【摘要】 地震勘探已深入到乡镇、城市等人口密集的复杂地表区域,炸药震源对房屋建筑安全影响研究直接关系到激发参数的优化。在大量震源激发与场地振动试验数据的基础上,采用统计分析和回归方法,重点分析了不同炸药震源激发参数引起的场地质点振动的位移、速度、加速度振幅,主频,持续时间以及振动方向等特征参数,总结了场地质点的振动响应、衰减关系、房屋建筑振动特性及其抗震性能。结果表明,激发井深的变化对场地质点峰值衰减快慢的影响比药量变化的影响要大;建筑物对振动速度、位移有明显的放大效应,在距离激发点130和230m处的加速度、速度、位移放大效应尤为突出。更多还原

【Abstract】 The seismic exploration has been extended to the towns,cities and other densely populated areas.The impact research of the building caused by explosion is directly related to the excitation parameters optimization.On the basis of experimental data,this paper focused on the analysis of different particle vibration displacement,velocity.acceleration amplitude.frequency.duration and direction of vibration caused by different seismic excitation parameters.Moreover,the rule about the vibration response,attenua-tion of particle and the response of housing are generalized and summarized.The research indicates that the impact of hole depth should be higher than the variation of explosive amount.The vibration velocity and displacement were amplified obviously by the building.especially at a distance of 130m,230m away from shotpoint.更多还原