高力ボルト接合を用いた方杖付き鋼構造建築架構の骨組解析モデルの構築

概要

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A reinforcing method of existing steel buildings by double-channel knee braces with only high-strength-bolted connections was already studied experimentally. The purpose of this study is to clarify how to model the beam-end and the knee-brace-end bolted connections for frame analyses. To discuss how detailed the connection modeling should be, parametric frame analyses of T-shaped and cruciform plane frames with the knee-braces were conducted, varying connection models (pin joints or semi-rigid ones with non-linear rotational springs). From the analytical results, overall behavior of the frame depends greatly on modeling of beam-end connections, less on modeling of knee-brace-end connections. By the frame analyses of steel buildings whose column members are H-section, it is also shown that the lateral stiffness of the weak-axis column plane frame with the bolt-connected knee-braces can be almost the same as the one of the strong axis column plane frame, if the knee-braces are long enough.
2011-03-25