基于应力吸收层的“白改黑”路面温度应力有限元分析
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摘要
研究改性沥青混合料应力吸收层在"白改黑"路面结构中的受力状态,对于其材料组成设计具有指导意义。根据弹性层状理论体系,采用Abaqus工程模拟有限元软件建立基于应力吸收层的"白改黑"路面三维有限元模型,对比分析直接加铺方案与设应力吸收层方案,分析低温条件下降温幅度、应力吸收层厚度及模量、基础模量变化对加铺层结构温度应力的影响。分析结果显示:应力吸收层在低温条件下,随着降温幅度的增加应力集中现象越明显;模量增加,层底温度应力增大,为减缓反射裂缝的产生和扩展,应力吸收层厚度在3 cm左右较为适宜。
The stress state of the modified asphalt mixture stress absorption layer in the structure of "white to black"pavement is of guiding significance to its material composition design. According to the elastic layer theory system,using Abaqus engineering simulation finite element software to establish a three-dimensional finite element model of white modified black pavement based on the stress absorption layer,the results of the direct paving scheme and the stress absorption layer scheme were analyzed and compared. The effects of the change of cooling range,thickness and modulus of stress absorbing layer and base modulus on temperature stress of pavement structure under low temperature were analyzed. The results indicate that the stress concentration is more obvious with the increase of cooling range under low temperature condition. When the modulus increases,the temperature stress at the bottom increases. In order to slow down the generation and expansion of reflection cracks,the thickness of the stress absorption layer around 3 cm is more appropriate.
The stress state of the modified asphalt mixture stress absorption layer in the structure of "white to black"pavement is of guiding significance to its material composition design. According to the elastic layer theory system,using Abaqus engineering simulation finite element software to establish a three-dimensional finite element model of white modified black pavement based on the stress absorption layer,the results of the direct paving scheme and the stress absorption layer scheme were analyzed and compared. The effects of the change of cooling range,thickness and modulus of stress absorbing layer and base modulus on temperature stress of pavement structure under low temperature were analyzed. The results indicate that the stress concentration is more obvious with the increase of cooling range under low temperature condition. When the modulus increases,the temperature stress at the bottom increases. In order to slow down the generation and expansion of reflection cracks,the thickness of the stress absorption layer around 3 cm is more appropriate.
引文
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2廖卫东.基于应力吸收层的旧水泥混凝土路面沥青加铺层结构与材料研究[D].武汉:武汉理工大学,2007Liao Weidong.Study on the structure and material of asphalt overlay on old cement concrete pavement based on stress absorption layer[D].Wuhan:Wuhan University of Technology,2007
3叶建.旧水泥混凝土路面加铺沥青面层的力学性能分析[D].成都:西南交通大学,2011Ye Jian.Analysis of mechanical properties of asphalt overlay on old cement concrete pavement[D].Chengdu:Southwest Jiaotong University,2011
4张丽娟,陈晓生,骆亚军.旧水泥沥青加铺层路面结构温度场及热力分析[J].科学技术与工程,2018,18(12):292-298Zhang Lijuan,Chen Xiaosheng,Luo Yajun.The temperature field simulation and the thermomechanical analysis of asphalt overlay on the oldportland cement pavement[J].Science Technology and Engineering,2018,18(12):292-298
5王孙富.沥青路面结构温度场与温度应力的数值模拟分析[D].哈尔滨:哈尔滨工业大学,2010Wang Sunfu.Numerical simulation analysis of temperature field and temperature stress of asphalt pavement structure[D].Harbin:Harbin Institute of Technology,2010
6付凯敏,徐立红,陈京钰.不同沥青路面结构温度场研究[J].公路工程,2009,34(2):53-59Fu Kaimin,Xu Lihong,Chen Jingyu.Study on the temperature field of different asphalt pavement structures[J].Highway Engineering,2009,34(2):53-59
7杨学良,刘伯莹.沥青路面温度场与结构耦合的有限元分析[J].公路交通科技,2006,23(11):1-9Yang Xueliang,Liu Boying.Finite element analysis of temperature field and structure coupling of asphalt pavement[J].Journal of Highway Communication Technology,2006,23(11):1-9
8张晴原,杨洪兴.建筑用标准气象数据手册[M].北京:中国建筑工业出版社,2012Zhang Qingyuan,Yang Hongxing.Typical meteorological database handbook for buildings[M].Beijing:China Building Industry Press,2012