RCC—AC复合式路面反射裂缝应力强度因子的有限元分析  

Finite Element Analysis of Stress Intensity Factor of the Reflecting Crack in RCC-AC Composite Pavement

作　　者：祝云琪[1] 曾四平[2] 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海200092 [2]宝钢工程技术有限公司规划设计部,上海201900

出　　处：《公路工程》2008年第4期51-53,74,共4页Highway Engineering

摘　　要：从复合式路面反射裂缝的产生机理出发,着重研究了位于RCC板接缝一侧的偏荷载对反射裂缝的影响,利用有限元法计算了偏荷载作用下反射裂缝的应力强度因子。在AC层与RCC板之间设一Goodman夹层单元,用以模拟两板在不同情况下的结合;为了反映裂缝尖端的奇异性,在裂尖周围设置了奇异等参单元,并与试验结果相比较,该法得出的结果与实验结果相符,说明了该法的可行性。最后给出相应的算例,并得到具有实际意义的结论。Starting from the producing mechanism of reflecting crack of RCC-AC composite pavement, this text emphasizes on studying the influence of the deflection load which is at the one side of RCC lab jointed to the reflecting crack. It uses finite element method to analyze the crack tip＇ s stress intensity factor. This text sets up a fictitious Goodman interlayer element between AC layer and RCC lab to reflect the two layers＇ different unity. In order to reflect the singularity of the crack tip, the text sets isoperimetric elements at the crack tip. The outcomes of this method are compared with experiment, and the outcomes are unanimous, which illuminate the flexibility of this method. At last this text presents some relative examples and it obtains some practical meaningful theories.

关 键 词：RCC—AC复合式路面 反射裂缝 夹层单元 应力强度因子 

分 类 号：U412.37[交通运输工程—道路与铁道工程]