混凝土道路荷载传递规律及荷载场形态分析

Analysis of load transfer law and load field form of concrete road

为了研究混凝土道路荷载传递规律及应力场形态,以各道路结构层材料强度相同,但各层厚度不同的混凝土道路为研究对象,通过理论推导和Midas GTS NX数值分析,对混凝土道路在荷载作用下的传递规律以及荷载作用下的应力场的三维形态进行了分析。通过分析发现:当集中力作用在路面上时,应力响应随着深度的增加呈衰减趋势,面层中应力衰减慢,而在基层中应力衰减速度快;车荷载作用下道路中的应力场形态为三维近似半圆体;应力大小和深度为非线性关系,当应力衰减到垫层时接近零,变化规律为水平方向远离车荷载应力越来越小,垂直方向随着深度增加应力也越来越小。

In order to study the concrete road load transfer rule and stress field of form, to the road of the same but different thickness structure layer material strength concrete road as the research object, through theoretical derivation and Midas GTS NX numerical analysis, the concrete road under the load transfer law and loads of stress field of three-dimensional forms are analyzed. The results show that when the concentrated force is applied to the pavement, the stress response attenuates with the increase of the depth. The stress attenuates slowly in the surface layer, but fast in the base layer. The stress field on the road under vehicle load is a three-dimensional approximate semicircle. The relationship between stress and depth is nonlinear. When the stress attenuates to the cushion, it approaches zero. The variation rule is that the stress in the horizontal direction is less and less away from the vehicle load, and the stress in the vertical direction is less and less with the increase of depth.