Nonlinear static analysis of cable-stayed bridge considering semirigid connections

Studying the structures under the effect of incremental lateral loads and achieving the capacity curve of structure are defined as nonlinear static analysis. The speed and ease of results interpretation in this method is more than that of the NRHA. Hence, for seismic assessment of cable-stayed bridge with semirigid connections, nonlinear static analysis method is employed in this paper. The impact of connection flexibility is investigated in the two separated states (the connection of deck to tower and the supports of tower). The cable-stayed bridge is modeled in the OpenSees software based on the load control. In addition, the maximum base shear and lateral displacement results, calculated in different nodes of bridge tower, are reported. According to responses, the rate of displacement increasing due to decrease of connection flexibility is about 15 percentages less than that of caused by reducing tower supports rigidity.

کلیدواژه ها:

Cable-stayed bridge ، nonlinear static analysis ، semi-rigid connection ، load control method ، OpenSees software