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旧水泥混凝土路面上沥青薄层罩面力学响应分析
Analysis of mechanical response of Bituminous Concrete thin over-layer on old Concrete Pavement
【摘要】 为了研究旧水泥混凝土路面上沥青薄层罩面的力学行为,运用BISAR程序对荷载作用下旧水泥混凝土路面上沥青薄层罩层层内及层间力学的响应规律做了分析,通过定义最不利值探讨了材料和荷载参数变化对罩面层结构应力的影响。结果显示:超载对罩面层的影响比罩面层厚度和模量的增加对罩面层的影响要大;当荷载、罩面层模量、罩面层厚度同时增加50%时,罩面层模量对减小εmax、γmax最有利,增大模量可以减小剪切变形,增强路面的抗滑移能力;从减小最大剪应力γmax的效果来看,增大罩面层模量比增加罩面层厚度更合理。
【Abstract】 In order to survey the technical behavior of bituminous concrete thin over-lay,used BISAR program to analysis the mechanical response rule in the layer and interface caused by the traffic load,and through defining value of the most disadvantaged,discussed the impact of over-lay structural stress on material and load parameters variety.The results showed that the impact of overload is larger than the impact of over-lay thickness and modulus.When load,over-lay thickness and over-lay modulus at the same time an increase of 50%,over-lay modulus on the effect of reducing the maximum strain and maximum shearing strain are most obvious,rising modulus conducive to reduce shear strain and it can be able to enhance anti-slip capacity.Increasing over-lay modulus can be more reasonable than increasing over-lay thickness to reduce maximum shearing strain.
【Key words】 bituminous concrete; mechanical response analysis; multi-layer system old cement concrete; thin over-lay;
- 【文献出处】 公路工程 ,Highway Engineering , 编辑部邮箱 ,2010年04期
- 【分类号】U416.216
- 【被引频次】23
- 【下载频次】268