高文乐,孙鸿,寇玉明,闫桐庆,王燕萍,刘卫东,徐明

• 1:山东科技大学土木工程与建筑学院
• 2:济南城建集团
• 3:保利澳瑞凯管理有限公司

摘要(Abstract)：

为了控制框架-剪力墙结构在爆破拆除后的爆堆高度和后坐距离，以青岛某框架-剪力墙结构居民楼爆破拆除工程为研究对象，利用ANSYS/LS-DYNA软件，对倒塌角度和跨间延期时差正交组合的不同爆破方案进行模拟分析。首先，建立了原方案有限元模型，通过对比实际与模拟结果，验证了模型合理性；其次，仅改变模型的跨间延期时差与切口高度，讨论了结构后坐距离、爆堆高度分别随着二者变化而变化的趋势；然后，基于多方案数值模拟结果，分别提出了后坐距离、爆堆高度二者与切口高度和跨间延期时差相互关系的半定量公式，从而分别确定了结构后坐距离、爆堆高度最小情况下的跨间延期时差和切口高度；最后，分析了框架-剪力墙结构拆除爆破时合理的跨间延期时差以及爆破切口高度的范围。研究结果表明：在相同的切口高度下，各模型后坐距离大都随爆破区段跨间延期时差的延长先减小后增大，在相同跨间延期时差下，爆破切口高度越大，后坐距离就越大，同时，爆堆高度大致都随延期时差的延长而降低。对于此类框架-剪力墙结构，合适的跨间延期时差在270～420 ms之间。大爆破切口可以降低爆堆高度，而小爆破切口又能够有效控制后坐，对确定框架-剪力墙结构爆破拆除的切口高度和跨间延期时差具有一定的指导意义。

关键词(KeyWords)： 爆破工程;拆除爆破;框架剪力墙结构;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金（51874189）~~

作者(Author): 高文乐,孙鸿,寇玉明,闫桐庆,王燕萍,刘卫东,徐明

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