含裂缝沥青路面橡胶应力吸收层的最佳参数研究

发布时间：2018-11-10 17:32

【摘要】：目的找出不同等级交通荷载作用下沥青路面橡胶应力吸收层的最佳参数,从而提高路面的使用寿命.方法应用ABAQUS有限元软件建立含裂缝沥青路面三维力学模型,通过层底各应力和裂缝尖端应力强度因子的比较分析,确定橡胶应力吸收层的防裂效果;通过应力吸收层的模量和厚度与裂缝尖端处面层层底各应力的关系,确定最佳模量和厚度.结果在标准荷载BZZ-100作用下,橡胶应力吸收层的最佳模量建议取600 MPa,最佳厚度取2.5 cm.橡胶应力吸收层能够顺利的延缓并控制反射裂缝.在重载交通作用下,应力吸收层的最佳模量建议取800 MPa,最佳厚度取3 cm.结论路面橡胶应力吸收层可以对路面裂缝的产生起到抑制作用,应力吸收层的弹性模量及厚度直接影响路面裂缝的产生.
[Abstract]:Objective to find out the best parameters of rubber stress absorption layer of asphalt pavement under different traffic loads, so as to improve the service life of asphalt pavement. Methods the three-dimensional mechanical model of asphalt pavement with cracks was established by using ABAQUS finite element software. The crack prevention effect of rubber stress absorbing layer was determined by comparing and analyzing the stress intensity factors at the bottom and crack tip. The optimum modulus and thickness are determined by the relationship between the modulus and thickness of the stress absorption layer and the stress at the bottom of the layer at the crack tip. Results under the action of standard load BZZ-100, the optimum modulus of rubber stress absorption layer is suggested to be MPa, and 2.5 cm.. Rubber stress absorption layer can delay and control the reflection crack smoothly. Under the action of heavy traffic, the optimum modulus of the stress absorption layer is suggested to be 800 MPa, and the optimum thickness is 3 cm.. Conclusion the rubber stress absorption layer can inhibit the formation of pavement cracks, and the elastic modulus and thickness of the stress absorption layer directly affect the formation of pavement cracks.
【作者单位】：沈阳建筑大学理学院;沈阳建筑大学土木工程学院;
【基金】：国家自然科学基金项目(51478276) 辽宁省自然科学基金项目(2014020070)
【分类号】：U416.217

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