建（构）筑物拆除爆破塌落触地振动特性研究
发布时间：2019-07-09 08:07
【摘要】：本文以拆除爆破乌海市科技大楼和沈阳市珠江热源厂烟囱时监测到的振动波数据为实验依据,通过对有无减震防护措施下两种结构体拆除爆破塌落过程中质点峰值振速和主振频率衰减规律进行对比分析,计算出有减震措施情况下的振速和频率的变化率,证明减震措施的有效性；回归分析出两次拆除爆破塌落触地振动经验公式的衰减系数,对比两种结构爆破时塌落过程的差别,首次提出了建筑物的下坐现象会严重影响峰值振速衰减系数β值的大小；通过对框架结构大楼下坐触地振动衰减规律的研究,得出与倾倒相同方向上的质点下坐触地振速比切向上同距离的质点振速大；利用量纲分析法的基本原理建立了塌落触地主振频率的相似准数方程,并回归计算现场数据得到了两组类型结构物塌落触地振动主振频率的预测公式；通过对结构在爆破地震效应作用下的动力响应分析结果与同条件下常规地震波的比较分析,验证爆破拆除完成后临近建筑物结构的安全性。
文内图片：
图片说明：图３．１逦ＴＣ－４８５０爆破测振仪测试系统逡逑Ｆｉｇ．邋３．１邋Ｂｌａｓｔｉｎｇ邋ｖｉｂｒａｔｉｏｎ邋ｔｅ＾邋ｓｙ＾ｅｍ邋ｏｆ邋ＴＣ－４８５０逡逑ｒｉｎｒｒｉｉｉｉｉｉ邋邋邋邋邋逦—ｌｉＭｍｉ，…
[Abstract]:Based on the vibration wave data monitored when demolishing the chimney of Wuhai Science and Technology Building and Shenyang Pearl River Heat Source Factory, this paper compares and analyzes the peak particle vibration velocity and the attenuation law of main vibration frequency in the process of demolition blasting collapse with or without shock absorption protection measures, and calculates the change rate of vibration velocity and frequency in the case of shock absorption measures, which proves the effectiveness of the shock absorption measures. The attenuation coefficient of the empirical formula of ground touching vibration in two demolition blasting is analyzed by regression analysis, and compared with the difference of collapse process between the two structures, it is proposed for the first time that the subsidence phenomenon of the building will seriously affect the attenuation coefficient 尾 of the peak vibration velocity, and through the study of the attenuation law of the ground contact vibration under the frame structure building, it is concluded that the vibration velocity of the ground touching under the particle in the same direction as the toppling direction is larger than that of the particle with the same tangential direction. Based on the basic principle of dimensional analysis, the similar criterion equation of the main vibration frequency of collapse touching ground is established, and the prediction formulas of the main vibration frequency of two groups of structures are obtained by regression calculation of the field data. The safety of the adjacent building structure after blasting demolition is verified by comparing the dynamic response analysis results of the structure under the action of blasting seismic effect with the conventional seismic wave under the same conditions.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU746.5;TU311.3
本文编号：2512002
文内图片：
图片说明：图３．１逦ＴＣ－４８５０爆破测振仪测试系统逡逑Ｆｉｇ．邋３．１邋Ｂｌａｓｔｉｎｇ邋ｖｉｂｒａｔｉｏｎ邋ｔｅ＾邋ｓｙ＾ｅｍ邋ｏｆ邋ＴＣ－４８５０逡逑ｒｉｎｒｒｉｉｉｉｉｉ邋邋邋邋邋逦—ｌｉＭｍｉ，…
[Abstract]:Based on the vibration wave data monitored when demolishing the chimney of Wuhai Science and Technology Building and Shenyang Pearl River Heat Source Factory, this paper compares and analyzes the peak particle vibration velocity and the attenuation law of main vibration frequency in the process of demolition blasting collapse with or without shock absorption protection measures, and calculates the change rate of vibration velocity and frequency in the case of shock absorption measures, which proves the effectiveness of the shock absorption measures. The attenuation coefficient of the empirical formula of ground touching vibration in two demolition blasting is analyzed by regression analysis, and compared with the difference of collapse process between the two structures, it is proposed for the first time that the subsidence phenomenon of the building will seriously affect the attenuation coefficient 尾 of the peak vibration velocity, and through the study of the attenuation law of the ground contact vibration under the frame structure building, it is concluded that the vibration velocity of the ground touching under the particle in the same direction as the toppling direction is larger than that of the particle with the same tangential direction. Based on the basic principle of dimensional analysis, the similar criterion equation of the main vibration frequency of collapse touching ground is established, and the prediction formulas of the main vibration frequency of two groups of structures are obtained by regression calculation of the field data. The safety of the adjacent building structure after blasting demolition is verified by comparing the dynamic response analysis results of the structure under the action of blasting seismic effect with the conventional seismic wave under the same conditions.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU746.5;TU311.3
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