Damage Assessment of Reinforced Concrete Structural Elements Subjected to Blast Load

Huang, Xin; Ma, Guowei; Li, J.C.

doi:10.1260/2041-4196.1.1.103

Cited by 19 publications

(16 citation statements)

References 23 publications

(42 reference statements)

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“…e results show that polymer coatings improve the ballistic resistance and explosive resistance of metal structures and buildings [2][3][4][5][6][7][8]. When brick wall or concrete structure collapses under the impact of explosive loading, the debris of bricks crush splash.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of Polyurea‐Coated Steel Plates at Underwater Explosive Loading

Dai

Wan

et al. 2018

Advances in Materials Science and Engineering

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To improve the survivability of ship structures at underwater explosion, thin steel plates coated with polyurea were used to investigate the blast protection effect. During the experimental tests of bare steel plates at different standoff, an appropriate distance was selected as the reference standoff to perform the tests of coated plates. Experimental tests of different coating locations (front versus back) and coating thickness were carried out to study the influencing factors of blast resistance for metal substrate plates. Compared with the bare steel plates, the polyurea coating was found to reduce the deformation of the test plates at blast tests in both cases of the front and back surface locations of the polyurea layer. An increase in the coating thickness also mitigates substantially the deformation of plates. In addition, the properties of the material and the substrate-coating bond strength may also affect the protective effect of the polyurea coating.

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Section: Introductionmentioning

confidence: 99%

“…When brick wall or concrete structure collapses under the impact of explosive loading, the debris of bricks crush splash. Once the surface of the wall or concrete structure was coated with polyurea, free flying of the fragments of the back face of such structures after blast was prevented [2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Polyurea‐Coated Steel Plates at Underwater Explosive Loading

Dai

Wan

et al. 2018

Advances in Materials Science and Engineering

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“…Therefore, it is often difficult and sometimes prohibitive to perform full-scale modeling of a structure to blast loadings. In practice, usually only an individual structural component, such as a column, a beam or a slab is modeled in detail [1][2][3]. Pressure-Impulse (P-I) curves of structural components are often developed to assess the performance of structural components subjected to blast loadings.…”

Section: I In Nt Tr Ro Od Du Uc Ct Ti Io On Nmentioning

confidence: 99%

“…S ST TR RU UC CT TU UR RE E C CO OM MP PO ON NE EN NT T R RE EL LI IA AB BI IL LI IT TY Y A AN NA AL LY YS SI IS S In reliability analysis, the structural system is considered in either of the two states, i.e., failure or safe state. These two states are defined by a performance function g(X) as [31], (1) where g(X) = 0 is a limit state surface separating the safe and unsafe states, X is a random vector of uncertain variables in the system. The failure probability of the system can be calculated by (2) in which f x (x) is the joint probability density function of the variables in X, including loading and resistance variables, in the system.…”

Section: I In Nt Tr Ro Od Du Uc Ct Ti Io On Nmentioning

confidence: 99%

RC Column Failure Probabilities to Blast Loads

Hao

Stewart

et al. 2010

International Journal of Protective Structures

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A AB BS ST TR RA AC CT T Structural reliability analyses are commonly applied to estimation of probabilities of structural damage to static and dynamic loads such as earthquake, wind and wave loads. Although blast loadings acting on structures from accidental explosions or hostile bombings are very difficult to be accurately predicted owing to many uncertain parameters that influence explosion shock wave propagation and shock wave interaction with structures, reliability analyses of structural failure to blast loadings with consideration of uncertainties in blast loading and structural parameters are very limited. Instead, a large safety factor is usually used to account for uncertain variations in blast loading and structural parameters in blast-resistant design and analysis. This may lead to an inaccurate design of structures to resist blast loads, and an inaccurate assessment of structure performance in a given explosion scenario. In this study, reliability analyses of three example RC columns to randomly varying blast loads are carried out. The column dimensions, reinforcement ratios and material strengths are assumed to be normally distributed with the respective design parameters as the mean values. The mean value and standard deviation of the peak reflected pressure and duration of the blast load at various scaled distances are derived from available empirical formulae, and are used in this study to model the blast pressure variations. Failure probabilities of the example RC columns subjected to blast loads of different scaled distances are estimated. Numerical results are compared with those obtained with the deterministic blast loading or deterministic column property assumptions. The importance of considering the random variations of structural properties and blast loadings in assessing the blast load effects on RC columns is discussed. K Ke ey y w wo or rd ds s: : RC Column, Blast Load, P-I Curve, Random Variation, Reliability, Failure Probability

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“…Later, Ma et al [15] extended the MAM and P-I diagram method by decoupling soil-structure interaction to study underground box-shaped structure response against internal and external blast loads. The influences of nonlinear resistance-deformation relationship of materials, nonlinear soil-structure interaction parameters, and pulse shapes on P-I diagram based on the MAM were further discussed in [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Damage Assessment of Two-Way RC Slab Subjected to Blast Load Using Mode Approximation Approach

Huang

Bao²,

Hao

et al. 2017

Int. J. Str. Stab. Dyn.

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Significant research efforts have been invested on studying the response and damage of structures subjected to blast loads for better life and property protections. The single-degree-of-freedom (SDOF) approach has been widely adopted to simplify the structural response analysis for engineering design purpose. However, such an approach under certain circumstances oversimplifies the structural behavior and might not give reliable predictions of structural responses to blast loads. On the other hand, although detailed high fidelity finite element (FE) approach is able to give relatively accurate predictions of structural response, it is unfortunately not straightforward for application and very time-consuming, which impedes its application among engineers. Therefore, a method that can assure not only reliability but also efficiency is highly needed for design practice. In the present study, mode approximation method with Pressure–Impulse (P-I) diagrams is applied to analyze response and damage of RC slab due to blast load. Slab under analysis is assumed rigid-plastic and simply supported. Shear failure, bending failure and combined failure modes are considered based on different failure modes. Critical equations for structural shear and bending failures are derived respectively with appropriate failure criteria. P–I diagrams are then developed for quick damage assessments. The analytical results are verified by comparing with high fidelity numerical simulations. The reliability and efficiency of using this approach for design and analyzing RC slab response under blast loads are demonstrated.

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Damage Assessment of Reinforced Concrete Structural Elements Subjected to Blast Load

Cited by 19 publications

References 23 publications

Experimental Investigation of Polyurea‐Coated Steel Plates at Underwater Explosive Loading

Experimental Investigation of Polyurea‐Coated Steel Plates at Underwater Explosive Loading

RC Column Failure Probabilities to Blast Loads

Damage Assessment of Two-Way RC Slab Subjected to Blast Load Using Mode Approximation Approach

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