填充墙对框架结构内爆炸效应的影响

Infilled wall influence on internal explosion of the frame structure

利用ANSYS/LS-DYNA建立了一个一层一跨的框架结构和一个一层的2×2的框架结构的三维有限元模型。首先对已有实验结果进行数值模拟,并将实验结果与数值模拟结果进行对比,对比结果表明,所采用的数值模拟计算方法能较好地模拟框架结构的内爆炸效应。在此基础上,通过不同工况的对比,对填充墙对框架结构内爆炸效应的影响进行研究。研究表明,对于炸药所在的房间,填充墙对框架结构所受爆炸作用有明显的加强效果,使得框架结构的破坏更加严重;而对于其他与炸药所在房间相隔填充墙的房间,填充墙的存在明显减小了框架结构所受的爆炸作用。

ANSYS/LS-DYNA program is used in analysis, a three-dimensional finite element model of a frame structure with one span, one story and a frame structure with two spans, two stories were established. Firstly, the existing test results were numerically simulated and the test results were compared with the results of numerical simulation, the compare results indicated the numerical simulation method of this paper could provide a right simulation result about the explosion inside the frame structure. On this basis, study the influence of infilled wall on the internal explosion of the frame structure through the contrast of different working conditions. The study indicated the in_filled wall had obvious strengthening effect on the explosive force when the explosive was in the room;but when the explosive was not in the room,the infilled wall significantly reduced the explosive force.