摘要
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。
Basing on investigation of relevant research achievements at home and abroad, the joint load transfer mechanical behavior theory of pavement is introduced briefly, and then 3 methods to simulate the load transfer of joints of cement concrete pavement in 3D finite element software are summarized： spring element method, virtual material layer method, and solid modeling method. The assumptions and simulation steps of the 3 methods are described in detail, and their advantages, disadvantages and applicability are summarized. The relation between the value of virtual material modulus in virtual material layer method and joint load transfer ability is analyzed by using general finite element analysis software Abaqus. By comparing and analyzing the 3 methods, it is concluded that （1） spring element method is applied widely, it has good simulation effect, but it is difficult to be operated and calculated; （2） virtual material layer method is easy to be realized and has low calculation cost, but it cannot simulate the mechanical behavior （aggregate interlock and dowel） of joints ; （3） solid modeling method can be used to study the mechanical behavior of dowel, but its model is complex and cannot be used to consider the aggregate interlock effect.
出处
《公路交通科技》
CAS
CSCD
北大核心
2013年第3期32-38,共7页
Journal of Highway and Transportation Research and Development
关键词
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
road engineering
cement concrete pavement
3D finite element
joint load transfer efficiency
joint stiffness
aggregate interlock
dowel
