边界元分区子域法研究混凝土构件的断裂特性 | |
邵永波 ; 岑章志 ; 李涛 ; 杜之富 ; SHAO Yong-bo ; CEN Zhang-zhi ; LI Tao ; DU Zhi-fu | |
2010-06-08 ; 2010-06-08 | |
关键词 | 混凝土构件 粘性裂纹 边界元分区子域法 断裂破坏 双K参数 concrete structures cohesive crack sub-domain boundary element method fracture failure double K-parameter O346.1 |
其他题名 | FRACTURE CHARACTERISTICS OF CONCRETE STRUCTURES USING SUB-DOMAIN BOUNDARY ELEMENT METHOD |
中文摘要 | 混凝土构件发生断裂破坏时材料内部的裂纹呈现粘性特征。采用边界元分区子域法建立了求解混凝土构件粘性裂纹扩展过程的离散化方程,并利用该法分析了有初始裂纹的三点弯曲梁试件的断裂破坏过程,得到了构件破坏过程中荷载与加载点挠度之间的关系曲线,确定了混凝土梁发生失稳断裂时的临界荷载。此外,利用边界元分区子域法模拟分析混凝土三点弯曲梁试件的断裂过程中得到的裂纹口张开位移,计算了衡量混凝土构件断裂过程中的双K参数:起裂韧度和断裂韧度。通过和试验测试结果的对比,发现边界元分区子域算法得到的数值模拟结果和试验结果吻合很好,从而证明该方法在分析混凝土构件断裂破坏过程的精确性和可靠性。; The crack is cohesive when fracture failure occurs in concrete structures. The discretized equations for simulating the propagation of cohesive crack in concrete structures are built using sub-domain boundary element method. Using this method, the fracture failure process of notched three-point bending beams is analyzed, and the relationship between the applied loads and the deflections is then obtained. The critical load at the unstable fracture point of the concrete beams is determined. Additionally, the double-K parameters, the so-called initial fracture toughness and unstable fracture toughness which are used to judge the fracture process of concrete structures, are calculated based on the crack mouth opening displacement (CMOD) obtained from sub-domain boundary element method. A comparison with the experimental results demonstrates that the sub-domain boundary element method can yield results agreeable well with the experimentally measured results. Thus, it can be concluded that the presented method is accurate and reliable in the analysis of the fracture process of concrete structures.; 山东省教育厅基金项目(J05F01) |
语种 | 中文 ; 中文 |
内容类型 | 期刊论文 |
源URL | [http://hdl.handle.net/123456789/51236] |
专题 | 清华大学 |
推荐引用方式 GB/T 7714 | 邵永波,岑章志,李涛,等. 边界元分区子域法研究混凝土构件的断裂特性[J],2010, 2010. |
APA | 邵永波.,岑章志.,李涛.,杜之富.,SHAO Yong-bo.,...&DU Zhi-fu.(2010).边界元分区子域法研究混凝土构件的断裂特性.. |
MLA | 邵永波,et al."边界元分区子域法研究混凝土构件的断裂特性".(2010). |
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