Spatial Analysis on Deviation Block of External Prestressed Bridge with Finite Element Software

The Unity Bridge between Tanzania and Mozambique as the background project, the deviation block of external prestressing are analyzed with ANSYS software. When the deviators holes inner diameter are enlarged 1.5 times from 130 mm because the different deviators are applied, the concrete stresses and cracks state are introduced in detail, some suggestions for construction are presented. The results prove that the deviation blocks´ safeties are enough for the deviators exchange without modification of design, which avoid the construction delay and save the design fee for design modification.