円形鋼管を最密充填した耐震改修用耐カ壁の降伏線理論モデル: 円周方向直動機構を付加した簡易なモデルによる大変形解析

摘要

耐震改修に用いる耐カ壁には低振動•低騒音•居ながら施工性が求められる。柱•梁架構内に円形鋼管が最密に充填され、鋼管同士の接点が溶接された耐力壁（Fig.l以下最密壁）は同条件を満たし、2,000kN程度の耐力、厚さ150mmのRC壁並びにH-200×200のブレース補強と同等の性能及び優れた靱性•採光•通風•美観性が期待されている。%Seismic-resistant retrofitting requires low vibration, low noise and good workability without moving out of the inhabitants. These requirments are fulfilled by closest-packed circular steel tube bearing wall and it has maximum lighting, ventilation and ductility. The out-of-plane bending stiffness resists seismic lateral force, concerning the mechanism, no experiment nor study is found in 2017 currently by the author.This paper proposes a large deformation simple analysis model of of yield line theory with circumferential direction linear slider which allows tensile elongation. The calculated relation between deformation and shear force was verified by the experimental result and good corresponance was indicated.