九层框架结构拆除爆破切口方式数值模拟对比分析

针对武汉市中自小区楼房爆破中的一栋九层框架结构进行爆破拆除数值模拟分析，利用ANSYS/LS-DYNA有限元软件进行建模，运用整体式建模对九层框架小高宽比结构采用三角形切口和梯形切口2种切口模式进行对比，3个爆区通过瞬间删除单元模拟爆破拆除柱子，得到框架拆除爆破的爆堆高度、前冲距离、后坐距离。对比分析2种切口形式爆破，小高宽比结构使用梯形切口能够得到更好的模拟结果。数值模拟分析结果与实际工程相吻合，可为类似拆除爆破提供数值模拟参考。

Numerical simulation and comparative analysis of demolition blasting cut mode of nine-story frame structure

The numerical simulation analysis of blasting demolition of a nine-story frame structure of the building in Wuhan city was carried out.The ANSYS /LS-DYNA finite element software was used to model，and the overall model was used to compare the small ratio of height and width structure of the nine-story frame.The triangle notch and trapezoidal notch were used to compare.The three blasting zones were simulated by deleting the column.The muck pile height，the maximum distance in pediment direction and the maximum distance in recoil direction were obtained.Two kinds of notch pattern were compared and analyzed，and the results showed that the small high width ratio structure used trapezoidal notch to get better simulation results.The numerical simulation results were in good agreement with the actual project，which can provide reference for the numerical simulation of similar demolition blasting.