内爆法建筑倒塌过程和局部构件破坏数值模拟

为了探究内爆法拆除技术机理,通过混凝土本构MAT96,结合整体式建模对某建筑内爆法拆除的倒塌过程进行数值模拟,并对建筑物在倒塌过程中局部构件的破坏损伤情况进行分析研究,表明采用内爆法爆破拆除钢筋混凝土框架结构高层建筑物时,其倒塌过程强化了构件间相互的碰撞冲击挤压作用,能有效减少了结构体触地后的碰撞冲击能,被拆除建筑物的塌落振动效应也会随之降低,对于拆除爆破中结构构件破碎与解体的主要作用为构件间的碰撞冲击作用。

Numerical Simulation of Structure Collapse by Implosion Method and Local Component Failure Analysis

In order to explore implosion method demolition technology,the concrete constitutive MAT96 and monolithic model were used to simulate the buildings collapse and the destruction behavior of the local component in the collapse process. The results showed that in demolition of high buildings of reinforced concrete frame structure by implosion method,the collapse process strengthened the collision impact in the components and further effectively re-duced the structure touchdown and vibration effects. The collision impact between the components played an impor-tant role in crushing and breaking the building structure in explosive demolition.