DefinePK

Abstract

The objectives of this study are to evaluate the optimum design of tendon profile layout, to study the effect of tendon profile layout on the structural performance of post-tensioned concrete bridge model, and to investigate the locations effect of anchorages points of tendons on the vertical deflection. There were four factors were selected such as bending moment, shear force, stress, and vertical deflection. According to supports of tendons, there are two cases of bridges models. The first case is used simply-supported tendons profile layout. The second case is adopted continuous tendons profile layout. According to profile layout of tendons, the first case consists of seven bridge models (7-Models) and the second case includes ten bridge models (10-Models). The results of FEM analysis showed that the tendon profile layout had important effect on the structural performance of post-tensioned concrete bridges according to types and number of anchorages points of tendons. For pre-stressed load stage, simply-supported tendon profile model appeared maximum value of upward vertical deflection (3mm) was more than continuous tendon model (2mm). The maximum downward vertical deflection is 12mm within continuous tendon model which is less than value of simply-supported tendon model (13mm). According to service load stage analysis, continuous tendon model had the minimum value of downward vertical deflection (14mm) was more than simply-supported tendon model (15mm), but maximum value of downward vertical deflection was appeared in simply-supported tendon model (27mm) was more than the maximum value of downward vertical deflection (26mm) within continuous tendon model. It can be concluded that continuous tendon profile model was convenient for design of post-tensioned concrete bridge because it can be resisted service loads and had the lower value of vertical deflection.