蒙云琪,倪明亮,操鹏,王宇,李小贝,孙金山,张兆龙

• 1:中铁四院集团岩土工程有限责任公司
• 2:中国地质大学(武汉)

摘要(Abstract)：

爆破拆除的铁四院前大楼为砖混外套框架的"楼包楼"特殊结构,周边环境复杂。为确定合理的爆破拆除方案和爆破参数,控制其倒塌姿态和爆堆范围,利用ANSYS/LS-DYNA有限元软件,建立分离式耦合模型,对多个拆除爆破方案进行模拟分析,确定了单向折叠爆破方案,并对折叠爆破方案中的切口起爆时差,立柱破坏部位,立柱爆高等参数进行优化,其中上下切口起爆时差调整为1020 ms,中间与两侧时差为880 ms,后排支撑区立柱实施松动爆破,同时提高上切口立柱爆破高度。采用优化方案,建筑物被成功爆破,结构折叠形态明显,爆破效果理想。实际爆破结果表明,爆破切口的形成和闭合、结构倒塌过程、塌落范围与形态等与模拟结果基本一致。

关键词(KeyWords)： 框架结构;爆破拆除;数值模拟;方案优化

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 蒙云琪,倪明亮,操鹏,王宇,李小贝,孙金山,张兆龙

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