移动荷载作用下 CRCP 横向裂缝处力学响应分析

摘要

In order to investigate the mechanical response of Continuously Reinforced Concrete Pavement(CRCP )under moving load,a three-dimensional numerical model for the semi-rigid base cracked CRCP was presented by using ABAQUS,the moving load has been implemented into ABAQUS code as user subroutines Vdload.Analyzed the vertical displacement of CRCP,axial stress of longitudinal reinforcement,shear stress on the bottom of CRCP by changing the influence factors of crack width,rein-forcement arrangement,load,slab thickness,driving speed,It is concluded that the dynamic response of CRCP is sensitive to crack width,reinforcement arrangement,load;pavement thickness,vehicle speed have relatively small impact.In the same ratio of reinforcement,it is suggested to use the reinforcement ar-rangement of “small diameter,small spacing”.It is necessary to take preventive measures and dispose transverse cracks,and strict control of the vehicle overloading.%为揭示移动荷载作用下连续配筋混凝土路面（CRCP）的动力响应特征，应用 ABAQUS 建立了典型半刚性基层上带裂缝 CRCP 路面三维计算模型，通过编制 Vdload 子程序来施加移动荷载。考虑缝宽、配筋方式、荷载、板厚、车速等影响因素，以裂缝处竖向位移、钢筋应力、板底剪应力为主要评价指标，计算结果表明：裂缝宽度、配筋方式和车载大小对路面动力响应影响较大，板厚和车速影响相对较小，因此必须对横向裂缝做好预防和处置，在相同配筋率下，建议采用“小直径、小间距”配筋方式，并严格控制车辆超载。