爆破地震效应

Blasting Vibration Effect

爆破地震震动达到足够强度时,就会引起各种破坏现象。寻找爆破地震烈度工程标准参数,研究爆破地震动强度,分析爆破地震力对结构的破坏作用,是当前工程结构抗爆破地震效应研究的重点问题。综述了爆破地震烈度的局限性,说明了爆破地震加速度和速度间的相关性,重点通过分析单质点系的爆破地震反应,计算了结构中的内力,进而判断结构的破坏情况,得出建筑结构的震害是由爆破地震运动的加速度或速度最大值决定,而岩土工程的震害主要由地面运动最大速度决定的结论。

The selection of the blasting-earthquake intensity project standard parameters, the ground vibrations induced by blasting, and analysis of the shake force against structure are the predominate questions of project structure. The blasting limitation of blasting vibration intensity is introduced, the dependence of blasting vibration acceleration and speed is analyzed. Through analyzing the single particle system reacting to blasting vibration, the internal force of structure is calculated especially. The conclusions are drawn that the vibration disaster of structure is determined by blasting vibration acceleration maximum or blasting vibration velocity maximum, while vibration disaster of rock soil project mainly by great speed of ground movement.