普通砌体房屋结构震动响应特性测试分析

Test Analysis of Ordinary Masonry Structural Vibration Response Feature

对于特定结构,震动的幅值、主频和持时的不同组合决定着爆破震动的安全性。文章结合Excel和小波分析等工具对实测数据进行了分析处理,获得了爆破震动荷载作用下不同楼层结构的响应特性:震动信号的峰值速度(PPV)和能量主要集中在低频波段;随楼层的增加,信号的主频减小,PPV和低频部分的能量比例呈放大趋势,同时震动持时最长的方向由垂直方向向水平方向转变,整个结构的震动响应特性呈波浪式变化;另外,结构在水平径向的PPV较其它方向的突出,且主频比较接近结构自振频率,易发生扭曲变形。

For the specific structure,vibration amplitude,frequency and who determines when different combinations of blasting vibration safety.In combination with tools such as Excel and wavelet analysis of measured data for the analysis and processing,access to the blasting vibration loads,the response characteristics of the different floors of the structure： vibration signal peak velocity（PPV） and energy is mainly concentrated in the low frequency band;with the increase in floor,the signal frequency decreases,PPV,and the proportion of low-frequency part of the energy trend was amplified,while holding the longest direction of the vibration from the vertical to the horizontal shift,the entire structure of the vibration response characteristics of wavy change;In addition,the structure horizontal radial direction than the other prominent PPV,and the frequency closer to the natural frequency of the structure,prone to distortion.