Pushover analysis of square double-column piers with considering the pile-soil-structure interaction

In order to investigate the effects of different lateral loading patterns and boundary conditions, a square double-column piers model was chosen as an example. The statistical results of six time history analyses were taken as the benchmark for comparison research of Pushover analysis with four common lateral loading patterns. The results of numerical analyses indicate that the errors of static loading method are biggest, the constant acceleration method takes second place, and the modal method of the specified vibration mode is smallest. The errors of the M-phi curves method are larger with the increase of axial compression ratio. For square double-column piers, by comparison, the modal method can get more reasonable results.