Seismic Risk Management for Port Systems
Seismic Performance of Cranes
Recent earthquakes have highlighted the vulnerability of cranes and other material handling equipment to damage resulting from even moderate ground motion. At the Port of Kobe during the 1995 Hyogoken Nanbu earthquake, cranes suffered extensive damage due to local buckling of plates and global buckling of the legs, often leading to collapse. Most of these cranes are unique structures from the design, fabrication and functional standpoints, and replacement for a failed structure can take more than a year. Their continued operation following an earthquake is critical to the operation of the port.
For more information about Seismic Preformance of Cranes project , please, visit this website.
For more information about Seismic Risk Management for Port Systems a NEESRGC project , please, visit this website.
A 1:20 scale model experiment is underway on the shake tables at the NEES equipment site at University at Buffalo. The objective of this test is to lay the groundwork for a larger scale test to be completed in this project. Instrumentation schemes will be tested to evaluate their effectiveness for evaluating important response quantities. Additionally, information will be collected to validate the models of the elastic response and uplift phenomena of the container crane.
The model will be subjected to a suite of ground motions that are representative of the criteria used for the design of port structures. The suite of ground motions consist of two operating level earthquakes, two contingency level earthquakes, and ground motions recorded on a wharf at the Port of Oakland during the Loma Prieta earthquake. Important response quantities include the acceleration and displacement of the boom, uplift and horizontal displacement of the legs, and the stresses around the portal joint.
This project is supported by the George E. Brown, Jr. Network for Earthquake Engineering Simulation program of the National Science Foundation under Grant Nos. CMS-0530478.