Analysis of a Tendon Bridge Considering Vehicular Loading Using CSI Bridge Software

Abstract

Precast bridges with segmental structure are commonly used for long span bridges. Time dependent elements such as creep, shrinkage, and relaxation, among others, create consi derable variation in stresses throughout the life of long span bridges, and seismic evaluation becomes crucial and imperative in such a condition. Time-dependent variables like creep, shrinkage, and relaxation, among others, have been highlighted in past analysis. In the analysis of balanced cantilever bridge, however, the present codes and authorities in this field suggest the lump sum provisions, leading to inadequate estimation of residual strength/service stress which may lead to critical conditions. If such bridges are subjected to earthquake forces/actions, the criticality could be higher and lead to unacceptable conditions. As a result, the analysis should be revised to account for the combined effects of time-dependent characteristics and seismicity. Because such studies are scarce or unknown, the Csi bridge has been used to investigate the seismic behavior of a precast segmental bridge while taking into consideration time-dependent elements.
The outcome of this study is reported such as, impact of time dependent factors and seismicity on analysis of balanced cantilever bridge and its comparison with conventional methods of analysis. The combined impact of seismicity and time dependent properties of the design moment of precast segmental bridge is compared with steel tendons and without steel tendons.