ピン接合鋼管ブレースによる腰壁・垂れ壁付きRC造骨組の外付け耐震補強法に関する実験的研究

概要

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A new seismic retrofitting method by using a circular hollow section (CHS) bracing is proposed for existing R/C frames with spandrels. In the proposed method, a reinforcing frame composed of an H-section peripheral frame and pin-ended CHS bracings is placed on the outer surface of an R/C frame and connected to it with mechanical anchors and high strength mortar. Experimental studies were carried out to evaluate the reinforcing effect. A tube-in-tube brace, which is restrained not to buckle by the outer tube, are applied as a reinforcing brace. For comparison, H-section braces are also applied. All the specimens are 1/3-scale models for one story-one bay substructure frame of an R/C building, and the columns are brittle. In the experiment, the horizontal loads were cyclically applied to specimens under a constant vertical load. Through the experimental results and analytical results, effectiveness of the proposed method is discussed. Predicted load-displacement relationships of the reinforced R/C frames are reasonably agreed with the experimental ones.
社団法人日本建築学会の論文
2005-08-30