Numerical simulation of blast wave interaction with structure columns

Shi, Yanchao; Hong, Hyun-Ki; Li, Zhongxian

doi:10.1007/s00193-007-0099-5

Cited by 98 publications

(45 citation statements)

References 15 publications

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“…The rarefaction 'relief' wave sweeps in from the edges of the target and acts to reduce the pressure acting at any point that the wave propagates over. This process is known as 'clearing' and it is known to significantly reduce the impulse acting on the target face, as has been shown both experimentally (Rickman & Murrell (2007), Rose et al (2006), Smith et al (1999), Tyas et al (2011)) and numerically (Rose et al (2006), Rose & Smith (2000), Shi et al (2007)). …”

Section: Introductionmentioning

confidence: 91%

Clearing effects on plates subjected to blast loads

Rigby

Tyas

Bennett

et al. 2013

Proceedings of the Institution of Civil Engineers - Engineering

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Empirical prediction methods are often used in the early stages of design to quantify the blast load acting on a structure. Whilst these methods are reasonably accurate for geometrically simple scenarios, they may not be accurate for situations where the target does not form a reflecting surface of effectively infinite lateral extent. In this case, the blast wave will diffract around the target edge, leading to the propagation of a relief wave inwards from the edge of the structure, reducing the late-time development of pressure in a process known as 'clearing'. This article presents results from a study undertaken to determine the influence of clearing on the response of simple targets. Experiments were conducted in which deflection-time histories were recorded for target plates subjected to cleared and non-cleared blast loads. These were compared to predictions from explicit dynamic Finite Element and Single-Degree-of-Freedom models, in which the blast loading was derived by applying a simple correction to the empirical blast prediction method. The results presented show both that neglecting clearing may result in highly conservative predictions of target response, and that analyses using loading derived from simple corrections to the ConWep predictions match the experimentally observed results very closely. Keywords AbstractEmpirical prediction methods are often used in the early stages of design to quantify the blast load acting on a structure. Whilst these methods are reasonably accurate for geometrically simple scenarios, they may not be accurate for situations where the target does not form a reflecting surface of effectively infinite lateral extent. In this case, the blast wave will diffract around the target edge, leading to the propagation of a relief wave inwards from the edge of the structure, reducing the late-time development of pressure in a process known as 'clearing'. This article presents results from a study undertaken to determine the influence of clearing on the response of simple targets. Experiments were conducted in which deflection-time histories were recorded for target plates subjected to cleared and non-cleared blast loads. These were compared to predictions from explicit dynamic Finite Element and Single-Degree-of-Freedom models, in which the blast loading was derived by applying a simple correction to the empirical blast prediction method. The results presented show both that neglecting clearing may result in highly conservative predictions of target response, and that analyses using loading derived from simple corrections to the ConWep predictions match the experimentally observed results very closely.3

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Section: Introductionmentioning

confidence: 91%

Clearing effects on plates subjected to blast loads

Rigby

Tyas

Bennett

et al. 2013

Proceedings of the Institution of Civil Engineers - Engineering

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“…The negative pulse is neglected. In this study, the blast loads are estimated according to formulae given in Shi, et al [14]. A group of blast loads with different peak pressure and impulse combinations are uniformly applied to the column front face.…”

Section: Blast Loadingmentioning

confidence: 99%

Numerical Investigation on the Non-Linear Response of Reinforced Concrete (RC) Columns Subjected to Extreme Dynamic Loads

Abedini

Mutalib

Raman

et al. 2017

Journal of Asian Scientific Research

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Article HistoryReinforced concrete (RC) is the most widely used construction system in construction. The non-linear response of concrete when subjected to extreme dynamic loads such as blast is an important consideration for analysis and design of structures members. In this paper numerical modeling of RC column under blast load is presented using LS DYNA explicit dynamics software package. The accuracy of the model to simulate RC column responses to blast loads is verified by comparing the numerical simulation results with the test results available in the literature. A parametric study was chosen to investigate the effects of charge weight and stand-off distance on the dynamic behavior of RC column. The results of the numerical study show that the charge weight and standoff distance has a significant effect on the behavior of RC columns under explosion loading. Contribution/ Originality:The main contribution of this research is a better understanding of the dynamic response of RC columns under various blast magnitudes. Blast loading and its effects on a structure are influenced by a number of factors including charge weight, location of the blast, geometrical configuration and orientation of the structure.

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“…Once the critical blast scenario is chosen, the blast loads acting on the structural components could be derived according to the analytical formulae and design charts [7,6,18] . Then both the initial condition and initial damage of each structural member could be derived using the method described as follows.…”

Section: Derivation Of Non-zero Initial Condition and Initial Damage mentioning

confidence: 99%

Methods for progressive collapse analysis of building structures under blast and impact loads

Shi

2008

Trans. Tianjin Univ.

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Abstract：Progressive collapse of building structures under blast and impact loads has attracted great attention all over the world. Progressive collapse analysis is essential for an economic and safe design of building structures against progressive collapse to blast and impact loads. Because of the catastrophic nature of progressive collapse and the potentially high cost of constructing or retrofitting buildings to resist it, it is imperative that the progressive collapse analysis methods be reliable. For engineers, their methodology to carry out progressive collapse evaluation need not only be accurate and concise, but also be easily used and works fast. Thus, many researchers have been spending lots of effort in developing reliable, efficient and straightforward progressive collapse analysis methods recently. In the present paper, current progressive collapse analysis methods available in the literature are reviewed. Their suitability, applicability and reliability are discussed. Our recent proposed new method for progressive collapse analysis of reinforced concrete frames under blast loads is also introduced.Progressive collapse is defined as "the spread of an initial local failure from element to element resulting in the collapse of an entire structure or a disproportionately large part of it" [1] . It refers to the failure of one or a group of key structural load-carrying members that give rise to a more widespread failure of the surrounding members and partial or complete structural collapse. Progressive collapse of building structures might be induced by a series of accidental and intentional events, such as false construction order, local failure due to accidental overload, damage of critical component by explosion and earthquake. This paper only focuses on progressive collapse analysis of building structures induced by abnormal loads, such as blast and impact.With the recent progressive collapse of Alfred P. Murrah Federal Building and World Trade Center (WTC), researches are more focused than ever on constructing buildings safer from progressive collapse induced by blast and impact loads. Progressive collapse analysis is essential for an economic and safe design of building structures against progressive collapse to blast and impact loads. Because of the catastrophic nature of progressive collapse and the potentially high cost of constructing or retrofitting buildings to resist it, it is imperative that the progressive collapse analysis methods be reliable [2] . For engineers, their methodology to carry out progressive collapse evaluation need not only to be accurate and concise, but also be easily used and works fast. Thus, many researchers have been spending lots of effort in developing reliable, efficient and straightforward progressive collapse analysis methods recently.The current available methods in analyzing structural progressive collapse could be classified into two major categories, namely the direct simulation method, in which the blast loading effects on structural damage and building coll...

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Numerical simulation of blast wave interaction with structure columns

Cited by 98 publications

References 15 publications

Clearing effects on plates subjected to blast loads

Clearing effects on plates subjected to blast loads

Numerical Investigation on the Non-Linear Response of Reinforced Concrete (RC) Columns Subjected to Extreme Dynamic Loads

Methods for progressive collapse analysis of building structures under blast and impact loads

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