基于有限元界面模型的路面拼接粘结行为分析

Analysis of Pavement Jointing Interfacial Adhesive Behavior Based on Finite Element Interface Model

建立新老路面拼接结构的三维有限元模型,引入界面单元模拟拼接部位界面粘结剂的特征,根据界面单元内应力及张开位移,得出了拼接粘结界面剂的特性参数与临界粘结强度的关系曲线,求出了在对称荷载作用下拼接结构界面剂的粘结强度临界值,粘结界面破坏时的最大张开位移越大,则在拼接结构中要求的临界粘结强度越小.

A 3-Dimention finite element model was founded and interface element was employed to simulate the characteristic of the interfacial agent at the joint. The paper presents a relationship curve between the characteristic parameter of the jointing interfacial agent and the critical adhesive strength, and also the critical adhesive strength value of the jointing interracial agent under symmetrical load. Results show that the required critical adhesive strength decreases when the maximum opening displacement of the adhesive interface at failure point increases.