Abstract: The?asphalt?pavement?of?newly-buih?roads?in?China?adopts?the?double?group?uni-axle?load?100?kN?（BZZ-100）as?the?standard?axle?load,which?is?designed?by?the?multi-layer?flexible?design?theory?under?the?effect?of?double-circle?uniformly?distributed?load.?But?the?load?that?vehicle?imposes?on?the?road?surface?is?the?moving?load.?FEM?analysis?on?the?dynamic?re-?sponse?of?road?surface?in?the?eases?of?vehicle?running?at?common?speed?and?at?the?state?of?baking?is?carried?out,?through?establishing?the?three?dimensional?dynamic?FEM?model?of?semi-rigid?surface?pavement.?The?time?course?curves?of?the?vertical?displacement,?the?vertical?stress,?the?horizontal?stress,?the?vertical?shear?stress?and?the?horizontal?shear?stress?of?nodes?at?different?depth?which?is?underneath?the?load?are?obtained.?The?calculation?results?are?compared?with?those?under?the?static?load.

Key words: moving load , intersections , non-linear , finite element method ;

摘要： 我国新建道路沥青路面是以双轮组单轴载100kN(BZZ-100)为标准轴载,采用双圆均布荷载作用下的多层 弹性理论进行设计的,而汽车实际施加给路面的是移动荷载。通过建立半刚性基层路面的三维有限元分析模型, 对汽车匀速行驶及制动情况下路面的动态响应进行了有限元分析,得出了荷载正下方不同深度处节点竖向位移、 竖向压应力、水平应力、竖向剪应力及水平剪应力的时间历程曲线,并与静载作用下的计算结果进行了对比分析。

关键词: 移动荷载, 道路交叉口, 非线性, 有限元