JP-7854816-B2 - Wood-steel composite members and methods for manufacturing wood-steel composite members

JP7854816B2JP 7854816 B2JP7854816 B2JP 7854816B2JP-7854816-B2

Inventors

ペクヘス
中島裕貴
松本悠実
池田将和
町田健一
長島泰介
丸谷周平

Assignees

住友林業株式会社

Dates

Publication Date: 20260507
Application Date: 20220205

Claims (5)

A wooden member with a solid cross-section, Multiple steel members are provided along the axial direction of the wood member and are distributed around the outer circumference of the wood member, and are combined with the wood member. The wood member and the steel member are fitted with end members that are attached to both ends of the wood member and the steel member, and are capable of transmitting axial force to both the wood member and the steel member. The aforementioned wooden member has grooves formed in the axial direction. A part or all of the cross-section of the steel member is fitted into the groove. The end member comprises a first steel plate that abuts against the end face of the wood member, a second steel plate that is spaced parallel to the first steel plate and arranged at a distance from it, and a connecting member that joins the first steel plate and the second steel plate. The wood-steel composite member is characterized in that the steel member extends from a position along the wood member, through a notch or opening provided in the first steel plate, and is joined to the second steel plate or the connecting member by welding or bolts.
A wooden member with a solid cross-section, Multiple steel members are provided along the axial direction of the wood member and are distributed around the outer circumference of the wood member, and are combined with the wood member. The wood member and the steel member are fitted with end members that are attached to both ends of the wood member and the steel member, and are capable of transmitting axial force to both the wood member and the steel member. The aforementioned wooden member has grooves formed in the axial direction. A part or all of the cross-section of the steel member is fitted into the groove. The end member comprises a first steel plate that abuts against the end face of the wood member, a second steel plate that is spaced parallel to the first steel plate and arranged at a distance from it, and a connecting member that joins the first steel plate and the second steel plate. The wood-steel composite member is characterized in that the end face of the steel member abuts against the first steel plate and is joined to the first steel plate by bolts that penetrate the first steel plate.
The aforementioned end member is pressed against the end face of the wood member, A compressive force is introduced in the axial direction of the wooden member. The steel member is joined to the end member with tensile force applied to it. The wood-steel composite member according to claim 1 or 2, characterized in that the joining of the steel member and the end member is such that the tensile force acting on the steel member is reduced by a compressive force acting on the end member, and a compressive force is introduced after the tensile force has disappeared.
A process of cutting multiple grooves in the axial direction into the outer circumference of a solid cross-sectional wooden member, The process of fitting a steel member continuous with the axial direction of the wooden member into the groove, The process involves bringing end members into contact with both end faces of the aforementioned wooden member, and introducing an axial compressive force to the wooden member through the end members. A step of joining the end member and the steel member in such a way that both axial tensile and compressive forces can be transmitted from the end member to the steel member, while a compressive force is applied to the wood member and no axial force is acting on the steel member. A method for manufacturing a wood-steel composite member, characterized by including a step of applying a force to the end member of the material and removing the force that has introduced a compressive force to the wood member.
A process of cutting multiple grooves in the axial direction into the outer circumference of a solid cross-sectional wooden member, The process of fitting a steel member continuous with the axial direction of the wooden member into the groove, The process involves bringing end members into contact with both end faces of the aforementioned wooden member, and introducing an axial compressive force to the wooden member through the end members. The process includes joining the end member and the steel member in such a way that both axial tensile and compressive forces can be transmitted from the end member to the steel member, while a compressive force is applied to the wood member. The process of introducing compressive force to the wood member involves applying a reaction force to the wood member via the end member and tensing the steel member. A method for manufacturing a wood-steel composite member, characterized in that the step of joining the wood end member and the steel member is performed in a state in which a compressive force is introduced to the wood member by the reaction force caused by tensing the steel member.

Description

This invention relates to a structural member for use in buildings and the like, a wood-steel composite member that combines a wood member and a steel member, and supports loads mainly in the axial direction by both members. To effectively utilize forest resources, attempts are being made to construct medium- and large-scale buildings, as well as mid-rise and high-rise buildings, using wood. However, in mid-rise and high-rise buildings, large axial forces act on columns and other structural elements, and attempting to support these large axial forces with wooden members tends to result in excessively large cross-sections. Therefore, for example, Patent Documents 1, 2, and 3 propose combining wooden members with steel members to create composite members. Patent Document 1 proposes a composite column in which a steel member having an H-shaped cross-section is surrounded by a wooden member, and a composite column in which a steel member with a cross-shaped cross-section formed by combining H-shaped steels is surrounded by a wooden member. Patent Document 2 also proposes a composite column in which a square steel pipe is surrounded by a wooden member. Patent Document 3 discloses a column in which a steel member is attached around the perimeter of a rectangular wooden member. Japanese Patent Publication No. 2013-130021Japanese Patent Publication No. 2017-89329Japanese Patent Publication No. 2020-122323 These are a side view, an enlarged plan view, and an enlarged cross-sectional view of a wood-steel composite member, which is one embodiment of the present invention.Figure 1 is a perspective view showing the structure of the end portion of the wood-steel composite member.Figure 1 is an assembly diagram of the wood-steel composite member shown.This is a schematic diagram illustrating a means to prevent buckling of the steel member of the wood-steel composite member shown in Figure 1.This is a schematic cross-sectional view showing another example of a means to prevent buckling of the steel member of the wood-steel composite member shown in Figure 1.This is a schematic diagram showing a method of joining a steel member to a wood end member in a wood-steel composite member, with compressive force applied to the wood member.This diagram illustrates the axial load-bearing capacity of a wood-steel composite member in which compressive force is applied to the wood member and tensile force is applied to the steel member.This is a schematic side view showing a joint structure between a steel member and a wood end member of a wood-steel composite member, which is another embodiment of the present invention.This is a cross-sectional view showing another embodiment of the present invention, an example of a wood-steel composite member in which the cross-sectional shape of the steel member has been changed. Hereinafter, embodiments of the present invention will be described with reference to the drawings. Figure 1 shows a side view, an enlarged plan view, and an enlarged cross-sectional view of a wood-steel composite member, which is one embodiment of the present invention and is used as a column. Figure 2 is a perspective view from below showing the upper end of this wood-steel composite column. Figure 3 is a schematic perspective view showing how the wood member, steel member, and end plate (end member) of the same wood-steel composite column are joined together. This wood-steel composite column is primarily composed of a solid wooden member 1 with a nearly square cross-section, multiple steel members 2 fitted into axial grooves 11 formed on the side surface of the wooden member 1, and end plates 3 joined to both ends of the wooden member 1 and the steel members 2, enabling the transmission of axial forces to both the wooden member 1 and the steel members 2. The wooden member 1 is made of laminated timber, which is formed by bonding together multiple pieces of wood with small cross-sections, and is capable of bearing axial forces as part of the structure. Alternatively, it may be made from single pieces of wood cut from logs. Approximately in the center of each of the four sides of the wooden member 1, an axial groove 11 is formed along its entire length. This groove 11 corresponds to the cross-sectional shape of the steel member 2 and is formed so that the steel member 2 can be fitted into it snugly. The steel member 2 can be made of structural steel and is cut into strips from a steel plate. The steel member 2 is fitted into the four grooves formed in the wood member 1 such that the narrower side surface, i.e., the surface in the thickness direction of the steel plate, is parallel to the side surface of the wood member 1, and the wider side surface is in the depth direction of the groove 11 formed in the wood member 1. The narrower side surface of the steel member 2 is almost flush with the side surface of the wood member 1. The steel member 2 is longer than the wooden member 1 and protrudes from the end face of the wooden