TA374 : Evaluation of bearing capacity in concrete pavement joints with and without dowel bar
Thesis > Central Library of Shahrood University > Civil & Architectural Engineering > MSc > 2017
Authors:
Salman Naghavi Moghaddam [Author], [Supervisor]
Abstarct: When the joints in concrete pavement are implemented with larger distances or pavement is under heavy loading, using Dowel Bars in contraction and construction joints makes the load transferring possible. The Dowel Bars are a means of transferring loads through the concrete pavement dowel. In the present research, two types of joints were examined, one of which was built using dowel bar and the other was constructed without dowel bar (movement joints). A review of literature reveals that almost no field-experimental research to find an appropriate alternative for dowel bars has been done in Iran. In the present thesis, three concrete dowels were constructed and after implementing two types of expansion joints, one with dowel bar and the other without dowel bar (movement joint), the two joints were compared in terms of charge transfer coefficient in pavement on dry roadbeds and pavement on impregnated roadbeds. Their bearing capacities were compared using Portable Falling Weight Deflectometer (PFWD) and in the joint without dowel bar the movement joint was implemented in order to increase the shear capacity. Results showed that the load transfer in the joint with dowel bar is ideal in dry roadbeds; however, it's not desirable in impregnated roadbeds which show a nine percent decrease in load transferring. Besides, load transfer in joints without dowel bar (movement joints) in dry roadbeds is about two percent less than load transfer in joints with dowel bars, but it has a better performance in impregnated roadbeds.
Keywords:
#concrete pavement #Dowell Bar #Load transfer coefficiency #PFWD Link
Keeping place: Central Library of Shahrood University
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