【摘要】 结合理论分析和数值模拟,探讨了降低建筑物爆破拆除塌落振动的措施。采用动力有限元分析程序ANSYS/LS-DYNA,建立了框架结构建筑物爆破拆除塌落振动数值分析模型。对不同拆除方案下的地面质点的振动速度进行了分析比较,结果表明,通过合理设计爆破缺口和起爆时差可以显著降低倒塌过程中塌落振动的影响。更多还原

【Abstract】 Measures to reduce the collapse vibration were discussed with combination of theoretical analysis and numerical simulation.The vibration numerical model of a frame structured building collapse due to explosive demolition was built by dynamic finite-element analysis code ANSYS/LS-DYNA.The vibration velocity of ground particle with different demolition scheme were analyzed and compared.The results show that the effect of collapse vibration in explosive demolition can be reduced significantly by reasonable design of blasting cuts and delay time of initiation.更多还原