摘要
随着爆破拆除结构及其所处环境日趋复杂,爆破拆除理应向拆除过程可控制、爆破效果可预测的方向发展。采用共用节点分离式建立模型,运用ANSYS/LS-DYNA软件模拟框架结构定向爆破拆除的倒塌过程。通过改变材料的失效应力分析了不同材料强度对结构倒塌效果的影响,数值模拟结果表明材料强度与倒塌位移成正相关。通过对混凝土和钢筋单元应力—时程曲线的分析指出共用节点分离式模型能够较好地反映混凝土和钢筋2种材料的力学性能差异。
Following the structure and exvironment of explosive demolition object becoming more complicated, the explosive demolition technology should develop in the direction towards that process is controllable and result is predictable. The separate model based on common node is used to simulate the collapse process of directional explosive demolition of framed structure by means of ANSYS/LS-DYNA software. We try to analysis the influence by dif- ferent materials＇ strength makes on the result of structure collapse through changing materials＇ failure stress. The numerical results show that material＇ strength is correlated positively with collapse displacement. Through the analysis of the stress-time curve of reinforced concrete element, it is indicated that the separate model based on common node can reflect the difference of mechanical properties between steel and concrete.
出处
《爆破》
CSCD
北大核心
2011年第3期1-3,33,共4页
Blasting
基金
甘肃省科技计划资助(科技支撑计划项目1011GKCA019)
甘肃省建设科技攻关项目(JK2010-43)
