合肥工业大学学报(自然科学版)
閤肥工業大學學報(自然科學版)
합비공업대학학보(자연과학판)
JOURNAL OF HEFEI UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE)
2014年
7期
835-838
,共4页
钟耀标%韩丁%朱俊骅%李凌林
鐘耀標%韓丁%硃俊驊%李凌林
종요표%한정%주준화%리릉림
道路工程%参数识别%数值计算%黏弹性%现场承载板
道路工程%參數識彆%數值計算%黏彈性%現場承載闆
도로공정%삼수식별%수치계산%점탄성%현장승재판
road engineering%parameter identification%numerical simulation%viscoelasticity%field loading plate
文章采用理论分析与现场检测相结合的方法获得沥青路面顶面的当量黏弹性模量。根据现场承载板法检测得到的数据,使用有限元软件及二次开发程序建立计算模型,反算沥青路面顶面黏弹性参数,并选用0.4 MPa压力下的独立实测数据验证模拟结果的准确性。数值模型分别使用Prony级数法和UMAT法,计算得到的回弹变形与实测数据较接近,表明2种方法对黏弹性参数反算都具有合理性。随着加载的增大,具有二次开发能力的UMAT法更接近实测结果。沥青路面顶面黏弹性参数反算法是对当前规范中当量回弹模量法的改进,可为路面设计及日后的养护与改建提供量化的参数依据。
文章採用理論分析與現場檢測相結閤的方法穫得瀝青路麵頂麵的噹量黏彈性模量。根據現場承載闆法檢測得到的數據,使用有限元軟件及二次開髮程序建立計算模型,反算瀝青路麵頂麵黏彈性參數,併選用0.4 MPa壓力下的獨立實測數據驗證模擬結果的準確性。數值模型分彆使用Prony級數法和UMAT法,計算得到的迴彈變形與實測數據較接近,錶明2種方法對黏彈性參數反算都具有閤理性。隨著加載的增大,具有二次開髮能力的UMAT法更接近實測結果。瀝青路麵頂麵黏彈性參數反算法是對噹前規範中噹量迴彈模量法的改進,可為路麵設計及日後的養護與改建提供量化的參數依據。
문장채용이론분석여현장검측상결합적방법획득력청로면정면적당량점탄성모량。근거현장승재판법검측득도적수거,사용유한원연건급이차개발정서건립계산모형,반산력청로면정면점탄성삼수,병선용0.4 MPa압력하적독립실측수거험증모의결과적준학성。수치모형분별사용Prony급수법화UMAT법,계산득도적회탄변형여실측수거교접근,표명2충방법대점탄성삼수반산도구유합이성。수착가재적증대,구유이차개발능력적UMAT법경접근실측결과。력청로면정면점탄성삼수반산법시대당전규범중당량회탄모량법적개진,가위로면설계급일후적양호여개건제공양화적삼수의거。
In order to obtain the equivalent viscoelastic parameters on the top of asphalt pavement sur-face ,a method combining theoretical analysis and field tests was used .According to the data from field loading plate tests ,the calculation models were established by using the finite element software and the secondary development process to inversely calculate viscoelastic parameters of asphalt pave-ment .The independent measured data under 0.4 MPa pressure was selected to verify the accuracy of simulation result . The methods of Prony series and User-Defined Material Mechanical Behavior (UMAT) were used in the numerical model respectively .The calculated rebound deformations were close to the measured data ,so the reasonableness of the two methods was proved .With the increasing pressure ,the simulated results by using UMAT method ,which has the secondary development abili-ty ,were more close to the measured field results .The inverse calculation method of viscoelastic pa-rameters can provide a quantitative computational basis for pavement design ,maintenance and recon-struction ,and it is an improvement on the current method of equivalent rebound modulus .