Abstract
Finite element model analysis was performed with respect to patterns of load transfer relying on the action of aggregate interlocking and on the concurrent action of aggregate interlocking and dowel bars. The best timing for dowel bar retrofit was determined by way of increase in load transfer efficiency and maximum tensile stress borne at joints. The situation of dowel bar retrofit to restore load transfer efficiency was verified by way of onsite tests and economic analysis performed before we came to the conclusion that the way of dowel bar retrofit to restore load transfer efficiency is fairly cost effective. The construction technique of dowel bar retrofit to restore load transfer efficiency is finally summarized in light of engineering practice.
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