Modeling of simultaneous ground shock and airblast pressure on nearby structures from surface explosions

Wu, Chengqing; Hao, Hong

doi:10.1016/j.ijimpeng.2004.03.002

Cited by 192 publications

(111 citation statements)

References 14 publications

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“…Figure 2B is relative error of fitted data for overpressure and it shows the maximum error is about 7%. Figure 3 is the comparison of the peak overpressure between the present model and the previous engineering equations [2][3][4][5][6][7] and some experiments in literature [11,12].…”

Section: R(m)mentioning

confidence: 99%

“…There are a lot of models such as Henrych [5], Wu and Hao [7] and Borgers and Vantomme ) to determine the attenuation coefficient  . But we cannot obtain good results by using these models of  in the previous literature.…”

Section: Attenuation Coefficient Of Overpressurementioning

confidence: 99%

“…Based on analysis of experiments Friedlander [1] presented a strong practical model that the overpressure distribution in time at the positive phase zone is t and  are crucial in importance for describing overpressure distribution and many researchers persevered in improving the computational model of them [2][3][4][5][6][7][8][9][10]. As peak overpressure , s p  a lot of engineering equations have been presented based on experiments or numerical simulation [2][3][4][5][6][7]. Among them, Henrych [5] and Kinney and Grahma [6] showed consistent results with test data for nearly all the range of the scaled distance.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Studying an engineering model on an air blast wave

Wang¹,

Gong²,

Xiong³

et al. 2014

WIT Transactions on the Built Environment

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This paper presents a new engineering model on the air blast wave of TNT explosive. The model is built and the parameters are calibrated based on numerical simulated pressure time data of shock wave in air. The model describes the peak overpressure, impulse, typical time and attenuation coefficient of the shock wave with new computational equations. Comparison of pressure configuration for the scaled distance shows that the present engineering model can give consistent results with the numerical code and experiments.

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Section: R(m)mentioning

confidence: 99%

Section: Attenuation Coefficient Of Overpressurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Studying an engineering model on an air blast wave

Wang¹,

Gong²,

Xiong³

et al. 2014

WIT Transactions on the Built Environment

View full text Add to dashboard Cite

show abstract

“…Non-linear dynamic numerical analyses [9] verify that the value of the attenuation exponent is associated with the propagation of P waves in the near field and Rayleigh waves in larger distances, as suggested by the analytical solution. However, the numerically predicted attenuation rates depend on the soil characteristics, and are much larger than the analytically predicted ones [9,10].…”

Section: A U T H O R ' S P E R S O N a L C O P Ymentioning

confidence: 99%

Analytical calculation of blast-induced strains to buried pipelines

Kouretzis

Bouckovalas

Gantes

2007

International Journal of Impact Engineering

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The aim of this paper is to introduce a robust methodology for the analytical calculation of strains in flexible buried pipelines due to surface point-source blasts. Following a brief bibliographic overview regarding the characteristics of ground waves produced by surface explosions, a method used to model wave propagation with radial attenuation and spherical front is presented. Strains due to P-and Rayleigh waves, which dominate the waveform generated by an explosion, are accordingly calculated by modeling the pipeline as a three-dimensional (3-D) cylindrical thin shell and ignoring soil-structure interaction. To simplify the design procedure, a set of easy-to-use relations for the calculation of maximum strains and their position along the pipeline axis is supplied. The derived expressions are evaluated through comparison against 3-D dynamic numerical analyses, field strain measurements in flexible pipelines due to a series of full scale blasts, and state-of-practice design methods. Comparisons show that the proposed methodology provides improved accuracy at no major expense of simplicity, as well as the advantage of properly accounting for the effect of local soil conditions. r

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“…The airblast loads estimated from a previous study are used in the present study [25]. Figure 11(a) and (b) show two typical airblast pressure time histories obtained from a surface explosion.…”

Section: Numerical Application Of the Homogenized Masonry Modelmentioning

confidence: 99%

Derivation of 3D masonry properties using numerical homogenization technique

Hao

2006

Numerical Meth Engineering

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SUMMARYLots of research work has been conducted on homogenization technique, which derives global homogenized properties of masonry from the behaviour of the constitutive materials (brick and mortar). Such a technique mainly focused on two-dimensional media in the previous studies with the out-ofplane properties of masonry material neglected. In this paper, homogenization technique and damage mechanics theory are used to model a three-dimensional masonry basic cell to numerically derive the equivalent elastic properties, strength envelope, and failure characteristics of masonry material. The basic cell is modelled with distinctive consideration of non-linear material properties of mortar and brick. Various displacement boundaries are applied on the basic cell surfaces in the numerical simulation. The detailed material properties of mortar and brick are modelled in a finite element program in the numerical analysis. The stress-strain relations of masonry material under various conditions are obtained from the simulation. The homogenized elastic properties and failure characteristics of masonry material are derived from the simulation results. The homogenized 3D model is then utilized to analyse the response of a masonry panel to airblast loads. The same panel is also analysed with distinctive material modelling. The efficiency and accuracy of the homogenized model are demonstrated. The homogenized material properties and failure model can be used to model large-scale masonry structure response.

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Modeling of simultaneous ground shock and airblast pressure on nearby structures from surface explosions

Cited by 192 publications

References 14 publications

Studying an engineering model on an air blast wave

Studying an engineering model on an air blast wave

Analytical calculation of blast-induced strains to buried pipelines

Derivation of 3D masonry properties using numerical homogenization technique

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