Study On Characteristics Of Continuously Reinforced Concrete Hollow Pavement

Continuous reinforced concrete pavement(CRCP),as a kind of pavement structure with high strength,good integrity and suitable for heavy-duty traffic,has been widely studied by scholars in recent years.From the continuous reinforced concrete pavement performance,bilayer reinforced CRCP performance,AC + CRCP performance are hot research.In this paper,a continuously reinforced concrete hollow pavement(CRCHP)is designed to improve the pavement temperature field,save materials and play an effective role in some special environments.By means of finite element analysis,the load stress,temperature field,temperature stress,and the pavement performance change under the change of related parameters are analyzed.This paper mainly carries out the following work:(1)analyzing the load stress of CRCHP,calculating the critical load position of the four-side free slab with different crack spacing,and analyzing the parameter influence of the critical load position,determining the parameters which have great influence on the load stress,and introducing the load stress formula of CRCHP.(2)the temperature field of CRCHP is analyzed,and the characteristics of temperature field of CRCHP are determined by simulating the temperature exchange between pavement structure and environment.The influence of the parameters on the temperature field is analyzed,and the larger parameters on the temperature field are found out.(3)analyze the temperature stress of CRCHP,calculate the temperature warping stress of the pavement under the action of the maximum temperature gradient,and analyze the influence of the related parameters such as the hole arrangement on the temperature stress.Through the analysis of the influence of the parameters,the parameters which are influenced by the temperature stress are determined,and the calculation formula of the temperature stress of the hollow slab is fitted.(4)analyzing the pavement characteristics of CRCHP,comparing the temperature field,load stress and temperature stress distribution characteristics of several pavements,combining the current code for the CRCP structural design method,determine the pavement stress calculation and structure design method of CRCHP,and put forward the pavement characteristics.