DETERMINATION OF PNEUMATIC TYRE/PAVEMENT INTERFACE CONTACT STRESSES UNDER MOVING LOADS AND SOME EFFECTS ON PAVEMENTS WITH THIN ASPHALT SURFACING LAYERS
DETERMINATION OF PNEUMATIC TYRE/PAVEMENT INTERFACE CONTACT STRESSES UNDER MOVING LOADS AND SOME EFFECTS ON PAVEMENTS WITH THIN ASPHALT SURFACING LAYERS
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发表时间：
1997
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影响因子：
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通讯作者：
M. Beer;C. Fisher;F. Jooste
中科院分区：
文献类型：
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作者：
M. Beer;C. Fisher;F. Jooste
本文描述了车辆轮胎三维轮胎/路面接触应力的量化。车路表面压力传感器阵列 (VRSPTA) 系统旨在测量移动载荷下的接触应力，即运动应力 (SIM)。给出了基于七种不同轮胎类型的轮胎充气压力和负载的量化这些应力的预测方程。轮胎充气压力主要控制轮胎中心路面上的垂直接触应力，而轮胎负载控制轮胎边缘处的垂直接触应力。分析表明，在瞬时过载/充气不足条件下，沥青面层中的最大变形应变能（SED）出现在轮胎边缘附近，而在瞬时均匀垂直应力条件下，SED 发生在轮胎中心的沥青面层内。除了改进建模的载荷/接触应力理想化之外，这一发现可能对路面相对较薄的沥青面层的设计具有重要意义。
This paper describes the quantification of three-dimensional tyre/pavement contact stresses for vehicle tyres. The Vehicle-Road Surface Pressure Transducer Array (VRSPTA) system was developed to measure contact stresses under moving loads, i.e., Stress-In-Motion (SIM). Prediction equations for quantification of these stresses, based on tyre inflation pressure and loads for seven different tyre types, are given. Tyre inflation pressure predominantly controls the vertical contact stresses on the pavement at the tyre centre, whereas the tyre load controls those at the tyre edges. Analysis indicated that during instantaneous overloading/under-inflated conditions the maximum strain energy of distortion (SED) in the asphalt surfacing occurs close to the tyre edges, while under instantaneous uniform vertical stress conditions the SED is within the asphalt surfacing at the tyre centre. In addition to improved load/contact stress idealization for modelling, this finding may have important implications for the design of relatively thin asphalt surfacing layers for pavements.