Current approaches rely almost exclusively on empirical data, few if any truly predictive models exist. Those who downloaded this book also downloaded the following books. It was found that the wavefence interaction and interference of waves significantly reduced the wave energy when the blast wave passed through the fence blast wall. The numerical results are compared with the experiment results, and a good agreement is obtained. The use of a spray application elastomer coating as an effective retrofit strategy for blast and impact mitigation has gained increasing attention in recent years. Blast mitigation experimental and numerical studies d.
Static load testing of rc members has also demonstrated the applicability of the system for general. Experimental, numerical, and analytical slosh dynamics by. On the conditions required for explosion mitigation by water sprays. Experimental investigation of a novel blast wave mitigation device 545 p i s t o n cylinder blast w ave base protected structure fig. Explosions generate two types of threats for a protective structure. The physical properties of a range of mitigant materials have been studied at a more fundamental level, both experimentally and numerically. The work presented in this paper concerns a project on the optimization of protections subjected to explosions ieds threat. Polyurea coated and plane reinforced concrete panel. An explosion yielding a blast wave can cause catastrophic damage to a building and its personnel. The royal british legion centre for blast injury studies is now progressing to a new phase of research. Extensive studies have investigated the blast mitigation effects of a water barrier and proved its feasibility. Xinbang tian, qingming li, zhongyuan lu, and zhihua wang. Various experimental studies and analytical and numerical investigations have been conducted within the framework of this investigation.
Dstl has recently pursued an experimental programme investigating the mitigation of effects from detonating explosives in support of general requirements to attenuate blast and fragmentation. The objectives of this study were to examine the effectiveness of polyurea on blast mitigation and to develop a numerical means to evaluate the structural performance of polyurea coated steel structures under extreme events. Fence type blast wall consisting of structural columns was recently proposed and its effectiveness in mitigating blast loads was investigated through numerical simulations. Water and cryogenic liquid nitrogen are used in various groundbased tests with a spherical tank to characterize damping, slosh mode frequencies, and slosh forces. Polyurea coated and plane reinforced concrete panel behavior under blast loading. Lastly, the validated numerical model can be used to examine the influence of other major factors on the blast mitigation effect of barriers by conducting parametric studies. Examples of previous uses of water sprays for combustion mitigation are then. The experimental blast effects on both reference and strengthened panels, despite the lack of high speed measurement equipment pressure, strains and displacements sensors, compare well with the numerical estimates in terms of residual and maximum displacements, showing that, once calibrated, the aem numerical models can be successfully used. Besides, confirming the existence of the water mitigation phenomenon, leading in some cases confined structures to reduction in gas pressures to up to 80%, this study has indeed overall increased the. An experimental and numerical study of blast induced shock wave mitigation in sandwich structures article in applied acoustics 741. Pdf an experimental study on the mitigation effects of. Experimental and numerical studies on the dynamic response of.
The development of a fundamental understanding of the mechanisms governing the attenuation of explosives effects by a surrounding mitigant material or system would benefit many civilian and military applications. Experimental and numerical studies of the antipenetration performance of sandwich panels with. Pdf on aug 1, 2019, xiangshao kong and others published an experimental study on the mitigation effects of fine water mist on confinedblast loading and dynamic response of steel plates find. He is the editorcoeditor of 32 books including the recently published dynamic failure of materials and structures, dynamic failure of composite and sandwich structures, blast mitigation. The calculating results also demonstrate that some experimental value is unreasonable. Experimental and numerical studies of the antipenetration performance of sandwich panels with aluminum foam cores, acta mechanica solida sinica, 286, 735746. Experimental and numerical analysis for nonload bearing sandwich wall panels for blast mitigation. The authors present the most uptodate understanding from laboratory studies and computational analysis for researchers working in the field of blast loadings and their effect on material and structural failure. Despite some encouraging studies in the literature, there remains a great deal yet to be understood, particularly regarding the coatings impact mitigating capabilities when applied to structural elements. Experimental and numerical investigation on the impact.
Field testing of fence type blast wall for blast load. An experimental and numerical study of blast induced shock wave mitigation in sandwich structures. Experimental and numerical study on dynamic response of v. Pdf experimental and numerical studies on the structural. Finite element simulation of response of buried shelters to blast loadings, finite elements in analysis and design. Analytical and experimental studies to predict response of.
Contrary to conventional blast mitigation solutions, a facade system consisting of cones can be designed to resist blast more reasonably and. Experimental and numerical work was performed to investigate the performance of polyurea coated steel plates under high. Experimental and numerical study of a combined blast and. Experimental and numerical studies on the structural response of normal. This improved blast mitigation property is extremely important in protecting many commercial, naval.
Towards this end, a comprehensive analytical and numerical study of basic problems in the interaction of blast waves with structures is conducted. Numerical study of blast mitigation effect of innovative barriers using. An experimental and numerical study of blast induced shock. This book covers both experimental and numerical aspects of material and structural response to dynamic blast loads and its mitigation. Pdf an experimental and numerical study of blast induced. Blast mitigation in a sandwich composite using graded core and polyurea interlayer n. National indian institute of technology, surat, india. Experimental and numerical studies covers both experimental and numerical aspects of material and structural response to dynamic blast loads and its mitigation. Experimental validation of metaconcrete blast mitigation properties. Experimental study of blast mitigation by foamed concrete. Effects of thicknesses and locations of the polyurea on the blast mitigation are also studied. The explosive was selected due to its popularity in blast research. Experimental and numerical studies arun shukla, yapa d.
Experimental and numerical investigation of a hollow. Blast mitigation experimental and numerical studies. Understanding the failure mechanisms in these materials will lead to an optimal design of light weight structures capable of withstanding blast loadings. Blast mitigation in a sandwich composite using graded core. Experimental and numerical studies english 20 isbn. Loads generated in explosions that result from terrorist attacks and industrial accidents create devastating hazards for buildings and their occupants. It will focus more heavily on the translation of basic research and the use of its developed technologies, not only for mitigation and protection, but also for improved longterm outcomes through engineered rehabilitation and treatment solutions. Crowl cos wiley springer springer wiley springer rahmati. Dstl has recently pursued an experimental programme investigating the. Because of the variety of dynamic loads applied to the. Blast mitigation strategies in marine composite and.
Experimental and numerical studies on the reinforced concrete frames subjected to blast loads scientific. Blast mitigation experimental and numerical studies arun shukla. An analytical and experimental study has been conducted to investigate the blast resistance and mitigation behaviors of structural materials. However, slosh data for cryogenic liquids is lacking. Request pdf on dec 1, 2017, cheng zheng and others published experimental and. Experimentation and numerical modeling on the response of.
Cfd blast simulations using puma2 are described and validated. Random parameters such as the luggage filling ratio and the position of the explosive inside the container have a relevant influence on the effect of the explosion and its mitigation see figure 1. Polyurea coating exhibited ductile behavior and was effective at containing. The objective of this dissertation is to develop design guidelines and methodologies for protectivehardening strategies used to mitigate blast hazards in reinforced concrete and concrete masonry walls. Analysis of blast mitigation strategies exploiting fluid. Numerical studies are conducted to evaluate the blast mitigation effect of barriers. Experimental and numerical studies covers both experimental and numerical aspects of material and structural response to dynamic blast. E neewn blast waves blast resistant design of buildings. Numerical models were developed and validated against the experimental. Mitigation of blast effects on protective structures by aluminum foam panels changsu shim 1, nuri yun 1, robin yu 2 and doyeon byun 2 1 department of civil and environmental engineering, chungang university, seooul 156769, korea.
Experimental evidence from a wide range of sources shows that the expanding cloud of explosively disseminated material comprises particles or fragments which have different dimensions from those associated with the original material. Experimental and numerical analysis for nonload bearing. Batra and hassan 2008 conducted a research on the blast effect to unidirectional fiber composite structure using finite element method. Cbuwl handbook of explosion prevention and protection and explosion structural analysis and design springer c. Son1 1school of mechanical engineering, purdue university, west lafayette in 47905 abstract. Explanations of selected strainrate dependent material models for the steel and polyurea are provided. The system behavior has been validated with both experimental testing and through numerical studies. Experimental and numerical studies, and durability of composites in a marine environment. Pdf blast mitigation analysis of semiburied structure semantic. Experimental and numerical study on dynamic response of vshaped hull. Dynamic fragmentation of blast mitigants springerlink. Experimental and numerical studies of novel protective. Pdf to assess the blast performance of concrete structures, a shock tube has.
Effectiveness of advanced coating systems for mitigating. The analysis is of interest in the conception of blast mitigation strategies and in the design and optimization of protection systems with improved performance against blast. Mitigation of blast effects on protective structures by. Powders and liquids have often been used to surround explosives to act as blast mitigants, and this is the main driver for our research. Numerical study of blast mitigation effect of innovative. Experimental and numerical studies of novel protective panels against blast and impact loadings by wensu chen beng, meng this thesis is presented for the degree of doctor of philosophy of the university of western australia structural engineering school. They can be used to evaluate the blast mitigation effect in a more common manner than that in the experimental study i. Research development on protection of structures against. An experimental study on the mitigation effects of fine water mist on.
Biomechanics and injury mitigation systems program. Experimental and numerical studies on the reinforced. Experimental and numerical studies deepam patel research student, department of applied mechanics, s. Many experimental and numerical studies of water slosh have been conducted.
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