华南理工大学学报（自然科学版）
華南理工大學學報（自然科學版）
화남리공대학학보（자연과학판）
JOURNAL OF SOUTH CHINA UNIVERSITY OF TECHNOLOGY(NATURAL SCIENCE EDITION)
2015年
4期
41-47
,共7页
沥青路面%动荷载%弯拉应力%轴载换算%数值计算
瀝青路麵%動荷載%彎拉應力%軸載換算%數值計算
력청로면%동하재%만랍응력%축재환산%수치계산
asphalt pavement%moving load%flexural stress%axle load conversion%numerical calculation
为研究复杂工况下的动态轴载换算，分析了车辆移动荷载作用下沥青路面的动力响应，对数值计算的有效性和车辆行驶特性的影响进行了研究，并提出了动态轴载换算公式。基于二维Lamb问题验证了数值计算的有效性，并建立刚性基层沥青路面的三维动力学数值模型，分析不同车速、路面摩擦系数和轴载等因素的影响。当荷载匀速移动时，轴载和路面摩擦系数对路面动力响应的影响明显，考虑摩擦系数的动态轴载换算指数明显大于静态荷载。结合车辆和路面多种影响因素的三维有限元计算模型更符合沥青路面结构的实际受力状态，动态轴载换算公式可用来改进当前的规范设计。
為研究複雜工況下的動態軸載換算，分析瞭車輛移動荷載作用下瀝青路麵的動力響應，對數值計算的有效性和車輛行駛特性的影響進行瞭研究，併提齣瞭動態軸載換算公式。基于二維Lamb問題驗證瞭數值計算的有效性，併建立剛性基層瀝青路麵的三維動力學數值模型，分析不同車速、路麵摩抆繫數和軸載等因素的影響。噹荷載勻速移動時，軸載和路麵摩抆繫數對路麵動力響應的影響明顯，攷慮摩抆繫數的動態軸載換算指數明顯大于靜態荷載。結閤車輛和路麵多種影響因素的三維有限元計算模型更符閤瀝青路麵結構的實際受力狀態，動態軸載換算公式可用來改進噹前的規範設計。
위연구복잡공황하적동태축재환산，분석료차량이동하재작용하력청로면적동력향응，대수치계산적유효성화차량행사특성적영향진행료연구，병제출료동태축재환산공식。기우이유Lamb문제험증료수치계산적유효성，병건립강성기층력청로면적삼유동역학수치모형，분석불동차속、로면마찰계수화축재등인소적영향。당하재균속이동시，축재화로면마찰계수대로면동력향응적영향명현，고필마찰계수적동태축재환산지수명현대우정태하재。결합차량화로면다충영향인소적삼유유한원계산모형경부합력청로면결구적실제수력상태，동태축재환산공식가용래개진당전적규범설계。
In order to investigate the dynamic axle load conversion in complex conditions, the dynamic response of as-phalt pavement subjected to moving load is analyzed, the validity of the numerical calculation and the influence of vehi-cle characteristics are discussed, and a conversion formula of the dynamic axle load is set up.Then, based on the two-dimension Lamb problem, the effectiveness of the numerical calculation is verified, and a three-dimension dynamic nu-merical model of asphalt pavement with rigid base is established to analyze the effects of vehicle speed, road surface fric-tion coefficient and axle load.The results show that, when the vehicle moves at a constant speed, both the axle load and the road surface friction coefficient remarkably influence the dynamic response of pavement;and that the conversion co-efficient of the dynamic axle load considering the friction coefficient is significantly greater than that of the static axle load.Moreover, it is found that the three-dimension finite element model, which takes into consideration various affec-ting factors of the vehicle and the asphalt pavement, accords well with the actual stress state of asphalt pavement struc-ture;and that the presented conversion formula is feasible in improving the current design specifications.
