Cement Concrete Pavement Structure Defects 3-D Finite Element Analysis Under Load And Temperature Stress

With the increase of standard of national economic,highway construction highway transportation is being in a new development period.The higher rigidity better transferring ability of traffic load and stability of pavement structure characterize cement concrete pavement(CCP),the CCPhas the merits of better applicability,more estensive sources of materials and being constructed easily.so the CCP can meet the need of mordern transportation well ,But because the deficient of design theoretical,the insufficient of manipulation experience and the disregard of maintain,result in many CCP appeared structural damage and functional limitation,it impacted the quality of highway seriously, therefore, with refined analysis of CCP structures,it not only useful to update,the design theory of CCP,but also helpful to reduce the structural demage,continue its use life.The paper is divided six part. The first part is preamble ,in this part,it give the simple intruduce mainly aimed at CCP assortment,study purport and meaning,study actuality . in addition, at the last of this part also give the simple statment about what should be do on the whole paper.The second part systemic analysed the common problems with the old CCP, and give out the compositive prescription and precaution. The third part analysed the affect under the parometer change such as the thickness of slab,the length of slab,the modulus,the modulus of base,play effect the CCP.educe the displacement response curve and speed response curve which functioned by the locomote the mobile load of vehicle,and compared with the max stretch stress at the bottom of slab and largest displacement by the effect of CCP load.The fourth part analysed the influence that every parameter change to temperature curve stress.compared the change to thermal stresses under the positive temperature gradient and negative temperature.The fifth part analysed the reason of CCP void scathe,by calculation demonstrated the scathe,if this scathe can not be apropos find and remedy,it will be result in the rupture of the slab at last,and effect the natural use of roadway.The sixth part is the last part of the all paper. It concluded the work of this paper,and give the suggests about the study contents and direction what should be continue in the next work.