Development of wood frame structure using mild-press-joint and proposal of performance evaluation method

2018 Fiscal Year Final Research Report

• Project/Area Number: 15H04076
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Building structures/Materials
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: SAKATA HIROYASU 東京工業大学, 環境・社会理工学院, 教授 (80205749)
• Co-Investigator(Kenkyū-buntansha): 山崎 義弘 東京工業大学, 環境・社会理工学院, 助教 (70644425)
• Project Period (FY): 2015-04-01 – 2019-03-31
• Keywords: 圧着関節工法 / プレストレス / 直交異方性 / 木質構造 / クリープ

Outline of Final Research Achievements

The applicant has studied the damage controlled structure using the prestressed concrete mild-press-joint and the passively controlled timber structure in the past. The purpose of this study is to realize the damage control structure that applied the mild-press-joint to the timber structure by utilizing these research results. First, we clarified the efficient stiffening of timber with screws and LSB, the creep behavior of timber against compressive force, and the side compression behavior of glulam timber in the direction perpendicular to the grain. Based on the results, the details of the mild-press-joint were determined, and the partial frame experiment of vertical, L and cruciform, and the entire frame experiment of two layers and two spans were conducted.
As a result, even when the mild-press-joint was applied to the timber structure, it was confirmed that the residual deformation was extremely small and that it had self-centering performance.

Free Research Field

建築構造

Academic Significance and Societal Importance of the Research Achievements

本研究で対象としている損傷制御構造は、大地震が頻発している昨今において、大地震経験後も建物を無損傷に留め、建物の継続的な使用を可能にすることから社会的に強く求められている。一方で、木質構造は環境負荷が小さくCO2の削減に寄与することから、建設需要が社会的に高まっている。
これらを踏まえると、本研究は木質構造物に圧着関節工法を具現化し、それを適用した損傷制御構造の力学的挙動を把握し、その有効性を明らかにしている点で、学術的のみならず社会的にも意義のある研究成果を得たといえる。