[1]高文乐①,赵德龙①,李元振①,等.延期时差对多截面承重立柱框架结构拆除爆破效果的影响[J].爆破器材,2021,50(02):50-54.[doi:10.3969/j.issn.1001-8352.2021.02.010]
　GAO Wenle,ZHAO Delong,LI Yuanzhen,et al.Influence of Delayed Time Difference on Demolition Blasting Effect of Multi-Section Load-Bearing Column Frame Structure[J].EXPLOSIVE MATERIALS,2021,50(02):50-54.[doi:10.3969/j.issn.1001-8352.2021.02.010]
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延期时差对多截面承重立柱框架结构拆除爆破效果的影响()
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《爆破器材》[ISSN:1001-8352/CN:32-1163/TJ]

卷:
50
期数:
2021年02
页码:
50-54
栏目:
爆破技术
出版日期:
2021-04-09

文章信息/Info

Title:
Influence of Delayed Time Difference on Demolition Blasting Effect of Multi-Section Load-Bearing Column Frame Structure
文章编号:
5507
作者:
高文乐①; 赵德龙①; 李元振①; 张泽华②; 李坤鹏①
①山东科技大学土木工程与建筑学院（山东青岛，266590）
②中国石油大学（华东）储运与建筑工程学院（山东青岛，266580）
Author(s):
GAO Wenle①; ZHAO Delong①; LI Yuanzhen①; ZHANG Zehua②; LI Kunpeng①
① College of Civil Engineering and Architecture, Shandong University of Science and Technology (Shandong Qingdao, 266590)
② College of Pipeline and Civil Engineering, China University of Petroleum (East China) (Shandong Qingdao, 266580)
关键词:
拆除爆破; 多截面承重立柱; 框架结构; 延期时差
Keywords:
demolition blasting;  multi-section load-bearing column;  frame structure;  delay time difference
分类号:
TU746.5
DOI:
10.3969/j.issn.1001-8352.2021.02.010
文献标志码:
A
摘要:
为了探究多截面承重立柱框架结构在三角形爆破切口下的最优延期时差，利用ANSYS/LS-DYNA软件，采用有限元方法建立分离式共节点模型，对8种不同延期时差下结构的倒塌效果进行数值模拟，分析延期时差对多截面承重立柱框架结构拆除爆破效果的影响规律。通过分析比较得出：爆堆高度和后坐距离随着延期时差的增大先减小后增加，最后趋于稳定。其中，当延期时差为500 ms时，爆堆高度最小；当延期时差为400 ms时，后坐距离最小。且实际爆破现场也和数值模拟的结果较为相符，说明数值模拟可以有效地指导爆破施工。
Abstract:
In order to explore the optimal delay time difference of multi-section load-bearing column frame structure with triangular blasting cut, the finite element method was used to establish the separated common node model by using ANSYS/LS-DYNA Software. The collapse effect of the structure under eight different delay time differences was numerically simulated, and the influence law of delay time difference on demolition blasting effect of multi-section load-bearing column frame structure was analyzed. Through the analysis and comparison, it is concluded that height and recoil distance of the blasting pile first decrease and then increase with the increase of delay time difference, and finally tend to be stable. When the delay time difference is 500 ms, the blasting height is the minimum. When the delay time difference is 400 ms, the recoil distance is the minimum. And the actual blasting is also consistent with the numerical simulation results, which shows that the numerical simulation can effectively guide the blasting construction.

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备注/Memo

备注/Memo:
收稿日期：2020-08-01
基金项目：国家自然科学基金(51874189)
第一作者：高文乐（1966－ ），男，硕士，教授，主要从事岩土力学和爆破安全技术的教学和科研工作。E-mail: wenlegao@163.com
通信作者：赵德龙（1995－ ），男，硕士研究生，主要从事岩土力学和爆破安全技术的研究。E-mail:1102707042@qq.com
更新日期/Last Update: 2021-04-09