爆破切口圆心角及高度对冷却塔倒塌效果的影响研究  

Influence Study of Blast Incision′s Central Angle and Height on Collapse Effect of Cooling Tower

作　　者：高文乐 李云飞 寇玉明 孙鸿 张建伟 柳姬 GAO Wen-le;LI Yun-fei;KOU Yu-ming;SUN Hong;ZHANG Jian-wei;LIU Ji(College of Civil Engineering and Architecture,Shandong University of Science and Technology,Qingdao 266590,China;China Construction eighth Bureau Second construction Co.,Ltd.,Jinan 250014,China;Shanxi Shuozhou Pinglu District Longkuang Daheng Coal Industry Co.,Ltd.,Shuozhou 036899,China)

机构地区：[1]山东科技大学土木工程与建筑学院,青岛266590 [2]中建八局第二建设有限公司,济南250014 [3]山西朔州平鲁区龙矿大恒煤业有限公司,朔州036899

出　　处：《爆破》2025年第1期107-115,共9页Blasting

基　　金：国家自然科学基金(51874189)。

摘　　要：为探究不同爆破切口圆心角及高度对冷却塔整体倒塌效果的影响,采用ANSYS/LS-DYNA有限元软件,对结构的倒塌过程进行复现,验证数值模拟的可靠性。在原模型基础上,仅改变爆破切口圆心角和高度,选定14 m、15 m、16 m、17 m、18 m五种爆破切口高度和190°、210°、230°三种爆破切口圆心角,将其正交排列组合,探究两者对爆破效果的影响。得到以下结论:爆破切口圆心角对冷却塔爆堆范围的变化起着主要作用,爆破切口高度起次要作用;爆堆最高点基本位于倒塌中心线上,且分布在塔壁横向断裂位置附近,结构后方塔壁的裂隙出现位置和破碎程度决定了结构爆堆高度和爆堆高度最高点出现的位置;在爆破切口高度一定时,结构的竖向触地速度随爆破切口圆心角的增加而减小;当爆破切口角度圆心角一定时,随着爆破切口高度的不断增加,结构的竖向触地速度呈现先减后增的趋势;此类冷却塔结构爆破拆除时的最优爆破切口圆心角为210°,最优爆破切口高度为17 m。To investigate the influence of different blast incision central angles and heights on a cooling tower′s overall collapse effect,the structure′s collapse process was simulated by ANSYS/LS-DYNA finite element software.The original model was modified to explore the effects of various blasting incision′s central angles and heights.Five different blasting incision heights(14 m,15 m,16 m,17 m,18 m)and three blasting incision central angles(190°,210°,230°)were selected for orthogonal combination to analyze their impact on the collapse effect.The results indicate that the blasting incision′s central angle significantly influences the distribution range of the collapse debris,while the blasting incision height plays a secondary role.The highest point of the pile is generally located along the collapse centerline and near the transverse fracture of the tower wall.The degree of fragmentation and location of fissures on the rear tower wall determine the height and location of the highest point of the debris pile.At a fixed blasting incision height,the vertical touchdown velocity of the structure decreases as the incision′s central angle increases.Conversely,at a fixed incision central angle,the vertical touchdown velocity decreases and then increases with increasing incision height.The optimal demolition parameters for the cooling tower are a blasting incision angle of 210°and a blasting incision height of 17 m.

关 键 词：爆破拆除 爆破切口参数 数值模拟 冷却塔 爆破效果 

分 类 号：TU746.5[建筑科学—建筑技术科学]