裂缝形式和参数对路面动力性能的影响

对于半刚性基层沥青路面,裂缝是常见的病害,对于不同的裂缝形式和参数,对路面造成的影响不同。行驶状态下的路面由于路表不平等原因,行车荷载对路面的作用往往以瞬间冲击荷载形式发生,落锤式弯沉仪(FWD)荷载为冲击荷载,可以很好的模拟行车荷载对路面的动力作用。本文针对路面在不同裂缝间距、宽度和开裂深度情况下对破损路面进行分析。对于此类动力问题的求解,有限元法是比较成功的方法之一。建立真实可靠的路面模型,是对破损路面进行分析的关键,同时对补强设计提供正确依据。

Dynamic Effects of Pavement on Crack Form and Parameters

For asphalt pavement with the semirigid base,crack is a common disease,different cracks form and for different parameters cause the different effects on the pavement.The pavement under driving,the role of traffic load on the road often occur instantaneously forms of impact loading because the pavement is not smooth.Falling weight deflectometer（FWD） load as the impact load can be well simulated traffic load on road dynamic action.The pavement is analyzed on differnet crack spacing depth and width.For such a dynamic problem solving,finite element method is the best method.Establish the true and reliable pavement model is a critical analysis of damaged pavement,and provide the basis for the design of reinforcing.