工程场地隔振沟减震效应

英文篇名：Vibration-isolating Effect of Vibration-isolating Slot in Project Site
中文刊名：爆破
英文刊名：Blasting
作者：郑水明 ; 姚运生 ; 曾心传
英文作者：ZHENG Shui-ming1 ; 2 ; YAO Yun-sheng1 ; ZENG Xin-chuan1 ; 2(1.Institute of Seismology ; CEA ; Wuhan 430071 ; China ; 2.Wuhan Institute of Earthquake Engineering ; Wuhan 430071 ; China)
中文关键词：隔振沟 ; 减震效应 ; 振动速度波 ; 频谱特性 ; 时程
英文关键词：vibration-isolating slot ; vibration-isolating effect ; vibration velocity wave ; frequency spectrum characteristics ; time history
出版日期：2008-09-15
机构：中国地震局地震研究所;
年：2008
期：03
出版单位：爆破

摘要

研究了一条长50m、宽2m、深7m隔振沟的减震效应。振动时,利用测振仪对隔振沟两侧振动速度时程进行了纪录,对两侧的振动速度峰值及其振动速度时程的频谱特性进行了分析,结果表明:隔振沟对水平径向振动的速度峰值幅值隔振效果显著,达到了80%,而对垂直向振动的速度峰值幅值隔振效果不到30%;同时隔振沟还改变了振动速度波的频谱特性,隔振沟不仅改变了水平径向振动的频谱形状,而且使其最大峰值频率有一定程度的降低,而对垂直向振动的频谱形状及其最大峰值频率则均无明显的改变。
The vibration-isolating effect of a vibration-isolating slot which is 50 m in length,2 m in width,7 m in depth are studied.Based on the recorders of time histories on ground surface velocities of two sides of vibration-isolating slot,peak particle velcities and the frequency spectrum characteristics of vibration velocity wave are analyzed.The results show that the vibration-isolating effect on horizontal velocity amplitude is obvious,with about 80%,but the damping effect on vertical velocity amplitude is less than 30%.The vibration-isolating slot also changes the frequency spectrum characteristics of velocity wave.For horizontal velocity wave,the shape of frequency spectrum is changed,and the peak frequency amplitude is decreased,while there is no obvious changes in these aspects for vertical wave.

引文

[1]张雪亮,黄晓棠.爆破地震效应[M].北京:地震出版社,1981.
    [2]郭学彬.爆破地震作用的沟槽效应[J].爆破器材,1999,28(3):4-7.
    [3]娄建武.爆炸波传播的沟槽效应及分析[J].矿冶工程,2004,24(1):11-15.
    [4]刘军.定向爆破复杂环境下砖混水塔[J].爆破,2006,23(1):73-75.
    [5]梁开水,陈天珠,易长平.减震沟减震效果的数值模拟研究[J].爆破,2006,23(3):18-21.
    [6]邹奕芳.预裂缝和减震槽减震效果的爆破试验研究[J].爆破,2005,22(2):96-99.