Abstract
PCC-AC composite pavement has the advantages of high carrying capability and excellent comfort. The maximum temperature gradient formula of PCC-AC composite pavement in Guangxi region is fitted. The loading stress, thermal stress and coupling stress in AC layer of with dowel bar can significantly reduced. All kinds of stresses are also decreased with the narrow dowel bar space. Therefore, the Shrinking joints of composite pavement with dowel bars can greatly reduce the probability of reflection crack initiation. As the thickness of AC layer, there is greater influence on thermal stress and coupling stress than on loading stress, The loading stress, thermal stress and coupling stress in PCC layer decreases with the thickness increasing of AC layer, their relationship is linear. The loading stress and coupling stress of PCC layer reduce significantly with increasing the PCC thickness. AC layer also plays a role in reducing the loading stress and coupling stress of PCC layer.
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