CAJ | 학술논문

为了研究半刚性基层沥青路面早期破坏现象,采用移动荷载下黏弹性层状体系动力学模型,分析典型路面结构的动力响应,研究轴重、速度和胎压对面层底部剪应变和面层内部剪应变分布的影响.结果发现,随着轴重和胎压的增加,当速度减小时,面层内部剪应变和面层底部剪应变均增加;轴重较小时,车辆对路面产生的破坏主要发生在上中面层,而轴重较大时,产生的破坏主要发生在中下面层:胎压的变化对2-8 em深度范围内的剪应变影响严重,随着胎压的升高,出现最大剪应变的深度位置减小.
위료연구반강성기층력청로면조기파배현상,채용이동하재하점탄성층상체계동역학모형,분석전형로면결구적동력향응,연구축중、속도화태압대면층저부전응변화면층내부전응변분포적영향.결과발현,수착축중화태압적증가,당속도감소시,면층내부전응변화면층저부전응변균증가;축중교소시,차량대로면산생적파배주요발생재상중면층,이축중교대시,산생적파배주요발생재중하면층:태압적변화대2-8 em심도범위내적전응변영향엄중,수착태압적승고,출현최대전응변적심도위치감소.
To study the premature disruption of the semi-rigid base asphalt pavement,a multi-layer viscoelastic dynamic model where the vehicle load is handled as moving load was used to analysis the dynamic response of the typical semi-rigid base asphalt pavement,and the influences of the axle load,the vehicle speed and the tire pressure on the shearing strain at the bottom of the AC layer and the shearing strain distribution in the AC layer were studied.It showed that the shearing strains increase with the increase of the axle load and the tire pressure,and increase with the decrease of the vehicle speed.Especially,when the axle load is rather small.the destory of the vehicle exerting on the pavement is mainly took place at the wearing surface layer and the middle surface layer,while when the axle load is rather big,the destory is mainly set at the middle surface layer and the low surface layer.The tire pressure has a notable influence on the shearing strain at the depth range from 2cm to 8cm.With the increase of the tire pressure,the depth where the maximum shearing strain occures becomes shallower.