CRC+AC复合式路面的合理配筋率

针对CRC+AC复合式路面的结构特点和现有研究的不足,对现行规范的纵向配筋设计进行了分析,运用传热学理论和有限元法,研究了AC层的温度效应,计算和分析了AC层温度效应对CRC+AC复合式路面纵向配筋率的影响规律。研究结果表明:CRC+AC复合路面结构的纵向配筋设计不需要考虑剥落、渗水和冲断破坏,只需考虑钢筋的拉断破坏即可;由于AC层的隔热作用明显,CRC+AC复合路面结构的纵向配筋率可以相应减少,以AC层厚度10 cm为例,CRC层的纵向配筋率可减少0.12%左右;钢筋的架设建议采用滑动支架,纵向钢筋的连接建议采用绑扎方式,搭接长度约为35倍钢筋直径。

Reasonable Reinforcement Ratio of Continuously Reinforced Concrete Composite Asphalt Pavement

Focused on the structure characteristics and the flaws of existing studies of CRC+AC composite pavement,longitudinal reinforcement design in current specifications was analyzed.By using heat transfer theory and finite element method,temperature effect of AC layer was researched,and the influence of temperature effect of AC layer on longitudinal reinforcement ratio of CRC+AC composite pavement was calculated and analyzed.The results show that(1)longitudinal reinforcement design of CRC+AC composite pavement needs not to consider spalling,seepage and thrust failure,just needs to consider tensile failure of reinforcement;(2)longitudinal reinforcement ratio of CRC+AC composite pavement can be reduced due to the efficient heat insulation of AC layer,for instance,the thickness of AC layer is 10 cm,the longitudinal reinforcement ratio of CRC layer can be reduced by about 0.12%.It is recommended that the sliding stent be used in reinforcement erection,the banding way be used to joint longitudinal reinforcement,and the overlapped length is about 35 times the reinforcement diameter.