EXPERIMENTAL AND ANALYTICAL STUDY ON ESTIMATION OF REACTION FORCE BY STRAIN MEASUREMENT OF STEEL GIRDER

Abstract

If a severe earthquake strike a steel bridge bearing, and the bridge loses its function, it is necessary to restore the function of the bridge as soon as possible. However, in the 2016 Kumamoto Earthquakes, strong earthquakes occurred continuously in a short period, so it is desirable to adopt a reinforcement structure that appropriately reflects the measured stress of the bridge, even for emergency repair reinforcement. In this study, we investigated a method for estimating the fulcrum reaction force with high accuracy by measuring the change in external force during temporary receiving jack-up with a strain gauge by a test using a reduced model of a steel girder.