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三维有限元法对水泥混凝土道面接缝传荷作用的模拟方法研究

, PP. 32-38

Keywords: 道路工程,水泥混凝土道面,三维有限元,接缝传荷能力,接缝刚度,集料嵌锁,传力杆

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Abstract:

在调研、参考国内外相关研究成果的基础上,首先简要介绍了道面接缝传荷力学行为理论,而后总结出应用三维有限元软件模拟接缝传荷作用的3种方法弹簧单元法、虚拟材料层法和实体建模法;详细叙述了3种方法的假设条件和模拟步骤,归纳了3种方法的优缺点及适用性;基于大型通用有限元分析软件Abaqus,分析了虚拟材料层法中虚拟材料模量取值与接缝传荷能力的对应关系。通过对3种方法的比较分析得出弹簧单元法应用最为普遍,模拟效果较好,但设置繁琐,计算代价大;虚拟材料层法设置简单,计算代价小,但无法模拟接缝本身的力学行为(集料嵌锁力和传力杆);实体建模法可以用于研究传力杆本身的力学行为,但建模复杂,且无法考虑集料嵌锁效应。

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