Development of prestressed T-beams made of textile reinforced UHPC

In comparison to ordinary concrete beams, the reduction of the dead weight by using high performance materials leads to larger possible span to height ratios. However, to avoid excessive deformations, it is planned to applicate carbon fiber reinforced polymer (CFRP) bars as prestressing members. Due to the lack of valid codes for prestressed CFRP bars in UHPC, preliminary investigations are planned, including tests on the transfer length of different types of CFRP bars in UHPC. The main goal of these tests is to determine the necessary concrete cover needed to avoid splitting cracks at the load introduction. This paper contains a detailed description of the test specimens, the test setup as well as preliminary test results. Based on this investigation it is planned to develop innovative prestressed material-fitting T-beams made of textile reinforced UHPC.