Reinforced concretes(RC)have been widely used in constructions.In construction,one of the eritical elements carrying a high percentage of the weight is columns which were not used 1o design to absorb large dynamic loa...Reinforced concretes(RC)have been widely used in constructions.In construction,one of the eritical elements carrying a high percentage of the weight is columns which were not used 1o 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 amalysis using LS-DYNA.Numerical results are validated against blast feld tests available in the lterature.Couples of simulations are performed with changing blast parameters to.study efects of various scaled distances on the nonlinear bchavior of RC columns.According to simulation results,the scaled distance has a substantial infuence 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 disance unchanged,increasing the charge weight or shorter standoff distance cause more damage to the RC column.Intensive studies are carried out to investigate the efects 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 asessmsent the efet of an explosion on the dynamic behavior of RC columns.展开更多
基金The research was financially supported by the Ministry of Science and Technology of China(No.2017YFC0703603)the Taishan Scholar Priority Discipline Talent Group program funded by the Shandong Province,and the Universiti Kebangsaan Malaysia Grant FRGS-1-2015-TK01-UKM02-4 and AP-2015-011.
文摘Reinforced concretes(RC)have been widely used in constructions.In construction,one of the eritical elements carrying a high percentage of the weight is columns which were not used 1o 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 amalysis using LS-DYNA.Numerical results are validated against blast feld tests available in the lterature.Couples of simulations are performed with changing blast parameters to.study efects of various scaled distances on the nonlinear bchavior of RC columns.According to simulation results,the scaled distance has a substantial infuence 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 disance unchanged,increasing the charge weight or shorter standoff distance cause more damage to the RC column.Intensive studies are carried out to investigate the efects 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 asessmsent the efet of an explosion on the dynamic behavior of RC columns.
