基于反应谱值分析的爆破震动破坏评估研究

Study on blasting vibration damage based o n response spectrum

采用反应谱方法研究了爆破震动信号的振动速度和频率特征,提出了采用反应谱曲线积分值来评估爆破震动破坏效应。通过对289组爆破地震波数据的统计表明,在反应谱曲线的积分值小于5时,爆破地震动不会对所研究的普通民房结构物产生震动破坏效应。

The characteristics of blasting seismic waves were analyzed with the method of response spectrum (RS). As the response spectrum curve manifests the relationship between the maximal responses and the periods of a series of different dynamical structures under blasting vibration shocks, the integral of the response spectrum(RSI) synthesizes the characteristics of velocity, frequency and the blasting seismic wave's duration, the above relation was used to study the relation of RSI and blasting vibration velocity, frequency. The results indicate that there are a good relation among them, and it confirms that RSI can be used to estimate damage probability caused by blasting vibrations. According to the analysis of 289 blasting seismic data, the method used is reasonable. As a result, it is pointed out that when the value of RSI above is 5, potential damage to common residential houses is dangerous the results is consistent with the generic standard of safe blasting vibration.