爆破地震波引起结构响应的频率因素分析

Analysis on Frequency Factor in Structure Response Induced by Blasting Seismic Wave

不同的频率成分对结构的影响有着显著的差别,与结构自振频率接近的频率对结构破坏起的作用大,相反则小。对地震波的主频变化规律进行了探讨,简化了计算模型,并根据结构响应对不同频率成分的影响进行验证,对爆破地震波中的频率因素进行了分析。最后提出可以采用多主频进行计算以减小误差。

Different frequencies can make notable different response to structures. The more approximate frequency is, the damage action is much larger, vice, it will be smaller. In this paper, frequency variation law of blasting seismic wave is discussed, and the calculation model is simplified, also through the verification of structure response under the action of different frequencies, the frequency factor in blasting seismic wave is analyzed. At last, multi-frequency is proposed to reduce errors.