DURABILITY EVALUATION WITH WHEEL RUNNING TESTS AND COMPUTATIONAL SIMULATIONS ON PRECAST PC SLAB WITH HALF RIGID JOINT UNDER THE NEGATIVE BENDING MOMENT

Abstract

 Wheel running tests have been conducted on precast PC slabs jointed with only fillers under the maximum negative bending moment assumed on the intermediate support of actual plate girder bridge. Constant repetitive moving load of 250kN was applied on Slabs jointed with polymer cement mortar and epoxy resin mortar, and these specimens showed interfacial fracture with smaller number of cycles than expected. Meanwhile, tensile fatigue tests have been also conducted on two kinds of fillers, and the different S-N curves were observed between the fillers and concrete.

 Considering the above tests, computational simulations have been conducted. Firstly, the history of the stress on the interference of joints until initial damage was investigated by reproducing wheel running tests. Secondly, the actual durability of slabs jointed with the fillers was evaluated by parametric analysis with negative bending moment and repetitive moving load.