EXPERIMENTAL STUDY ON THE RESTORING FORCE CHARACTERISTICS OF TRADITIONAL TIMBER FRAME CONSISTING OF “DAITOHIJIKI” (LARGE BEARING BROCK WITH BRACKET ARMS), “KASIRANUKI” (HEAD TIE-BEAMS), AND THREE CIRCULAR COLUMNS AND ON THE MOMENT-RESISTING PERFORMANCE EVALUATED IN EACH STRUCTURAL ELEMENT

Abstract

To clarify the influence of the head tie-beams on the restoring force of the traditional wooden frame structure, static loading tests were conducted on the model specimens with four different kinds of head tie-beam specifications subjected to the two different stages of dead loads. It was clarified that the existence of the head tie-beam greatly contributed to the performance of the specimens regardless of the specifications of the head tie-beams. Ancient specification head tie-beam showed an eccentric moment-resisting performance depending on the opening angle between column and beam. Other head tie-beams, however, had no opening angle dependency.