STUDY ON THE SEISMIC PERFORMANCE OF THE TOWER CRANE FOR CONSTRUCTION

Abstract

Many tower cranes were damaged by the Hyogo-ken Nanbu earthquake in 1995. There were two kinds of serious damage types. But the strength of those damaged tower cranes corresponded to the design code. The causes of these damages were examined by the numerical analysis simulation. The reason for the cause that damage grew up was that the seismic force amplified with the building was input to the tower crane. Therefore, the damage of tower cranes connected with the building was serious. However, the seismic performance of the tower cranes improves by the friction dampers installed in the stays.