力の計測に基づく曲げ降伏先行型耐震壁の力学的弱点の抽出とその補強効果

摘要

曲げ降伏先行型のRC造耐震壁を対象に，危険断面における局所rn的な内力を計測することを第一の目的に，基礎の形状をパラメータrnとした2体の耐震壁試験体の静的繰り返し載荷実験を行った。加えrnて，上記より得られる知見に基づき，耐震壁側柱脚部を局所的に補rn強した場合の性能向上効果を検証することを第二の目的に，側柱のrn構造詳細をパラメータとした2体の試験体の実験を行った。本実験rnより得られた知見を以下にまとめる。%This paper describes an experimental study on the seismic performance of reinforced concrete shear walls. A series of structural tests was conducted using several types of shear wall specimens: one normal and three specific specimens. One of specific specimens was designed to measure internal forces on the critical section, which identified a structural weak point in this kind of structure. Based on the result, partial strengthening was applied to other specific specimens. Steel jacketing applied only to the structural weak point significantly improved the seismic performance, in particular ductility, compared to the normal specimen.