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Masoud ABEDINI Azrul A. MUTALIB Chunwei ZHANG Javad MEHRMASHHADI Sudharshan Naidu RAMAN Roozbeh ALIPOUR Tohid MOMENI Mohamed H. MUSSA 《Frontiers of Structural and Civil Engineering》2020,14(2):532
Reinforced concretes (RC) have been widely used in constructions. In construction, one of the critical elements carrying a high percentage of the weight is columns which were not used to design to absorb large dynamic load like surface bursts. This study focuses on investigating blast load parameters to design of RC columns to withstand blast detonation. The numerical model is based on finite element analysis using LS-DYNA. Numerical results are validated against blast field tests available in the literature. Couples of simulations are performed with changing blast parameters to study effects of various scaled distances on the nonlinear behavior of RC columns. According to simulation results, the scaled distance has a substantial influence on the blast response of RC columns. With lower scaled distance, higher peak pressure and larger pressure impulse are applied on the RC column. Eventually, keeping the scaled distance unchanged, increasing the charge weight or shorter standoff distance cause more damage to the RC column. Intensive studies are carried out to investigate the effects of scaled distance and charge weight on the damage degree and residual axial load carrying capacity of RC columns with various column width, longitudinal reinforcement ratio and concrete strength. Results of this research will be used to assessment the effect of an explosion on the dynamic behavior of RC columns. 相似文献
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Watermarking on Colored Images 总被引:3,自引:2,他引:1
MUSSA Bshara NIU Xin xin LUO Shou shan YANG Yi xian Foundation item: Project Supported by National Foundation of Natural Sciences 《中国邮电高校学报(英文版)》2001,8(1)
1 IntroductionInthelastfew years,manyschemesofwater markinghavebeenintroduced ,andtheresearchersalwaystrytheirbesttofindanalgorithmwhichal lowsthemtoembedarobustwatermarkwithoutaf fectingthequalityoftheimage.Uptillnow ,therehasbeennoschemegoodenoughtobead… 相似文献
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