US20050120658A1 - Joint structure of building using thin and lightweight shaped-steel - Google Patents
Joint structure of building using thin and lightweight shaped-steel Download PDFInfo
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- US20050120658A1 US20050120658A1 US11/041,068 US4106805A US2005120658A1 US 20050120658 A1 US20050120658 A1 US 20050120658A1 US 4106805 A US4106805 A US 4106805A US 2005120658 A1 US2005120658 A1 US 2005120658A1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/11—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with non-parallel upper and lower edges, e.g. roof trusses
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
- E04C3/07—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web at least partly of bent or otherwise deformed strip- or sheet-like material
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/14—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate against other dangerous influences, e.g. tornadoes, floods
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2415—Brackets, gussets, joining plates
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2448—Connections between open section profiles
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B2001/2481—Details of wall panels
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B2001/2484—Details of floor panels or slabs
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
- E04C2003/0413—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
- E04C2003/0421—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section comprising one single unitary part
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
- E04C2003/0434—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the open cross-section free of enclosed cavities
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
- E04C2003/0452—H- or I-shaped
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
- E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
- E04C2003/0473—U- or C-shaped
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C2003/0486—Truss like structures composed of separate truss elements
- E04C2003/0491—Truss like structures composed of separate truss elements the truss elements being located in one single surface or in several parallel surfaces
Definitions
- the present invention relates to a joint structure of a building using thin and lightweight shaped-steel, particularly a joint structure of an earthquake-resistant and wind-resistant building made of steel, for fastening a frame member made of thin and lightweight shaped-steel and a steel sill, and a bolt-joint truss structure constituting a main structure of a roof.
- these joints exist in a portion for fastening upper story sills and lower story sills with the frame members, a portion for fastening the frame members with each other, a portion for fastening the frame members with a steel or concrete base, a portion for fastening upper chord members with lower chord members, and a portion for fastening lattice members for joining the upper and lower chord members.
- reinforcing metallic members or joint metallic members are used for the reinforcement.
- the roof structure when a chevron type roof truss formed of shaped-steel members of approximately 1 mm thick is used two upper chord members and one lower chord or lattice member are disposed to form a triangle. They are then temporarily fixed by jigs and connected together in a joint area between the respective chord members by drilling-tapping screws.
- the joint structure between the respective members is that, as shown in FIG. 1 , a frame member 1 constitutes a pillar for the upper story and a frame member 2 constitutes a pillar for the lower story. Ends of these frame members are orthogonally joined to tracks 3 , 4 to define a T-shape. Also, a sill 5 is interposed between the tracks 3 and 4 , and another sill 6 is attached to the sill 5 in the vertical direction. A floor 7 is placed on the sill 6 . On the lateral side of the sill 5 , side wall members 8 are mounted to form a wall.
- the frame members 1 and 2 do not constitute an integral structure passing through the upper and lower stories but constitute an assembled structure, a space exists between both the frame members, for accommodating the sills 5 and 6 .
- the sills 5 and 6 are orthogonally brought into contact and joined with each other at a position directly beneath the frame member 1 and directly above the frame member 2 .
- a steel sheet member 9 formed merely by bending a steel sheet at a right angle is attached thereto with screws or rivets in the prior art.
- the cross-section of the member 9 is as small as at most 50% of the joint area, resulting in a lack of strength.
- a tensile force or a compressive force acts on the frame members to deform the sills 5 and 6 .
- This locally deforms the floor member or the ceiling member to incline the building and deteriorate the living environment.
- a hold-down member 21 is used for securing the frame member to a steel or concrete base 10 .
- This hold-down member 21 is joined to the frame member 2 via a steel back plate 22 by fastener means such as screws.
- This hold-down member 21 includes steel side plates 23 , 24 and a bottom plate 25 disposed between these side plates and attached thereto.
- a bolt hole 26 is provided in the vicinity of a center of the bottom plate 25 , into which a anchor bolt hole of the steel or concrete base 10 is inserted to fasten the anchor bolt and the hold-down member 21 .
- a diameter of the bolt hole provided in the bottom plate 25 is the same as or only slightly larger than that of the anchor bolt in many cases, it is difficult to align the hole provided in advance in the factory in the hold-down member 21 with the anchor bolt hole, whereby the assembly may often be disturbed. Also, as shown in FIG. 2 ( b ), if the bottom plate 21 is provided above the hold-down member 21 , there is a risk in that the hold-down member 21 may be deformed when the anchor bolt is tightly fastened.
- a space larger than a roof truss and having a horizontal plane with a high accuracy is required.
- the roof truss is completed on a ground surface and is raised and transported to a ceiling surface before the installation in the actual assembly.
- the completed roof truss is very large in size and heavy in weight, and therefor is difficult to handle.
- the present invention relates to a joint structure for a building using thin and lightweight shaped-steel members, and particularly to providing a joint structure for an earthquake-resistant and wind-resistant steel building, in which thin and lightweight shaped steel is used as frame members or others, capable of effectively solving the above-mentioned problems. That is, the present invention provides a steel reinforcing member for fastening frame members to steel sills, a joint for fastening sills and frame members forming upper and lower stories, and a steel joint structure for fastening a frame member to a steel or concrete base, which take the reinforcement strength into account with reference to the cross-sectional area of the frame member.
- the present invention provides a bolt joint structure, for a roof truss or others, capable of readily corresponding to the change of the roof inclination, easily forming the truss even if a dimensional error exists, and facilitating the working efficiency due to the improvement in the building construction.
- the present invention is:
- a joint structure of a building using thin and lightweight shaped-steel characterized in that, in a joint portion for fastening a steel frame member for forming a wall to a steel floor sill, a steel reinforcing member having a cross-sectional area in a range from 70 to 100% of a cross-sectional area of the steel frame member is inserted into the joint portion and fixed thereto.
- a joint structure of a building using thin and lightweight shaped-steel characterized in that, in a joint portion for fastening a steel frame member for forming a wall to a steel or concrete base by a bolt, a steel joint plate provided with a bolt through-hole having a diameter 1.5 times that of the bolt or more is inserted into the joint portion and fixed thereto.
- a joint structure of a building using thin and lightweight shaped-steel as defined by claim 2 characterized in that an additional plate with a bolt through-hole having the same diameter as that of the bolt through-hole of the steel joint member or a diameter slightly larger than the bolt diameter is combined with the steel joint member.
- a joint structure of a building using thin and lightweight shaped-steel characterized in that upper chord members, lower chord members and lattice members of thin and lightweight shaped-steel are combined to form a truss structure, wherein a joint portion of the upper chord member, lower chord member and lattice member has at least one joint through-hole, and wherein the joint portions of the respective members are connected together to form a joint and a fastener is inserted into the joint through-hole to fasten and fix the respective members to each other.
- a joint structure of a building using thin and lightweight shaped-steel as defined by claim 4 , characterized in that a joint gusset in which at least one joint through-hole is provided to be aligned with the joint through-holes provided in the upper chord member, lower chord member and lattice member is attached to the joint portion and then the respective members are fastened and fixed together.
- a joint structure of a building using thin and lightweight shaped-steel, as defined by claim 5 characterized in that the gusset is a washer having a thickness of 1 . 6 mm or more.
- FIG. 1 illustrates a joint structure between a vertical frame member and a steel sill in the prior art
- FIG. 2 illustrates a joint structure between a vertical frame member and a base in the prior art
- FIG. 3 illustrates a joint structure between a vertical frame member and a steel sill according to the present invention
- FIG. 4 illustrates a joint structure between a vertical frame member and a base according to the present invention
- FIG. 5 illustrates a joint structure of a truss in a steel building according to the prior art and the present invention.
- FIG. 3 a joint structure according to the present invention, for fastening and joining the respective frame members with each other, is shown.
- a frame member 1 constitutes a pillar for an upper story and a frame member 2 constitutes a pillar for a lower story, and the ends of these frame members are orthogonally joined to tracks 3 and 4 to define a T-shape.
- a sill 5 is disposed to be attached thereto, and another sill 6 is attached to the sill 5 and extends in the vertical direction.
- a floor 7 is placed.
- side wall members 8 are attached.
- a steel member 9 formed by merely bending a flat steel sheet at a right angle is attached to the joint portion in which the sill 6 is brought into contact with the side of the sill . 6 by screws or rivets.
- the steel member 9 has a cross-sectional area as small as at most 50% of the joint area for the purpose of weight reduction it is therefore insufficient in strength.
- a steel reinforcing member 9 ′ having a cross-sectional area the same as or 70% or more of that of the frame member of a rectangular or groove-like shape is inserted and fixed.
- a concrete structure is shown in an enlarged manner in FIG. 3 as indicated by an arrow, in which a rectangular or groove-shaped steel reinforcing member 9 ′ is attached to the joint portion, whereby the joint structure is sufficiently durable against a large earthquake of the 5 th degree or more on the seismic intensity or a typhoon of the wind velocity at 30 m/sec or more.
- the cross-sectional area of the steel reinforcing member 9 ′ exceeds 100% of that of the frame member, the weight becomes too heavy or the joint portion is excessively strong.
- the cross-sectional area of the steel reinforcing member 9 ′ is preferably in a range from 70 to 100% of the cross-sectional area of the frame member.
- the diameter of the bolt through-hole provided in the bottom plate 25 is 1.5 times the bolt diameter or more, for example, when the diameter of the bolt through-hole is 24 mm or more for the bolt diameter of 16 mm, or 28.8 mm or more for the bolt diameter of 19 mm, the error of the building construction will be absorbed. On the contrary, if the diameter of the bolt through-hole is excessively large, the strength is of course unfavorably lowered.
- a truss structure is assembled by joining upper chord members 50 , 51 and opposite ends of a lower chord member 52 with ends of the upper chord members 50 , 51 , each of which members is made of a shaped steel, 2.3 mm thick or less. If necessary, a slanted lattice member 53 is attached thereto. At least one fastener hole 55 is bored in the tip end joining portions of the upper chord member 50 in advance, the lower chord member 52 and the lattice member 53 .
- a gusset 56 preferably a steel member of 1.6 mm thick or more, having at least one fastener hole capable of being joined by a connecting bolt, is located in alignment with a pilot hole provided in advance, and is fastened and fixed to form a truss structure.
- the fastener through-hole in the steel member or the washer has a diameter larger than that of a bolt head in view of the increase in strength.
- the members to be joined are accurately located by only positioning the through-holes, it is possible to facilitate the assembling operation in situ to a great extent. Also, as the members are simply connectable together by a single bolt instead of using several screws in the prior art, the joining operation is significantly improved.
- the present invention is advantageously applicable to a steel house as an earthquake-resistant and wind-resistant building.
- the present invention provides a joint structure for a building using thin and lightweight shaped steel members, particularly a joint structure for fastening frame members and steel sills of a building in which thin and lightweight shaped steel is used as the frame members or others and a joint truss structure which is a main structure of a roof.
- This structure provides a steel building resistant to a large earthquake and a strong wind such as a typhoon. According to the present invention, the workability is also improved to a large extent.
Abstract
The present invention provides a joint structure for a building using thin and lightweight shaped-steel, and, in particular, provides a joint structure for fastening and fixing frame members made of thin and lightweight shaped-steel to steel sills and a bolt joint truss structure for forming a main structure of a roof, sufficiently durable against a large earthquake or a strong wind such as a typhoon. A joint structure of a building using thin and lightweight shaped-steel is provided wherein, in a joint portion for fastening a steel frame member for forming a wall to a steel floor sill, a steel reinforcing member having a cross-sectional area in a range from 70 to 100% of a cross-sectional area of the steel frame member is inserted into the joint portion and fixed thereto. Also, a joint structure of a building using thin and lightweight shaped-steel is provided, wherein upper chord members, lower chord members and lattice members of light and lightweight shaped-steel are combined to form a truss structure, wherein a joint portion of the upper chord member, lower chord member and lattice member has at least one joint through-hole, and wherein the joint portions of the respective members are connected together to form a joint and a fastener is inserted into the joint through-hole to fasten and fix the respective members to each other.
Description
- 1. Field of the Invention
- The present invention relates to a joint structure of a building using thin and lightweight shaped-steel, particularly a joint structure of an earthquake-resistant and wind-resistant building made of steel, for fastening a frame member made of thin and lightweight shaped-steel and a steel sill, and a bolt-joint truss structure constituting a main structure of a roof.
- 2. Description of the Related Art
- Recently, earthquake-resistant and wind-resistant steel building are in demand. These steel buildings are constructed by shaped-steel members obtained by roll-forming a thin steel sheet, of 2.3 mm thickness or less, which members are used as frame members, sills or roof members as they are roll-formed or after being bent, wherein the respective members are fastened together directly or via a reinforcement member by screws to form a building frame. In the prior art, there are a number of joints in steel buildings for fastening and joining the respective members to each other. For example, these joints exist in a portion for fastening upper story sills and lower story sills with the frame members, a portion for fastening the frame members with each other, a portion for fastening the frame members with a steel or concrete base, a portion for fastening upper chord members with lower chord members, and a portion for fastening lattice members for joining the upper and lower chord members. In most of these fastening portions, reinforcing metallic members or joint metallic members are used for the reinforcement. In the roof structure, when a chevron type roof truss formed of shaped-steel members of approximately 1 mm thick is used two upper chord members and one lower chord or lattice member are disposed to form a triangle. They are then temporarily fixed by jigs and connected together in a joint area between the respective chord members by drilling-tapping screws.
- A joint structure for fastening and fixing the above-mentioned members with each other will be described with reference to the prior art joint structure shown in
FIG. 1 . - First, in a portion for fastening the sill with the frame member, the joint structure between the respective members is that, as shown in
FIG. 1 , aframe member 1 constitutes a pillar for the upper story and aframe member 2 constitutes a pillar for the lower story. Ends of these frame members are orthogonally joined totracks sill 5 is interposed between thetracks sill 6 is attached to thesill 5 in the vertical direction. Afloor 7 is placed on thesill 6. On the lateral side of thesill 5,side wall members 8 are mounted to form a wall. - As the
frame members sills sills frame member 1 and directly above theframe member 2. As the joint in this contacting portion naturally requires reinforcement, asteel sheet member 9 formed merely by bending a steel sheet at a right angle is attached thereto with screws or rivets in the prior art. - However, for the purpose of weight reduction, the cross-section of the
member 9 is as small as at most 50% of the joint area, resulting in a lack of strength. Particularly, when a large earthquake occurs or a strong wind blows, a considerable force is applied to the building, whereby a tensile force or a compressive force acts on the frame members to deform thesills - On the other hand, as shown in FIGS. 2(a) and 2(b), a hold-down
member 21 is used for securing the frame member to a steel orconcrete base 10. This hold-downmember 21 is joined to theframe member 2 via asteel back plate 22 by fastener means such as screws. This hold-downmember 21 includessteel side plates bottom plate 25 disposed between these side plates and attached thereto. Abolt hole 26 is provided in the vicinity of a center of thebottom plate 25, into which a anchor bolt hole of the steel orconcrete base 10 is inserted to fasten the anchor bolt and the hold-downmember 21. Since a diameter of the bolt hole provided in thebottom plate 25 is the same as or only slightly larger than that of the anchor bolt in many cases, it is difficult to align the hole provided in advance in the factory in the hold-downmember 21 with the anchor bolt hole, whereby the assembly may often be disturbed. Also, as shown inFIG. 2 (b), if thebottom plate 21 is provided above the hold-downmember 21, there is a risk in that the hold-downmember 21 may be deformed when the anchor bolt is tightly fastened. - Next, a joint for a roof structure will be described. In the prior art roof structure, as shown in
FIG. 5 (a),upper chord members lower chord member 52 are connected to each other at the ends of the upper chord members to define a chevron shape. After attaching alattice member 53, disposed in a slanted manner if necessary, the chord members are temporarily fixed by a jig, and the joints between the respective chord members are joined together by drilling-tappingscrews 54. In this roof structure, a jig is necessary for temporarily fixing theupper chord members lattice member 53. To install the jig and the respective chord members, a space larger than a roof truss and having a horizontal plane with a high accuracy is required. As it is difficult to obtain such a space in situ, the roof truss is completed on a ground surface and is raised and transported to a ceiling surface before the installation in the actual assembly. However, the completed roof truss is very large in size and heavy in weight, and therefor is difficult to handle. - Also there are a number of other problems. For example, it is necessary to fasten the
upper chord members - The present invention relates to a joint structure for a building using thin and lightweight shaped-steel members, and particularly to providing a joint structure for an earthquake-resistant and wind-resistant steel building, in which thin and lightweight shaped steel is used as frame members or others, capable of effectively solving the above-mentioned problems. That is, the present invention provides a steel reinforcing member for fastening frame members to steel sills, a joint for fastening sills and frame members forming upper and lower stories, and a steel joint structure for fastening a frame member to a steel or concrete base, which take the reinforcement strength into account with reference to the cross-sectional area of the frame member.
- Further, the present invention provides a bolt joint structure, for a roof truss or others, capable of readily corresponding to the change of the roof inclination, easily forming the truss even if a dimensional error exists, and facilitating the working efficiency due to the improvement in the building construction.
- To achieve the above object, the present invention is:
- 1. A joint structure of a building using thin and lightweight shaped-steel, characterized in that, in a joint portion for fastening a steel frame member for forming a wall to a steel floor sill, a steel reinforcing member having a cross-sectional area in a range from 70 to 100% of a cross-sectional area of the steel frame member is inserted into the joint portion and fixed thereto.
- 2. A joint structure of a building using thin and lightweight shaped-steel, characterized in that, in a joint portion for fastening a steel frame member for forming a wall to a steel or concrete base by a bolt, a steel joint plate provided with a bolt through-hole having a diameter 1.5 times that of the bolt or more is inserted into the joint portion and fixed thereto.
- 3. A joint structure of a building using thin and lightweight shaped-steel as defined by
claim 2, characterized in that an additional plate with a bolt through-hole having the same diameter as that of the bolt through-hole of the steel joint member or a diameter slightly larger than the bolt diameter is combined with the steel joint member. - 4. A joint structure of a building using thin and lightweight shaped-steel, characterized in that upper chord members, lower chord members and lattice members of thin and lightweight shaped-steel are combined to form a truss structure, wherein a joint portion of the upper chord member, lower chord member and lattice member has at least one joint through-hole, and wherein the joint portions of the respective members are connected together to form a joint and a fastener is inserted into the joint through-hole to fasten and fix the respective members to each other.
- 5. A joint structure of a building using thin and lightweight shaped-steel, as defined by
claim 4, characterized in that a joint gusset in which at least one joint through-hole is provided to be aligned with the joint through-holes provided in the upper chord member, lower chord member and lattice member is attached to the joint portion and then the respective members are fastened and fixed together. - 6. A joint structure of a building using thin and lightweight shaped-steel, as defined by
claim 5, characterized in that the gusset is a washer having a thickness of 1.6 mm or more. - 7. A steel house made of thin and lightweight shaped-steel, using the joint structure as defined by any one of
claims 1 to 6. -
FIG. 1 illustrates a joint structure between a vertical frame member and a steel sill in the prior art; -
FIG. 2 illustrates a joint structure between a vertical frame member and a base in the prior art; -
FIG. 3 illustrates a joint structure between a vertical frame member and a steel sill according to the present invention; -
FIG. 4 illustrates a joint structure between a vertical frame member and a base according to the present invention and -
FIG. 5 illustrates a joint structure of a truss in a steel building according to the prior art and the present invention. - An embodiment of the present invention will be described below with reference to the drawings.
- In
FIG. 3 , a joint structure according to the present invention, for fastening and joining the respective frame members with each other, is shown. In the drawing, aframe member 1 constitutes a pillar for an upper story and aframe member 2 constitutes a pillar for a lower story, and the ends of these frame members are orthogonally joined totracks tracks sill 5 is disposed to be attached thereto, and anothersill 6 is attached to thesill 5 and extends in the vertical direction. Directly above thissill 6, afloor 7 is placed. On the opposite sides of thesill 5,side wall members 8 are attached. Since theframe members sills sills frame member 1 and directly above theframe member 2. This structure is the same as that shown inFIG. 1 . - The large difference from the prior art shown in
FIG. 1 is as follows. In the prior art structure, asteel member 9 formed by merely bending a flat steel sheet at a right angle is attached to the joint portion in which thesill 6 is brought into contact with the side of the sill .6 by screws or rivets. As thesteel member 9 has a cross-sectional area as small as at most 50% of the joint area for the purpose of weight reduction it is therefore insufficient in strength. Particularly, when a large earthquake occurs or a strong wind blows, a considerable force is applied to the building structure and this generates a tensile force or a compressive force in the vertical frame member to deform thesills - To avoid such a deficiency, according to the reinforced joint structure of the present invention, a
steel reinforcing member 9′ having a cross-sectional area the same as or 70% or more of that of the frame member of a rectangular or groove-like shape is inserted and fixed. A concrete structure is shown in an enlarged manner inFIG. 3 as indicated by an arrow, in which a rectangular or groove-shapedsteel reinforcing member 9′ is attached to the joint portion, whereby the joint structure is sufficiently durable against a large earthquake of the 5th degree or more on the seismic intensity or a typhoon of the wind velocity at 30 m/sec or more. However, if the cross-sectional area of thesteel reinforcing member 9′ exceeds 100% of that of the frame member, the weight becomes too heavy or the joint portion is excessively strong. Thus, the cross-sectional area of thesteel reinforcing member 9′ is preferably in a range from 70 to 100% of the cross-sectional area of the frame member. On the other hand, when the steel building of the present invention is fixed to the steel orconcrete base 10, as shown inFIG. 4 , thebottom plate 25 constituting the joint portion for fastening theframe member 2 to the steel orconcrete base 10 is provided with a bolt through-hole 27 having a diameter 1.5 times a bolt diameter or more. Also, another bolt through-hole 29 having the same diameter as the bolt is provided in anadditional plate 28. In this regard, when the diameter of the bolt through-hole provided in thebottom plate 25 is 1.5 times the bolt diameter or more, for example, when the diameter of the bolt through-hole is 24 mm or more for the bolt diameter of 16 mm, or 28.8 mm or more for the bolt diameter of 19 mm, the error of the building construction will be absorbed. On the contrary, if the diameter of the bolt through-hole is excessively large, the strength is of course unfavorably lowered. - As shown in
FIG. 5 (b), according to the roof structure of the present invention, a truss structure is assembled by joiningupper chord members lower chord member 52 with ends of theupper chord members slanted lattice member 53 is attached thereto. At least onefastener hole 55 is bored in the tip end joining portions of theupper chord member 50 in advance, thelower chord member 52 and thelattice member 53. The joint portions of the respective members are stacked on each other to form a connectingjoint portion 56, andfasteners 57 such as connecting bolts are inserted into the fastener holes 55 to fasten and join the respective members. Thus, the truss structure is obtained. Further, in the joint portion of theupper chord members lower chord member 52 and thelattice member 53, agusset 56, preferably a steel member of 1.6 mm thick or more, having at least one fastener hole capable of being joined by a connecting bolt, is located in alignment with a pilot hole provided in advance, and is fastened and fixed to form a truss structure. In this regard, the fastener through-hole in the steel member or the washer has a diameter larger than that of a bolt head in view of the increase in strength. - According to the roof structure for the building of the present invention described above, as the members to be joined are accurately located by only positioning the through-holes, it is possible to facilitate the assembling operation in situ to a great extent. Also, as the members are simply connectable together by a single bolt instead of using several screws in the prior art, the joining operation is significantly improved.
- The present invention is advantageously applicable to a steel house as an earthquake-resistant and wind-resistant building.
- As described hereinabove, the present invention provides a joint structure for a building using thin and lightweight shaped steel members, particularly a joint structure for fastening frame members and steel sills of a building in which thin and lightweight shaped steel is used as the frame members or others and a joint truss structure which is a main structure of a roof. This structure provides a steel building resistant to a large earthquake and a strong wind such as a typhoon. According to the present invention, the workability is also improved to a large extent.
Claims (3)
1. A joint structure of a building using thin and lightweight shaped-steel, characterized in that, in a joint portion for fastening a steel frame member for forming a wall to a steel floor sill, a steel reinforcing member having a cross-sectional area in a range from 70 to 100% of a cross-sectional area of the steel frame member is inserted into the joint portion and fixed thereto.
2-7. (canceled)
8. A joint structure for a building using thin and light-weight shaped-steel comprising:
a joint structure for fastening a steel frame member to a first and second steel floor sill comprises a joint portion fastening said first steel floor sill to said second steel floor sill, and
further comprises a joint portion fastening a steel frame member for forming a wall to a steel or concrete base by a bolt, and
a steel joint plate provided with a bolt through-hole having a diameter 1.5 times that of the bolt or more is inserted into the joint portion and fixed,
wherein said joint portion includes a steel reinforcing member having a cross-sectional area in a range from 70% to 100% of a cross-sectional area of the steel frame member inserted into the joint portion and fixed thereto.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/041,068 US20050120658A1 (en) | 2002-05-20 | 2005-01-21 | Joint structure of building using thin and lightweight shaped-steel |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/151,660 US20030213194A1 (en) | 2000-05-25 | 2002-05-20 | Joint structure of building using thin and lightweight shaped-steel |
US11/041,068 US20050120658A1 (en) | 2002-05-20 | 2005-01-21 | Joint structure of building using thin and lightweight shaped-steel |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/151,660 Continuation US20030213194A1 (en) | 1971-01-01 | 2002-05-20 | Joint structure of building using thin and lightweight shaped-steel |
Publications (1)
Publication Number | Publication Date |
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US20050120658A1 true US20050120658A1 (en) | 2005-06-09 |
Family
ID=34632457
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/041,068 Abandoned US20050120658A1 (en) | 2002-05-20 | 2005-01-21 | Joint structure of building using thin and lightweight shaped-steel |
Country Status (1)
Country | Link |
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US (1) | US20050120658A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5289665A (en) * | 1991-09-26 | 1994-03-01 | Higgins Gregory J | Orthogonal framework for modular building systems |
US5625995A (en) * | 1994-07-15 | 1997-05-06 | Consolidated Systems, Inc. | Method and flooring system with aligning bracket for mutually securing a header, a joist and a base |
US5715642A (en) * | 1995-08-16 | 1998-02-10 | Steel Framing Supply | Steel-frame system and member |
-
2005
- 2005-01-21 US US11/041,068 patent/US20050120658A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5289665A (en) * | 1991-09-26 | 1994-03-01 | Higgins Gregory J | Orthogonal framework for modular building systems |
US5625995A (en) * | 1994-07-15 | 1997-05-06 | Consolidated Systems, Inc. | Method and flooring system with aligning bracket for mutually securing a header, a joist and a base |
US5715642A (en) * | 1995-08-16 | 1998-02-10 | Steel Framing Supply | Steel-frame system and member |
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