2つ割りと3つ割り筋かいを持つ木造住宅の振動台実験: 木造建物の地震時挙動に関する研究　その5

摘要

Timber fiame with braces has been used widely for newly and existing wood buildings in Japm. This paper presents their seismic performance through shaking table tests and characteristics of cyclic loading and ductility to evaluate seismic design value. Timber frame with braces of1/3 of column dimension having Co=0.56 seismic performance almost collapsed during NS cranponent of 1995 JMA Kobe. The frame with braces of1/2 of column dimension having Co=0.69 was survived against repetition of the JMA Kobe and aftershock of 2004 Niigata Chuetu earthquake, but the frame with Co=0.46 was damaged during the 1995 JMA Kobe. Although the seismic wall ratio including influence of ductility behavior was said to ignore extra coefficient of bracing shear wall, it was found that extra shear force is required from the results of equivalent dancing and time history analysis.%以上、住宅規模の筋かいについて振動台実験と壁実験を通じてその耐震性能を検証した。本論文の結論は以下の通りである。4つの指標で評価する現行の壁倍率評価では2つ割り筋かい、3つ割り筋かいとも施行令第46条第4項の壁倍率を満足していなかつた。