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Masamichi Saito,Ichiro Sugimoto,Eiichi Sasaki 한국강구조학회 2013 International Journal of Steel Structures Vol.13 No.3
Steel railway bridges which exceed their design lifetime are increasing in Japan, and some of them have problems such as corrosion and fatigue. In this study, we proposed a method to improve the performance, such as the load-carrying capacity, of the existing steel railway bridges by installation of concrete decks. To figure out the applicability of the proposed method, we discussed the applicable range of span and the effect of stress reduction. Considering application into actual bridges, we proposed an installation method using pre-cast concrete decks and girder-deck connection with filler mortar and steel fasteners. Finally, we carried out loading tests of the connection with fasteners and bending tests of the applied girders. As a result, we found that the girder-deck connections have enough static capacity for lateral force and train loads, under the condition that the studs are installed and the gaps between the pre-cast decks are filled with mortar.
Experimental Study on Noise Reduction Effect of Installing Concrete Deck on Existing Steel Girders
Masamichi Saito,Ichiro Sugimoto,Eiichi Sasaki 한국강구조학회 2015 International Journal of Steel Structures Vol.15 No.1
There are a number of existing steel railway bridges which has problems regarding structure-borne noise under train passage. Authors have proposed a performance improvement method of existing steel railway bridges by installing concrete deck. Bythis method, the vibration of the girder and the structure-borne noise are expected to be reduced. Generally, it is known thatconcrete deck can reduce the vibration and the noise. However, the noise reduction effect has not been clarified. In this study,impact hammer tests were carried out to figure out the reduction effect of the concrete deck on the vibration and the noise. Through the test, it was found that the response acceleration of the steel girder web was reduced by installing the concrete deck,as a result of reducing the propagation of on-girder vibration into the steel girder.