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本文针对某实际住宅砖混结构燃气爆炸事故,采用简化燃气爆炸模型,用ABAQUS有限元软件进行三维非线性动态数值分析,模拟了该住宅在燃气爆炸下的破坏情况,并与住宅实际破坏情况进行对比。分析表明该住宅砖混结构在燃气爆炸下破坏严重,与结构的实际破坏情况相符。在此基础上改变砖混结构的构造措施,分析了不同构造措施对砖混结构抗燃气爆炸的影响。研究表明,采用整体的现浇钢筋混凝土楼板、圈梁和构造柱是提高砌体建筑局部抗燃气爆炸性能以及避免局部破坏引发整体倒塌的有效手段,本文提出的数值方法对模拟砖混结构在燃气爆炸下的反应是一种有效的手段。
In this paper, for a real residential brick and concrete structure gas explosion accident, the simplified gas explosion model is adopted and the three-dimensional nonlinear dynamic numerical analysis is carried out by ABAQUS finite element software to simulate the destruction of the residential house under the gas explosion and carry out the actual destruction of the residential house Compared. The analysis shows that the masonry-concrete structure of the residential building is severely damaged under the explosion of gas and conforms to the actual damage of the structure. On the basis of this, the construction measures of brick-concrete structure are changed, and the influence of different construction measures on the anti-gas explosion of brick-concrete structure is analyzed. The research shows that using the whole cast-in-place reinforced concrete slab, ring beam and structural column is an effective way to improve the local anti-gas explosion performance of masonry building and prevent the local collapse caused by local damage. The numerical method proposed in this paper is helpful to simulate the structure of brick- The reaction under the explosion is an effective means.