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Study on the Seismic Performance of Container Crane -Development of the Container Crane with Isolation System-

Publication year

Port and Airport Research Institute　Report　042-02-09　2003.06

Author(s)

Takahiro SUGANO,Takahiro SHIBAKUSA,Kiyosi FUJIWARA,Koichi TOKUNAGA,Yoji MAKIMOTO,Tomoyuki FUJIKI

Department
/Divison

Geotechnical and Structural Engineering Department Structural Dynamics Division

Executive Summary

Takahiro SUGANO,Takahiro SHIBAKUSA,Kiyosi FUJIWARA,Koichi TOKUNAGA,Yoji MAKIMOTO,Tomoyuki FUJIKI

The 1995 Hyogoken-Nanbu Earthquake caused extensive damage to the container handling cranes at the container tenninals of Kobe Port. Consequently, the authors developed a seismic isolated container handling crane that could avoid damage and wheel derailment during a strong earthquake, and restart loading and unloading immediately after an earthquake. The authors made an experiment with scale model in order to verify the isolation system effectiveness. The developed container uses the seismic isolation system installed between the gantry truck and the leg. Tne authors used the laminated-rubber seismic isolator as system to make the natural Period of the crane longer and isolate earthquake energy.Laminated-rubber isolators have been widely installed on bridges, buildings and other structures for many years. Tne seismic isolation system consists of the laminated-rubber seismic isolator, besides the damper to absorb to earthquake energy, the moment support rollers to prevent the isolator rotation, the links to prevent the excessive isolator horizontal displacement, and the shear pin to fix the isolation system during operation (i.e. loading and unloading). This paper verifles die seismic isolation system effectiveness by a scale model test, such as the reduction of crane acceleration response and prevention of wheel derailment. Further, this paper shows that the container hung by the rope doesn't have influence on die dynamic behavior of the crane and what some of 4 seismic isolation system units doesn't operate has influence on crane acceleration response and the uplifting of the leg. The analytical data and the experimental data coincide as to the acceleration response and the uplifting of the leg. Nonlinear seismic response analysis is an effective method to simulate the dynamic behavior of the crane with/without isolation system during an earthquake.

PDF File

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