CAJ | 학술논문

为了研究车辆随机荷载作用下刚性路面的动态响应，基于 ANSYS 软件，应用1／4车辆模型，得出其在路面不平度激励下的随机荷载，简化了荷载的求解，建立了路面三维有限元模型，讨论了在随机荷载作用下结构层参数对路面动位移幅值及面层层底拉应力幅值的影响规律。结果表明，面层厚度和土基模量对路面动位移幅值影响最大，当面层厚度超过30 cm、土基模量超过60 MPa 时，继续增大以上结构层参数路面动位移幅值不再有明显减少；当土基模量小于60 MPa 继续减少时，要实现路面动位移幅值的不变，需要增加的面层厚度幅度逐渐变大；面层模量及厚度对面层层底拉应力幅值影响最大。
위료연구차량수궤하재작용하강성로면적동태향응，기우 ANSYS 연건，응용1／4차량모형，득출기재로면불평도격려하적수궤하재，간화료하재적구해，건립료로면삼유유한원모형，토론료재수궤하재작용하결구층삼수대로면동위이폭치급면층층저랍응력폭치적영향규률。결과표명，면층후도화토기모량대로면동위이폭치영향최대，당면층후도초과30 cm、토기모량초과60 MPa 시，계속증대이상결구층삼수로면동위이폭치불재유명현감소；당토기모량소우60 MPa 계속감소시，요실현로면동위이폭치적불변，수요증가적면층후도폭도축점변대；면층모량급후도대면층층저랍응력폭치영향최대。
In order to study the dynamic response of a rigid pavement under vehcle random loads,a vehicle random load excited by pavement surface roughness was obtained with application of a 1 /4 vehicle model based on ANSYS,the load-solving was simplified.Then,a 3D finite element model of the pavement was established to discuss the influences of structural parameters on the maximum dynamic displacement and the maximum bottom tensile stress of the surface layer under the random load.The calculated results indicated that subgrade modulus and surface layer thickness have significant effects on the maximum dynamic displacement;when the surface layer thickness is more than 30 cm,the subgrade modulus is more than 60 MPa,continuously increasing these parameters can not cause the maximum dynamic displacement to decrease obviously;when the subgrade modulus is less than 60 MPa,it needs a gradual increase in surface layer thickness to keep the maximum dynamic displacement from changing while the subgrade modulus decreases;the surface layer modulus and thickness have the largest influence on the maximum bottom tensile stress of the surface layer.