosions. The results suggested that the primary damage of the unreinforced masonry wall was flexural deformation and the wall collapsed at the latter stage of gas explosion. The presence of polyurea coatings could effectively improve the anti-explosion abilities of masonry walls, prevent wall collapses, and retain the flying fragments, which would reduce the casualties and economic losses caused by petrochemical explosion accidents. The bond between the polymer and masonry wall was critical, and premature debonding resulted in a failure of the coating to exert the maximum energy absorption effect. A numerical model for masonry walls was developed in ANSYS/LS-Dyna and validated with the test data. Parametric studies were conducted to explore the influences of the polyurea-coating thickness and spray pattern on the performances of masonry walls. The polyurea-coating thickness and spray pattern affected the resistance capacities of masonry walls significantly.

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Section: Wall Specimensmentioning

confidence: 99%

Section: Materials Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Experimental and Numerical Study of Polymer-Retrofitted Masonry Walls under Gas Explosions

Gu¹,

Ling²,

Wang³

et al. 2019

Processes

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“…Polyurea is an elastomer commonly used in a variety of applications for its water, abrasion, and chemical resistance. Polyurea appears to be an effective retrofitting technique because it usually reduces the fragmentation of the masonry wall [9,10,12,14,[20][21][22]. Generally, researchers chose to apply it as a spray-on material to the interior face of the wall.…”

Section: Polyureamentioning

confidence: 99%

“…Wang et al [12] performed explosive tests on 6 walls, 4 of which were constructed out of 24 × 11.5 × 5.3 cm clay bricks. The other 2 were constructed out of 20 × 20 × 60 cm aerated concrete blocks.…”

Section: Polyureamentioning

confidence: 99%

Blast Protection of Unreinforced Masonry Walls: A State-of-the-Art Review

Lantz

Maynez

Cook

et al. 2016

Advances in Civil Engineering

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The recent rise of terrorist attacks has reinforced the need for mitigation of damage caused by blast loading on unreinforced masonry walls. The primary goal of the techniques is to prevent the loss of life while simultaneously preserving the integrity of the structure. This paper presents a compilation of recently available literature on blast protection of unreinforced masonry walls. It seeks to present the state of the art in this field, including mitigation techniques considered as well as testing methods selected. Fiber reinforced polymers and polyurea are the two dominant retrofitting techniques being assessed in the field. Other techniques include but are not limited to polyurethane, steel sheets, and aluminum foam. Since there is no widely implemented standard for blast loading test procedures, direct comparisons between the efficiencies of the mitigation techniques proposed are not always feasible. Although fragmentation is an indicator of the efficiency of retrofits, it is currently measured by subjective observation of postblast debris.

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Rocket blast resistance of the fully demountable high performance FRC tongue and groove blocks

Bozkurt,

Genç,

Anil

et al. 2023

Structural Concrete

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Within the scope of this study, the design and testing of a fully demountable high‐performance fiber‐reinforced concrete (FRC) barriers with high resistance to sudden dynamic explosion and impact loadings is investigated. In order to solve such an engineering problem, a special FRC “tongue and groove” blocks are designed in a way that could be constructed by two persons to form barriers of various shapes and sizes by combining them easily. The structures produced with these blocks were produced using a hybrid, special FRC mixture in order to resist various bullets, rocket launchers, and explosion effects to protect the person behind them. Within the scope of this study, the resistance of five different special FRC mixtures with different properties against sudden dynamic blasting effects was determined by comparing and interpreting the acceleration‐time and strain‐time measurements taken from the wall directly. The results obtained from the dynamic blasting tests carried out in the field were compared with the results of the numerical analysis performed using the Ls‐Dyna finite element software. As a result of the study, the barrier structure produced with special FRC, in which hybrid nylon and steel fibers are used as reinforcement, exhibited the most successful results for absorbing the energy caused by the rocket blast loadings.

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Blast response of polymer-retrofitted masonry unit walls

Cited by 87 publications

References 13 publications

Experimental and Numerical Study of Polymer-Retrofitted Masonry Walls under Gas Explosions

Experimental and Numerical Study of Polymer-Retrofitted Masonry Walls under Gas Explosions

Blast Protection of Unreinforced Masonry Walls: A State-of-the-Art Review

Rocket blast resistance of the fully demountable high performance FRC tongue and groove blocks

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