摘要
离散单元法是模拟结构破坏的一种有效的分析方法。通过引入节点单元和考虑混凝土的非线性对矩形离散单元模型进行了改进,并给出了改进后离散单元模型的破坏准则和基本方程以及弹簧系数等计算参数的确定;改进后的模型采用了双链表技术,提高了模型的计算效率。对在爆炸荷载作用下的钢筋混凝土框架结构的倒塌破坏过程进行了模拟,结果表明:采用改进后的离散单元法可以有效地模拟钢筋混凝土框架结构的倒塌破坏过程。
Discrete element method has been an effective approach for simulating damage process of structures. A rectangular discrete element model is extended by applying nodal element and considering the non-linearity of concrete material in this paper. The failure criterion, formula and determination of analytical parameters such as spring modulus of the extended model are presented. The computational efficiency of the extended model is improved by applying double listing technique in the program. The collapse process of reinforced concrete frame due to explosion is simulated. Results show that the extended discrete element method achieves good simulation of collapse process of reinforced concrete frame structures.
出处
《工程力学》
EI
CSCD
北大核心
2005年第4期67-73,共7页
Engineering Mechanics
关键词
钢筋混凝土
框架结构
数值模拟
离散单元法
倒塌破坏
reinforced concrete
frame structure
numerical simulation
discrete element method
collapse
