高文乐,王燕萍,刘志成,李元振,李传水,吴超

• 1:山东科技大学土木工程与建筑学院
• 2:山东房源实业集团有限公司
• 3:枣庄市金星爆破有限公司

摘要(Abstract)：

为进一步研究爆破切口高度对小高宽比框架结构倒塌效果的影响规律，利用ANSYS/LS-DYNA有限元软件，通过建立分离式共节点钢筋混凝土框架结构模型，根据倒塌角理论，依次取倒塌角为20°、25°、30°、35°、35°(松动爆破)、40°。对6种不同爆破切口下结构的倒塌效果进行模拟，将数值模拟结果导入到后处理软件LS-PrePost中进行处理，将1 s作为时间间隔，以结构竖向塌落速度小于200 mm/s为倒塌完成时刻并与工程实际进行对比。研究结果表明：随着爆破切口高度的增加，积累能量也就越多，结构的后坐距离也不断增加，且增速呈上升趋势；而爆堆高度和爆破切口的高度成反比，且随切口高度的增加逐渐趋于稳定。对爆破拆除小高宽比框架结构的类似工程要尽量避免过大的爆破切口高度，合适的爆破切口高度为上仰夹角在30°～35°。

关键词(KeyWords)： 框架结构;分离式共节点;爆破切口;数值模拟;爆破拆除

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51874189)

作者(Author): 高文乐,王燕萍,刘志成,李元振,李传水,吴超

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