JP-2026075285-A - Structure of the end of a beam with a sleeve near the column-beam joint in a timber frame

Abstract

[Problem] To provide a beam end structure equipped with a sleeve for equipment piping near the column-beam joint of a timber frame. [Solution] Anchor bolts 18a and 18b are inserted and fastened through insertion holes 17a and 17b at the upper and lower ends of the beam 12, with the beam-side flange 16 inserted through them. A sleeve 15 is provided on the beam between the anchor bolt inserted on the upper side and the anchor bolt inserted on the lower side. A high-tensile fiber sheet 19 is wrapped around the end of the beam into which the anchor bolts are inserted, either once or multiple times, and the high-tensile fiber sheet is cut out along the opening of the sleeve. [Selection Diagram] Figure 1-2

Inventors

• 田中 純一
• 谷口 貴昭
• 篠原 誠
• 住田 憲泰
• 藤田 和彦
• 山田 衣菜子
• 江口 司津
• 徳岡 怜美
• 石田 拓也
• 中澤 昭伸
• 小泉 融
• 山崎 和広
• 田上 誠
• 今度 薫

Assignees

• 株式会社市浦ハウジング＆プランニング
• 株式会社織本構造設計
• 東レ建設株式会社

Dates

Publication Date

20260508

Application Date

20241022

Claims (4)

1. A structure for the end of a beam having a sleeve near the joint where a wooden upper column, a lower column, one beam, and the other beam are joined via a steel joint member, Anchor bolts are inserted and fastened through the insertion holes on the upper and lower ends of the beam, passing the beam-side flange through them. The beam between the anchor bolt inserted on the upper side and the anchor bolt inserted on the lower side is provided with the sleeve. A high-tensile fiber sheet is wrapped around the end of the beam into which the anchor bolt is inserted, either once or multiple times. A structure for the end of a beam having a sleeve near a column-beam joint in a timber frame, characterized in that the high-tensile fiber sheet is cut out along the opening of the sleeve.
2. The anchor bolt is inserted into the insertion hole with adhesive in between. The structure of the end of a beam having a sleeve near a column-beam joint of a wooden frame, as described in claim 1, characterized in that a tall nut is provided on the base side of the anchor bolt and a covering portion is formed to prevent direct adhesion to the adhesive.
3. High-tensile fiberboards are attached to the upper and lower ends of the beam. The structure of a beam end having a sleeve near a column-beam joint of a wooden frame according to claim 1, characterized in that the high-tensile fiber sheet is wound in one or multiple layers while covering the high-tensile fiber board.
4. The structure of a beam end having a sleeve near a column-beam joint of a timber frame according to claim 1, characterized in that a shear key is inserted between the anchor bolt inserted on the upper side of the end of the beam and the anchor bolt inserted on the lower side of the end of the beam, with the beam-side flange inserted between them.

Description

This invention relates to a structure for the end of a beam having a sleeve near the column-beam joint of a timber frame. Traditionally, methods for joining wooden columns and beams have included methods using anchor bolts and adhesives, as well as methods using lag screw bolts, tension bolts, etc. Alternatively, a method is known in which a steel joint member is provided at the joint between the wooden column and beam, and the steel joint member is joined to the column and beam using anchor bolts and adhesive. The applicant refers to a joining method using an anchor bolt and an adhesive, in which there are parts where the anchor bolt and adhesive are fixed and parts where they are not, as a "glued-in unbonded anchor (GIUA)" (see Patent Document 1). Furthermore, conventionally, when installing a pipe sleeve in a wooden beam without reinforcement, guidelines have been provided that the location should be within the central one-third of the beam's depth, and the sleeve diameter should be no more than one-quarter of the beam's depth and no more than 150 mm. This guideline is described in "Technical Data on Wooden School Buildings Using JIS A 3301 - March 2015, Ministry of Education, Culture, Sports, Science and Technology" under the section on reduction of beam cross-sectional performance due to the absence of through-holes (see Non-Patent Document 1). Japanese Patent Publication No. 2021-188326 "Technical Data on Wooden School Buildings Using JIS A 3301 - March 2015, Ministry of Education, Culture, Sports, Science and Technology" This is a perspective view illustrating the structure of the end of a beam having a sleeve near the column-beam joint of a timber frame according to the first embodiment of the present invention.This is a perspective view showing a portion of the structure of the end of a beam having a sleeve near the column-beam joint of a timber frame according to the first embodiment of the present invention.This is a perspective view illustrating the structure of the end of a beam having a sleeve near the column-beam joint of a timber frame according to a second embodiment of the present invention.This is a perspective view showing a portion of the structure of the end of a beam having a sleeve near the column-beam joint of a timber frame according to a second embodiment of the present invention.This is a perspective view illustrating the structure of the end of a beam having a sleeve near the column-beam joint of a timber frame according to a third embodiment of the present invention.This is a perspective view illustrating the structure of the end of a beam having a sleeve near the column-beam joint of a timber frame according to a fourth embodiment of the present invention. Next, embodiments of the present invention will be described with reference to the drawings. The present invention relates to a structure for the end of a beam having a sleeve near the column-beam joint of a timber frame, and is a structure that allows a sleeve for equipment piping to be provided at the end of a beam near the column-beam joint of a timber frame without impairing the load-bearing capacity, rigidity, and toughness of the column-beam joint. Note that Figures 1-1 to 4 clearly show the interiors of the columns 11 and beams 12 for ease of understanding. The term "anchor bolt 25" is not limited to this, and specifically includes steel rod-shaped members such as steel bars with rolled threads, PC steel bars, deformed reinforcing bars, etc., that possess the required strength.