随机车辆荷载下排水沥青路面动力响应分析OA

To investigate the coupled dynamic responses of the permeable asphalt pavement system under random vehicle loads,an analytical solution method based on the superposition principle was proposed.Firstly,a random vehicle load was obtained based on a 1/4 vehicle model under pavement roughness excitation,and a multi-layer permeable asphalt pavement model was established according to Biot's poroelasticity theory.Secondly,the governing equations were transformed into an orthogonal vector function coordinate system using the Fourier-Bessel series(FBS)method.Combined with the dual variable and position(DVP)method,the interlayer transfer relationships of the multi-layer permeable asphalt pavement were derived.Finally,the random vehicle load was equivalent to a circular random load input into the model,and analytical solutions for responses such as displacement,stress,and pore water pressure were obtained through superposition calculation.The results show that the proposed method exhibits favorable computational stability and low time consumption,with the analytical solutions showing high agreement with existing numerical examples.Pavement roughness,vehicle speed,and pavement structural permeability have significant impacts on the dynamic responses of the permeable asphalt pavement structure,which provides theoretical reference for asphalt pavement structural design,maintenance,and service life extension.