内爆作用下RC框架结构填充墙泄爆面积研究

Study on the explosion area of RC frame structure reinforced explosion relief composite wall under the action of implosion

为了研究RC框架结构在内爆作用下设置加固泄爆组合墙体合理的泄爆面积。运用ANSYS/LSDYNA有限元软件建立2层3×3跨RC框架结构模型,其中角部和中部房间墙体分别设置3组不同泄爆面积的有限元模型,对其破坏形态和压力时程曲线进行对比分析。结果表明:在40 kg TNT当量下,设置加气混凝土砌块墙体的角部和中部房间,泄爆面积分别占墙体面积的11.3%和11.6%时,结构构件均破坏严重;设置加固泄爆组合墙体面积约为70 m^(2)的角部房间,泄爆面积占墙体面积的63.7%~70.6%时,结构构件破坏较轻,结构整体完好;设置加固泄爆组合墙体面积约为67 m^(2)的中部房间,泄爆面积占墙体面积的33.7%~51.5%时,结构构件未发生破坏,有利于保护建筑结构。

In order to study the reasonable explosion discharge area of reinforced explosion discharge composite wall under internal explosion of RC frame structure.In this thesis,ANSYS/LSDYNA finite element software is used to establish a 2-story 3×3-span RC frame structure model,in which three groups of finite element models with different explosion discharge areas are set for the corner and middle room walls respectively,then the failure mode and pressure time history curve are compared and analyzed.The results show that when the corner and middle rooms of aerated concrete block wall are set at 40 kg TNT equivalent,the structural members are seriously damaged when the explosion discharge area accounts for 11.3%and 11.6%of the wall area respectively;a corner room with a combined wall area of about 70 m^(2)is set.When the blasting area accounts for 63.7%~70.6%of the wall area,the damage of structural members is relatively light and the structure is intact as a whole;set up a central room with a combined wall area of 67 m 2.When the blasting area accounts for 33.7%~51.5%of the wall area,the structural members are not damaged,which is conducive to the protection of the building structure.