Abstract
Since many container cranes loading and unloading with vessels were damaged during the 1995 Southern Hyogo Prefecture Earthquake, earthquake-resistant technologies have improved such as introduction of seismic base isolation. The developed cntainer cranes were installed to high earthquake-resistance quays and significantly contribute to maintaining function of container terminal after large earthquakes. Related to seismic performance verification of container cranes, earthquake strong motions have been observed at some container cranes of ports. Strong-motion earthquake records observed at a base-isolated container crane and a underlying wharf during the 2011 off the pacific coast of tohoku earthquake was arranged in detail, in order to clarify the seismic properties of a container crane. Taking account to modeling of base isolation system, a series of dynamic response analyses is condected to reproduce the observed seismic behavior of the crane in this study.
