CAJ | 학술논문

针对水泥混凝土路面拓宽罩面结构的受力特征,通过现行设计规范对复合式路面疲劳应力进行了验算,采用有限元对碾压混凝土刚性基层因路基差异沉降引起的板顶横向和竖向应力分布进行了计算。结果表明,随着路基差异沉降量的增加板顶最大横向拉应力亦增大,为满足碾压混凝土3.5 MPa设计弯拉强度的要求,新旧路基差异沉降量应控制在50 mm范围内。
침대수니혼응토로면탁관조면결구적수력특정,통과현행설계규범대복합식로면피로응력진행료험산,채용유한원대년압혼응토강성기층인로기차이침강인기적판정횡향화수향응력분포진행료계산。결과표명,수착로기차이침강량적증가판정최대횡향랍응력역증대,위만족년압혼응토3.5 MPa설계만랍강도적요구,신구로기차이침강량응공제재50 mm범위내。
According to the stress characteristics of the overlay-widened cement concrete pavement structure,the fatigue stress of composite concrete pavement was checked using the calculation formulas in current design specification.Meanwhile,the distribution of transverse stress and vertical stress on the top of cement concrete slab caused by differential settlement of subgrade were calculated using finite element method.The results showed that the maximum transverse stress on the top of cement concrete slab increases if differential settlement of subgrade increased.Therefore,the differential settlement of subgrade should be controlled within 50 mm in order to satisfy the design flexural strength of 3.5 MPa for roller compacted concrete.