Abstract
The Kizugawa Bridge on the East Osaka Route of Hanshin Expressway is 5 span continuous steel deck bridge whose interspace piers are rocking pier. Separated two bound girders are connected by lateral steel members. It is popular to adopt menshin seismic retrofitting for rather long bridges. But in this case, pear response displacement had to be controlled in allowable range because of allowable displacement of rocking pier. So special retrofitting methods such as integrated sliding bearing system and deviation protect device for pivot bearing on rocking pier are adopted. Additionally, lateral steel members connecting two girders are reinforced.
