连续配筋水泥混凝土路面脱空状态下荷载应力参数影响分析

Load stress of continuously reinforced concrete pavement slab with base erosion

利用ABAQUS有限元软件,建立板底脱空状态下的三维有限元模型,研究不同脱空尺寸下,板厚、混凝土弹性模量、基层厚度、基层模量、裂缝宽度对CRCP板荷载应力的影响。结果表明,随脱空尺寸的增大,CRCP板的拉应力增长幅度先增大后减小,挠度增长幅度则持续增大;板厚的增加以及裂缝宽度的减小可以明显减小脱空状态下的荷载应力和挠度;混凝土模量、基层厚度和模量的增加对脱空状态下的荷载应力和挠度影响不大。

With ABAQUS finite element software,a 3D finite element model of slab bottom void state was established,and the influence of slab thickness,concrete elastic modulus,base thickness,base modulus and crack width on load stress of CRCP slab under different base erosion sizes was studied.The results showed that with the increase of base erosion size,the growth rate of tensile stress first increased and then decreased,while the deflection increased continuously;the increase of slab thickness and the decrease of crack width could significantly reduce the load stress and deflection under base erosion condition;the increase of concrete modulus,base thickness and modulus had little effect on the load stress and deflection under base erosion state.