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Strength and Toughness of Steel Fibre Reinforced Reactive Powder Concrete Under blast loading

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Transactions of Tianjin University 2006年第B09期12卷 70-74页

作者： KUZNETSOV Valerian A REBENTROST Mark WASCHL John Weapons Systems Division DSTOEdinburgh SA 5111Australia VSL Australia Noble Park VIC 3174Australia

The blast resistance of structures used in buildings needs to be investigated due to the increased threat of a terrorist attack. The damage done by Composition B or Powergel to steel fibre reinforced reactive powder concrete （SFRPC） panels and ordinary reinforced concrete （RC） panels of equivalent static flexural strength is compared. A 0. 5 kg charge was detonated at a distance of 0. 1 m from the 1. 3 m × 1. 0 m × 0. 1 m （thick） panels, which were simply supported and spaning 1.3 m. Dynamic displacement measurements, high-speed video recording and visual examination of the panels for spall and breach were undertaken. The SFRPC panels withstood the bare charge blast better than the reinforced ordinary concrete panels. Neither type of panel was breached using a O. 5 kg charge, The RC panel exhibited more spalling when Composition B was used. Under successive Composition B loading conditions, the RC panel was breached. In comparison the SFRPC panel was not breached. Exposure to fragmenting charge loading conditions confirmed these performance differences between the SFRPC panel and the reinforced ordinary concrete panel.

关键词： steel fibre reinforced reactive powder concrete blast loading spalling explosive blast loading

Numerical Analysis of Dynamic Behavior of RC Slabs Under blast loading

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Transactions of Tianjin University 2009年第1期15卷 61-64页

作者：都浩李忠献 School of Civil Engineering Tianjin University

In order to reduce economic and life losses due to terrorism or accidental explosion threats, reinforced concrete （RC） slabs of buildings need to he designed or retrofitted to resist blast loading. In this paper the dynamic behavior of RC slabs under blast loading and its influencing factors are studied. The numerical model of an RC slab subjected to blast loading is established using the explicit dynamic analysis software. Both the strain rate effect and the damage accumulation are taken into account in the material model. The dynamic responses of the RC slab subjected to blast loading are analyzed, and the influence of concrete strength, thickness and reinforcement ratio on the behavior of the RC slab under blast loading is numerically investigated. Based on the numerical results, some principles for blast-resistant design and retrofitting are proposed to improve the behavior of the RC slab subjected to blast loading.

关键词： blast loading reinforced concrete slab dynamic behavior numerical analysis

Numerical Modeling of Response and Damage of Masonry Walls to blast loading

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Transactions of Tianjin University 2006年第B09期12卷 132-137页

作者： DEEKS Andrew School of Civil and Resource Engineering The University of Western AustraliaAustralia

To model the damage process of masonry walls under blast loading, a dynamic continuum damage material model is constructed for brick and mortar separately. The degradation of both the stiffness and strength are governed by a damage variable. By using the proposed material model, damage and fragmentation of a typical masonry wall under blast loading at different scaled distances is calculated. The hazard level of the masonry wall to blast loading is evaluated by analyzing the numerical results.

关键词： masonry blast loading fragmentation hazard level damage numerical modeling

Analysis on Dynamic Response of Hard-Soft-Hard Sandwich Panel Under blast loading

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Transactions of Tianjin University 2006年第B09期12卷 233-237页

作者： DONG Yongxiang FENG Shunshan JIN Jun State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing 100081 China The Academy of Armored Forces Engineering of PLA Beijing 100072 China

Surface contact explosion experiments have been performed for the study of dynamic response of the hard-soft-hard sandwich panel under blast loading. Experimental results have shown that there are four damage modes, including explosion cratering, scabbing of the backside, radial cracking induced failure and circumferential cracking induced failure. It also illustrates that the foam material sandwiched in the multi-layered media has an important effect on damage patterns. The phenomena encountered have been analyzed by the calculation with ALE method. Meanwhile, the optimal analysis of foam material thickness and position in the sandwich panel were performed in terms of experimental and numerical analysis. The proper thickness proportion of the soft layer is about 2.0% to the thickness of sandwich panel and the thickness of the upper hard layer and lower hard layer is in the ratio of ？ to 3 under the condition in this paper when the total thickness of soft layer remains constant.

关键词： dynamic response sandwich panel blast loading foam material

Rate-Sensitive Numerical Analysis of Dynamic Responses of Arched blast Doors Subjected to blast loading

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Transactions of Tianjin University 2008年第5期14卷 348-352页

作者：陈力方秦章毅张亚栋 Engineering Institute of Corps of Engineers PLA University of Science and Technology

Current practice in analysis and design of blast doors subjected to blast loading considers only simple boundary conditions and material properties. The boundary conditions and material properties, in fact, have considerable influence on the response of blast doors subjected to blast loading. In this paper, the dynamic responses of a reinforced concrete arched blast door under blast loading were analyzed by the finite element program ABAQUS, combined with a previously developed elasto-viscoplastic rate-sensitive material model. And the effect of the surrounding rock mass and contact effect of the doorframe were also taken into account in the simulation. It is demonstrated that the strain-rate effect has considerable influence on the response of reinforced concrete blast door subjected to blast loading and must be taken into account in the analysis.

关键词： arched blast door strain rate blast loading dynamic response

Capacity of surface warship's protective bulkhead subjected to blast loading

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Journal of Marine Science and Application 2009年第1期8卷 13-17页

作者：彭兴宁聂武严波哈尔滨工程大学船舶工程学院黑龙江哈尔滨150001 中国船舶科学研究中心江苏无锡214082

The protective bulkhead of the large surface warship need to be designed working in the membrane mode. In this paper, a formula is derived for calculating the plastic deformation of the protective bulkhead subjected to blast loading by the energy method, and the ultimate capability of the protective bulkhead can be calculated. The design demand of the protective bulkhead is discussed. The calculation is compared with external experiments, which indicates that the formula is of great application value.

关键词： protective bulkhead blast loading energy method

Numerical Simulation of the Flat Ribbon Wound Explosion Containment Vessels Subjected to Internal blast loading

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Transactions of Tianjin University 2006年第B9期12卷 223-227页

作者： SONG Yanze LI Zhiqiang ZHAO Longmao ZHENG Jinyang Institute of Applied Mechanics Taiyuan University of Technology Taiyuan 030024 China Institute of Chemical Machinery and Equipment Zhejiang University Hangzhou 310037 China

In order to constitute engineering design methods of the flat ribbon wound explosion containment vessels, the dynamic response of such vessels subjected to internal explosion loading is simulated using LS-DYNA3D. Three winding angles, 10°, 15°and 20°, are considered. It is shown that among ribbon vessels investigated, the center displacement of outermost ribbons of the vessel with 10°winding angle is the smallest under the same blast loading. The response of vessels loaded in inner core is local. From the center of the cylindrical shell to the bottom cover, the maximum strain gradually decreases. The ribbons are subjected to tension in the length direction and compression in the width direction. blasting shock energy concentrates on where is close to center section of blasting. For comparison, numerical simulation of a monobloc thick-walled explosion containment vessel is also investigated. It can be found that the biggest deformation of the flat ribbon wound explosion containment vessels is bigger than that of the monobloc thick-walled explosion containment vessel in the center section of blasting under the same TNT. Numerical results are approximately in agreement with experimental ones. It is proved that the ribbon vessels have the valuable properties of ' leak before burst at worst' compared with the monobloc vessels through numerical simulation.

关键词： flat ribbon wound explosion containment vessels blast loading dynamic response numerical simulation

Scaling for Plate Specimens Subjected to Buried blast loading

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Scaling for Plate Specimens Subjected to Buried Blast Loadin...

EFFECTS OF STRUCTURAL DIMENSIONS AND MATERIAL PROPERTIES ON THE blast loading AND DYNAMIC ELASTIC RESPONSE OF CONTAINMENT VESSELS

第十三届全国实验力学学术会议

作者： Michael A.Sutton Xing Zhao Stephen R.McNeill Vikrant Tiwari Xiaomin Deng William L.Fourney Uli Leiste Dept of Mechanical Engineering University of South CarolinaColumbiaSC 29208 Department of Aerospace Engineering University of MarylandMD 20742

Dimensional analysis is performed to develop appropriate parameters to guide the design of a set of scaled experimental *** assess the quality of the scaling predictions for the response of the scaled structures,high-speed stereo-vision system is *** are reported for surface deformations during the blast loading process,including 3D surface displacements,surface strain components and surface velocity and acceleration *** indicates that scaling for both(a) temporal variations and(b) spatial variations results in good agreement throughout the measurement period,demonstrating conclusively that scaling of small specimen measurements can be applied to quantitatively predict the dynamic response of larger plates.

关键词： blast loading dynamic deformation high speed VIC-3D

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EFFECTS OF STRUCTURAL DIMENSIONS AND MATERIAL PROPERTIES ON ...