Air blast resistance of full-scale slabs with different compositions: Numerical modeling and field validation

Castedo, Ricardo; Segarra, Pablo; Alañón, Alejandro; López, Lina M.; Santos, Anastasio P.; Sanchidrián, José A.

doi:10.1016/j.ijimpeng.2015.08.004

Cited by 90 publications

(49 citation statements)

References 30 publications

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“…To save computational time, and taking advantage of the symmetry conditions, only one half along the major axis of each slab is considered. More details about the model can be found in Castedo et al [15]. The explosive charge has been introduced into the model by the *Load_Blast_Enhanced (LBE) function.…”

Section: Figurementioning

confidence: 99%

See 1 more Smart Citation

Blast Effects on Structural Elements

Chiquito¹,

Santos²,

López³

et al. 2020

Fracture Mechanics Applications

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Blast loads can represent a great hazard to existing structures. Their effects on structural elements can be decisive for the integrity of both the structure itself and the people within it. The behaviour of the individual elements of a building is totally different due to the heterogeneity of the materials composing them. This fact makes it necessary to carry out tests on each type of structural element in order to correctly evaluate the response of the structure. In addition, the scale effect can produce inaccurate results, making it necessary for tests to be performed on a full scale to validate the results. In this work, the results of several tests with explosives are presented, in different constructive elements, all of them carried out at full scale. These elements range from the structural elements (beams and concrete slabs) to the weak elements of a building (masonry panels).

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Section: Figurementioning

confidence: 99%

“…shows the different parameters of damage calculated. A rank is also included for the assessment result, based on authors' experience and others[3,8,10,14,15], and considering d 200 and d A parameters, no damage, moderate or severe.…”

mentioning

confidence: 99%

Blast Effects on Structural Elements

Chiquito¹,

Santos²,

López³

et al. 2020

Fracture Mechanics Applications

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“…To make the concrete model more realistic, two steps have been taken to obtain reasonably the residual strength and the failure strain. Firstly, the residual yield stress should be changed [5]. From the formula of the residual surface, it is found that both and 1 control the final residual strength.…”

Section: Compression Softeningmentioning

confidence: 99%

“…At present, concerns about the safe living environment and the efficient protective structures and infrastructures are arising. The performance of concrete structures subjected to severe loading such as blast has been extensively studied in the last few decades [1][2][3][4][5]. Concrete is a brittle material which consists of cement paste, aggregates, and admixture (optional).…”

Section: Introductionmentioning

confidence: 99%

Advanced Concrete Model in Hydrocode to Simulate Concrete Structures under Blast Loading

Guo

2016

Advances in Civil Engineering

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The formulations of the advanced concrete RHT model adopted in AUTODYN are investigated and numerical studies are conducted to study the RHT model’s actual performances under various loading conditions. It is found that using of default values in the RHT model is not able to simulate the realistic behavior of concrete under various loading conditions. Thus modified parameters in the RHT model are proposed to better capture the realistic behavior of concrete under such loading conditions. Furthermore, numerical simulation of normal concrete slabs and multilayer concrete slabs subjected to blast loading is conducted using AUTODYN with both the default and modified RHT parameters. Experimental readings from field blast tests are used to validate the numerical model developed. It is shown that the results from numerical simulations using the modified RHT parameters and the measurements from the field blast test agree well in terms of damage pattern, crater diameter, and acceleration. Hence, it can be concluded that the RHT model with modified parameters can capture the mechanical behavior of concrete structures well. The validated model can be further used to conduct a parametric study on the influence of key parameters (i.e., compressive strength, fracture energy, and thickness) on blast resistance of concrete structure.

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“…In recent years, experimental investigations have been conducted with the objective of improving the blast-resistant performance of concrete slabs, without increasing the concrete strength or the number of reinforcement bars (Morishita et al 2004), and several researchers have reported the good performance of fiber-reinforced cementitious composites (FRCC) (Banthia et al 2004;Lan et al 2005;Coughlin et al 2010;Foglar and Kovar 2013;Ellis et al 2014;Pantelides et al 2014;Castedo et al 2015;Li et al 2016;Luccioni et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Effects of Fiber Type on Blast Resistance of Slurry-Infiltrated Fiber Concrete Under Contact Detonation

Morishima

Yamaguchi

Shibuya

et al. 2020

ACT

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When designing blast-resistant concrete members that are subject to contact detonation, it is necessary to reduce the spall damage due to tensile stress waves reflected from the back sides of the members. In a previous study, the authors confirmed the good spall-reducing performance under contact detonation of slurry-infiltrated fiber concrete (SIFCON), which is manufactured by first placing fibers into an empty mold and then infiltrating them with grout. In this study, to obtain SIFCON with further improved spall reduction, experimental investigations were conducted regarding the effects of different fiber types on the blast resistance of SIFCON slabs against contact detonation. Five types of steel fibers and four types of synthetic fibers were employed as reinforcing fibers. The thickness of the SIFCON slabs was fixed at 80 mm, and contact detonation tests were conducted using two amounts of SEP explosives. All of the SIFCON samples investigated reduced the spall damage due to contact detonation more effectively than normal concrete and other conventional fiber reinforced cementitious composites. Furthermore, by using SIFCON with fine straight steel fibers, the spall-limit thickness of the slab could be reduced by 54% or more.

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Air blast resistance of full-scale slabs with different compositions: Numerical modeling and field validation

Cited by 90 publications

References 30 publications

Blast Effects on Structural Elements

Blast Effects on Structural Elements

Advanced Concrete Model in Hydrocode to Simulate Concrete Structures under Blast Loading

Effects of Fiber Type on Blast Resistance of Slurry-Infiltrated Fiber Concrete Under Contact Detonation

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