基于流形元群缝追踪的钢筋混凝土结构破坏模拟  

Simulation of tracing multi-crack and fracture for reinforced concrete structure by the manifold method

作　　者：张国新[1] 黄涛[1] 赵妍[1] 彭校初[1] 

机构地区：[1]中国水利水电科学研究院结构材料研究所,北京100038

出　　处：《中国水利水电科学研究院学报》2009年第4期257-263,共7页Journal of China Institute of Water Resources and Hydropower Research

基　　金：国家自然科学基金重大资助项目(50539020;50539010)

摘　　要：对石根华提出的流形元法进行了改进,在一阶位移形函数的基础上扩展到二阶位移模式,开发了用断裂力学法模拟离散裂缝的扩展及用杆单元模拟钢筋作用的流形元法,用以模拟钢筋混凝土结构破坏过程。对于含有大量节理裂隙的结构,采用传统的摩尔-库伦准则,允许裂缝不仅沿原有的不连续面扩展,而且可以穿过完整介质,导致结构体的破坏。用扩展后的软件模拟钢筋混凝土梁结构的破坏,考虑变形和渗流耦合作用,分析了五强溪船闸闸墙的大变形问题。结果表明,破坏形态符合实际情况,并且再现了结构破坏过程,为今后研究此类问题提供了新思路。The authors present an improved manifold method which was based on the method proposed by G H Shi,by introducing the 2^（nd） order displacement function and developing a new algorithm,in which the fracture mechanics method was used to simulate the crack and fracture of structure and the bar element was used for simulating reinforce bar or bolt.For structure with multi-joint-cracks,the Mohr-Coulomb criterion was adopted.Fracture mode of reinforced concrete structure with different reinforcement ratio is simulated with the new method.Considering the crack propagation and seepage action,the authors simulated the process of crack initiation and propagation for the Wuqiangxi ship lock during water level rising.The result showed that failure mode simulated numerically agreed well with the real situation and well re-presented the mechanism of structure failure. The new method would provide a new approach in studying the simidar issues.

关 键 词：流形元 钢筋混凝土结构 群缝追踪 破坏模拟 

分 类 号：TV313[水利工程—水工结构工程]