基于AEM法的爆破拆除倒塌过程的数值模拟  

Numerical simulation of the collapse process of blasting demolition based on AEM method

作　　者：杨小卫[1] 许君风[1] 胡江春[1] YANG Xiao-wei XU Jun-feng HU Jiang-chun(School of Civil Engineering and Architecture,Zhongyuan University of Technology,Zhengzhou 450007,Chin)

机构地区：[1]中原工学院建筑工程学院,郑州450007

出　　处：《工程爆破》2017年第2期11-16,共6页Engineering Blasting

基　　金：国家自然科学基金资助项目(51574296)

摘　　要：利用应用单元法(AEM法),以含填充墙的某多层框架结构定向爆破拆除为例,进行倒塌过程的数值模拟。结果表明:在框架结构爆破切口形成后,结构由于重力作用逐渐沿横向偏转,并在横向最外侧的一排柱上形成活动铰,产生翻转倒塌,模拟结果与实际倒塌结果基本相符。在倒塌的过程中,结构爆破切口的横向很快进入大变形倒塌,同时引起横向隔墙的平面失去稳定而倒塌。落地的倒塌碎块,在纵向产生150kN左右的峰值冲击力,在横向产生30~50kN的峰值冲击力。基于仿真结果,可以定量设置防护措施,避免安全隐患。The numerical simulation of the collapse process of directional blasting demolition was carried out by using the unit method （AEM method） and the demolition of a multi-layer structure with infilled wall. The results showed that after the for-mation of the blasting notch of the frame structure, the structure gradually deflected along crosswise because of the gravity and the movable hinge was formed on the outermost row of columns and then turned down. The simulation results were in good a-greement with the actual collapse results. In the process of collapse, the crosswise of the structure blasting notch fell into the large deformation collapse quickly, while breaking lateral wall＇s stability and it collapsed. The falling fragments of the floor pro-duced a peak impact force of about 150 kN in the longitudinal direction and created a peak impact force of 30 - 50 kN in the lateral direction. Based on the simulation results, the quantitative protection measures could be set to avoid security risks.

关 键 词：应用单元法 框架填充墙结构 爆破拆除 倒塌过程 数值模拟 

分 类 号：TD235.4[矿业工程—矿井建设]