実建築物の壁面に生じたひび割れ挙動計測に基づくひび割れ補修のための調査診断に関する考察

摘要

This research aims at rationalization of the selecting technique of a crack repair method of construction with the movement occurred in RC structure. The definition of "existence of crack width behavior" of the flow chart in the public organization's specifications for crack repair method selection is so ambiguous. In this research, behavior of the crack produced in the outer wall of an actual building was measured, and new knowledge was able to be acquired about the opening-and-closing pattern and crack width behavior of cracks which were produced in the outer wall of building. Although it was generated in the building of only one building, and the cracks and consideration in this paper are based on this measurement results, it was thought that the results of this paper has the flexibility about the crack investigation for selection of a repair method of construction.%本論文では,現行の各種公的機関の示すひび割れ補修工法選定フローでの重要な要因である「ひび割れ挙動の有無／大小」について,実際の建築物に生じているひび割れ幅の日変動を計測し,ひび割れ幅の挙動に及ぼす要因を検討した.本計測から得られた主要な結果は下記のとおりである.なお,本論文での計測対象は,竣工後約30年が経過した建築物に生じたひび割れであり,以下の結論はコンクリートの乾燥収縮が収束した材齢における乾燥収縮ひび割れ,コールドジョイントに沿うひび割れの計測結果に基づくものである.