スチフナ付RBS梁を有する立体剛接鋼骨組の地震時挙動解析

摘要

This paper presents a numerical study on dynamic behavior of spatial rigid frame with RBS (Reduced Beam Section) beams under earthquakes. Numerical results about a frame with normal beams are also shown for comparison. The torsional angle of RBS beam is several times that of normal beam, but the maximum sway displacement of RBS frame is almost the same as that of normal frame. The numerical results of RBS frames show that absorbed energy concentrates in RBS portion, and that is very small in beam end. It is confirmed that the effect of RBS to reduce stress of a beam end is satisfied.%1994年の米国ノースリッジ地震，1995年の兵庫県南部地震において，鋼構造建築物は甚大な被害を受けた．これらの地震を契機に，耐震安全性を向上させるための研究が数多く行われている．特に被害が大きかった柱梁接合部に関しては，日米ともに精力的に研究が行われた．