Proposition of a New Type of Jointless System For Existing Concrete Bridges  

作　　者：Yuichi Ishikawa Minobu Aoyama Masami Kuroyanagi Masatugu Nagai Takeshi Miyashita 

机构地区：[1]Kanazawa Branch, Central Nippon Highway Engineering Nagoya Co. Ltd., Kanazawa 920-0025, Japan [2]Nagoya Branch, Central Nippon Expressway Co. Ltd., Nagoya 460-0003, Japan [3]Department of Civil and Environmental Engineering, Nagaoka University of Technology, Nagaoka 940-2188, Japan

出　　处：《Journal of Physical Science and Application》2014年第2期84-89,共6页物理科学与应用（英文版）

摘　　要：Since 1990s, the use of deicing salts （i.e., chlorides） has dramatically increased in areas with heavy snowfall in Japan. As a result, the water mixed with salts has accelerated the damage of the reinforced concrete （hereafter, RC） structures. Recently conducted inspection results of RC bridges have reported that many of the damages or deteriorations are observed at the girder ends and abutments This is caused from the water leakage due to the aged expansion joints. In general, the cost for repairing the damaged RC structures is much higher than that for renewing the expansion joints. Therefore, to prevent these damages, we developed a new highly durable jointless system, named RC plug joint, for existing RC bridges with a bridge length less than 40 meters. The RC plug joint connects the abutment＇s backwall to the superstructure＇s deck using reinforcing steel bars and fiber reinforced concrete. The newly developed RC plug joint system can prevent water leakage and allow for a smooth ride of vehicles at the joint. This paper will explore and discuss the development of the RC plug joint, analysis of conducted investigations, and future installation methods.

关 键 词：Jointless system RC plug joint field investigation leakage assessment travelling performance 

分 类 号：TU375[建筑科学—结构工程] U448.34[建筑科学—桥梁与隧道工程]