摘要
采用三维有限元法分析了Sampave应力吸收层厚度变化对沥青加铺层结构荷载应力和温度应力分布的影响,发现合理厚度的Sampave应力吸收层能较大幅度地降低加铺层层底的荷载应力和温度应力,对后者降低效果尤为明显,改善了整个沥青面层结构的应力状态,减少加铺层层底应力集中程度,延缓反射裂缝在加铺层中形成,显示其在抗反射裂缝方面的独特作用.计算结果表明:应力吸收层不宜太厚,建议层厚为2.5±0.5cm较合适.
The impact of Sampave thickness on load stress and thermal stress of asphalt overlay was analyzed with the 3- D finite element method, which show Sampave may decrease load stress and thermal stress at the bottom of the overlay under its rational thickness, especially, for the latter, and improve the stress distribution of the whole overlay, reduce the stress concentration at the bottom of the overlay, delay reflective cracks. So Sampave takes an excellent role in delaying and preventing reflective cracks. The results indicate there is a reasonable scope for Sampave thickness and suggest it belongs to 2.0-3.0cm.
出处
《河北工业大学学报》
CAS
2008年第2期82-85,共4页
Journal of Hebei University of Technology
基金
国家西部交通建设科技项目(200231800030)
