【摘要】 分析地下核爆时断裂两侧获取的加速度记录，研究断裂构造对地面运动的影响。发现断裂构造对地震波有显著的隔震作用。当地震波穿过断裂带时其高频能量耗散幅度很大，降震率可达２５％～５０％。１９９１年２月２５日柯坪６．５级地震发生后，距震中１２ｋｍ的县城未遭受到巨大损失，这与区内地质构造的隔震效应有着极为密切的关系。更多还原

【Abstract】 According to acceleration data recorded at both sides of a rupture when underground nuclear explosion was made,the study on effect of rupture structure to ground motion shows that rupture structure has obvious vibration-insulating effect to earthquake waves. When earthquake waves go through the rupture,its high frequency energy dissipate greatly. The vibration - dissipated rate can be 20%～50%. The distance from the epicenter of Keping earthquake(Ms 6. 5,25th, 2, 1991)to Keping County Town is 12 km,but the loss of the town was not great. This Phenomenon has close relation with vibration - insulating effect of regional rupture structure.更多还原