沥青路面力学响应的三维有限元分析-岩土工程专业论文.docxVIP

沥青路面力学响应的三维有限元分析AbStract 沥青路面力学响应的三维有限元分析 AbStract With the cOntinuing rapid development of the natiOⅡal cconomy aⅡd scientific and technological pfogress， the highway asphalt paVement structure gets more increasingly wide application． Attendant problems are oVerload—driVing， 0ver speed-driVing gettiⅡg mofe and more wofse，and the early injury of the asphalt pavement structure becoming more and more seriously． This paper adOpt finjce element analysis prOgram ANSYS and the typicaI appropfia￡e semi—rigid base asphan concIete paVcment st『uctufe was selected to establish as calculation model aim at the abOvc problems，and simulate the actual situation processing the numerical model aⅡalysis． The analysis is based oⅡ mechanics response of the road stfucturc，mainly considered the highway longitudinal gfade， the automobile brakiⅡg force and overload etc．，these iⅡnuence impacted on road structure．The results of the aⅡalysis show that the highway IOⅡgitudinal grade had little jnfluence on paVement performance．But the automobile braking force had destructiVe influence on it．The braking foIce emerged stress concentratioⅡ at the ftont and back edge of tyre grounding location， which gives the asphalt pavement structure endure greater pfessure and pu}l stress．Although lhe intensity Qf thatⅡot feach to the tensile sfreⅡgth and the compressive strength of the asphalt pavement ，which wi儿not directly lead to the destructjon of roads，but little damage to the road surface when cracks appeared，such sIress state will be conducive to the raPid deVelOpment of road early injury．so lhe sectiDn of highway ffequeⅡIly injuries lateral Ioad esPeciaIly in uphill、downhiIl of that of sections，the automobile braking force damages paVement performance seriously． Overload is another main influeⅡce factor injurjng the paVement structure．It caused road denectiOn value has increased，which will greatly reduce the use of road performance and shorten the usefullife of the road，and the bigger the oVerload，the