GB2250563A - Connection between a pillar and a beam - Google Patents
Connection between a pillar and a beam Download PDFInfo
- Publication number
- GB2250563A GB2250563A GB9026489A GB9026489A GB2250563A GB 2250563 A GB2250563 A GB 2250563A GB 9026489 A GB9026489 A GB 9026489A GB 9026489 A GB9026489 A GB 9026489A GB 2250563 A GB2250563 A GB 2250563A
- Authority
- GB
- United Kingdom
- Prior art keywords
- flange
- pillar
- band plate
- steel
- connection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
-
- 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
-
- 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
-
- 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
- E04B2001/2418—Details of bolting
-
- 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
- E04B2001/2445—Load-supporting elements with reinforcement at the connection point other than the connector
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
In a connection between a structural steel pillar 1 and a structural steel beam 2, a band plate (3) extends between neighbouring flanges (1b) of the steel pillar. A metal connector (4) has one end joining the flange of the pillar (1) and the band plate (3) and its other end bolted to a flange of the beam. The band plate extends vertically and so improves the charging of concrete 8 into the pillar. <IMAGE>
Description
STRUCTURE FOR A CONNECTION BETWEEN A PILLAR
AND A BEAM
The present invention relates to a structure for a connection between a pillar and a beam in the frame of a complex structure of steel, or a steel framed reinforced concrete structure, or a steel frame with reinforced concrete pillars.
There are two representative methods for connecting the steel beams to the steel pillars, both of which form the frame of a steel structure or a steel framed reinforced concrete struture. One method is by welding either the steel structure beams direct to flanges of the steel structure pillars or the brackets by bolting the steel structure beams at work places. The other is by connecting split T-shaped metal or end plates, which are connected to flanges of the steel pillars or end portions of the steel structure beams, to the opposite side with bolts at work places. Most recently, there is a tendency to form connections only by bolting to remove the trouble of welding operations. In addition, instead of using the preceding split T-shaped metal, connection structures using specific metal connectors or the like have been utilized very frequently.
The metal connector for connecting the steel pillar to the steel beam thereby has basically a shape having a bi-directional connecting plate portion like the split
T-shaped metal or the like, and is connected to the flanges of the steel structure beam and pillar to play a role in transmitting tensile force and compressive force between the beam and the pillar. As it is necessary to ensure the stress transmission and to prevent local deformation of the flanges for the steel structure pillar which have a poor out-of-plane rigidity, some horizontal reinforcing bars such as diaphragms are added at the flange level position of the steel structure beam at the side of the steel structure pillar.
As this diaphragm and a horizontal stiffener are connected perpendicularly to the flange surface, their reinforcing effect is large. However, they close the horizontal section of the pillar, and therefore, present a problem with respect to charging concrete in reinforced concrete structures.
In particular, recently in multi-story structures, the pillars are often constructed with a complex structure consisting of steel structure and concrete in order to increase the strength of the pillars. Therefore, it is desirable that the reinforcing bars should have a shape that does not hinder the charging characteristics of the concrete on site.
This problem of concrete charging is solved by replacing the horizontal stiffener with a vertical stiffener.
However, a conventional vertical stiffener is placed between the end surfaces of its neighbouring flanges, for example, in the case of steel structure pillars having a cross-shaped cross-section, such a conventional vertical stiffener is welded while it is taken face to face with their surfaces. Therefore, this vertical stiffener is hard to connect to the steel structure pillars, and the resulting reinforcing rigidity is less effective.
The present invention aims to provide a structure for the connection portions which reinforces the flanges of the steel pillars without impairing the charging characteristics of concrete, while allowing connection of the steel structure pillars to the steel structure beams by means of bolts.
The problem of the charging characteristics of the concrete is solved by disposing vertically the surfaces of band plates between neighbouring flanges around each steel structure pillar, as in the case of the preceding vertical stiffeners. At the same time, the flanges of each steel structure pillar are effectively reinforced by internally contacting both sides of their surfaces with the flanges and by simultaneously connecting one side of a metal connector, which is placed between each steel structure pillar and each steel structure beam, to the overlapping band plate and the flange.
The band plate has the effect of increasing the band plate thickness and the rigidity of the flange and preventing local deformation of the band plate by internally contacting the band plate with the flange.
At the s-ame time, when concrete is charged into the internal portion of the steel structure pillar, the band plate works to make the concrete share the tensile force from the metal connector as a bearing pressure by surrounding the concrete.
The tensile force, which is transmitted from the steel structure beams by way of the metal connectors to the flanges of the steel structure pillars, and a portion of a compressive pressure, are both transmitted to the neighbouring flanges by way of the band plate and furthermore to the side facing the steel structure pillars, and the stress is dispersed into and transmitted to the flanges of the steel structure pillars and a web.
The band plates are disposed by overlapping on the back side of the flanges of the steel structure pillars and installed on the flanges only by bolts which connect the metal connectors to the steel structure pillars, resulting in simplification of the connection portions and making their connection easier. In addition, the band plates can be preliminarily welded to the flanges when the steel structure pillars are prepared.
The metal connector connects the steel structure beam to the steel structure pillar by bolting to connect one end of the metal connector to the flange of the steel structure beam and the other end to the flange of the steel structure pillar and to the band plate at the same time.
As for such a metal connector, for example, hardware such as a strap bolt is used and it consists of both a plain plate portion having a plurality of bolt holes and overlapping the flange of the steel structure beam to be connected to the flange by bolts, and a threaded bolt portion continued to and connected to the plain plate portion through the flange of the steel structure pillar. Otherwise, a split T-shaped metal connector is used and it has a T-shape cross-section obtained by a web overlapping the flange of the steel structure beam and connected to the flange by bolts, and another flange overlapping on the flange of the steel structure pillar and connected to this flange by bolts.
In case of the preceding metal connectors, they have an effect which is equivalent to that of the bolts in case of connecting directly the bolting portion to the flange of the steel structure pillar and the band plate.
In the case of a steel framed reinforced concrete construction, compressive pressure is shared by charging concrete at least within the band plate and by being restricted with the band plate surrounding the concrete at the connection portion.
Other objects, features and advantages of the present invention will become apparent from the following description by way of example, of preferred embodiments of the invention with reference to the accompanying drawings, in which:
Figs. 1 and 2 are a plan view and an elevation view showing a preferred embodiment of the present invention, respectively;
Figs. 3 and 4 are a plan view and an elevation view showing another preferred embodiment of the present invention, respectively;
Figs 5 and 6 are a plan view an an elevation view showing a further preferred embodiment of the present invention, respectively;
Figs. 7 and 8 are a plan view and an elevation view showing a still further preferred embodiment, respectively; and
Fig. 9 is an elevation view showing a split T-shaped metal connector as a connection hardware for a preferred embodiment of the present invention.
For simplication, the illustrated embodiments of the present invention show a single structural steel beam 2 connected to a structural steel pillar 1, regardless of the numbers of beams 2 connected to the pillar 1 in practice.
The present invention is characterised by connecting the steel pillar 1 to the steel beam 2 using a metal connector 4 installed between the steel pillar 1 and the steel beam 2 by means of a band plate 3 which is vertically disposed along a flange 1b of the steel pillar 1 while reinforcing the flange lb,in the frame of a complex structure of steel, of steel framed reinforced concrete structure, or a steel framed reinforced concrete structure only for the pillars.
Fig. 1 shows a preferred embodiment of the present invention when the structural steel pillar 1 has a cross-shaped cross-section by forming the flange ib at the top of a web is assembled in a crossing shape.
Furthermore, the sectional shapes of the steel pillar 1 are determined according to the number of the steel beams connected to the steel pillar, as shown in Figs. 5 and 7.
The band plate 3 follows the sectional shape of the steel structure pillar 1, as shown in Fig. 1. For instance, an octagonal annular material is divided into plain flanges 1b in a number corresponding to those between the flanges. A plate 3 contacts with the inside of the flanges ib of the steel pillar 1 and is disposed between the neighbouring flanges 1b to reinforce the flanges 1b and at the same time to provide backing when welding bolts. This band plate 3 is disposed at the position of the respective flanges 2b above and below the steel beam 2, as shown in Fig. 2. In addition, the band plate 3 is premliminarily attached in the required position on each flange of the steel pillar 1 by welding, depending on its operative characteristics at work places and the needs.
As the preferred embodiment shown in Figs. 1 and 2, when the steel pillar 1 has a cross-shape, each band plate 3 has either a hexagonal or a quarterly-divided shape, and four band plates are disposed at one level.
Each band plate 3 increases its rigidity by contacting the flanges 1b and plays its role in transferring the stresss transmitted from the metal connector 4 to the side of the neighbouring flanges 1b by in-plane force, while preventing local deformation due to such stress.
The metal connector 4 shown in Figs. 1 and 2 is in the form of a strap bolt consisting of both a planar plate portion 4a having a plurality of bolt holes and overlapping the flange of the steel beam to be bolted to the flange, and a threaded bolt portion 4b contiguous with and connected to the planar plate portion through a surface perpendicular to the plain plate portion 4a, and the portions 4b are connected to the flanges 2b of the steel beam 2 by bolts 5 in the plain plate portion 4a as illustrated in the figures. The bolt portion 4b passes through the flange 1b and the band plate 3 at the same time, and they are directly connected together by tightening nuts 6 from both sides to transmit tensile force and compressive pressure between the pillar and the beam.
The metal connector 4 in this shape has a condition equivalent to that connected with bolts by connecting the bolting portion 4b directly to the flange Ib of the steel structure pillar 1, and one set each sheet of the flange ib consists of a pair of both sides holding the web la.
The web 2a of the steel beam 2 is connected by bolts 5 to a gusset plate 7 which is connected by bolts 5 to the outside of the flange ib of the steel pillar 1 as shown in Fig. 2, and the shear force is transmitted by this gusset plate 7.
In the illustrated embodiments, as well as that shown in
Figs. 1 and 2, concrete 8 is charged only into the inside portion of the band plate 3 to give the pillars of the steel frame a reinforced concrete structure, but in some cases the concrete 8 is charged into the section surrounding the steel pillar 1, as shown by the chain line, depending on the required bearing load of the pillars.
Figs. 3 and 4 show another preferred embodiment of the present invention using in all four of the connectors 4 shown in Figs. 1 and 2, for holding respectively upper and lower flanges 2b of the steel beam 2.
In this case, to avoid mutual collision of the bolting portions 4b of the metal connectors 4 placed each side of a flange portion 2b, a filler plate 9 is positioned between the plate 4a of a metal connector 4 and the flange 2b.
Figs. 5 an 6 show a steel pillar 1 with an H-shape cross-section and show a preferred embodiment when the steel beam 2 is connected in one direction.
In this case, the band plate 3 has such a shape of an octagon divided in half and extends between the facing flanges lb, and contacts the internal surfaces of the flanges ib of the steel structure pillar 1, similar to the preceding embodiments, to be connected to the steel beam 2 by the metal connectors 4.
Figs. 7 and 8 show the situation when the web la of the steel pillar 1 has a T-shaped cross-section, and is a preferred embodiment of the present invention when three steel beams 2, for example for side pillars, are bi-directionally connected.
In this case, the band plate 3 is disposed between the neighbouring flanges ib in at least two places, and the arrangement is similar to the preceding embodiment shown in Fig. 1.
Fig. 9 shows a preferred embodiment of the present invention using a split T-shaped metal member as the metal connector 4.
In this case, the arrangement is similar to the preceding preferred embodiments of the present invention, except using bolts 5 to connect the T-shaped connectors 4 to the side flanges of the steel pillar and the beam.
Various modifications may be made to the described embodiments and it is desired to include all such modifications as fall within the scope of the accompanying claims.
Claims (12)
1. A connection between a pillar and a beam in a structural steel framework, the connection comprising a band plate which extends between and is attached to adjacent, vertically extending flanges of the pillar, and a connector for connecting a flange of the beam to a respective flange of the pillar in the region of the band plate, the connector connecting the band plate to the flange of the pillar.
2. A connection as claimed in claim 1, wherein the connector comprises a first bolt portion which extends through the flange of the pillar and the band plate and a second portion which is bolted to the flange of the beam.
3. A connection as claimed in claim 1, wherein the connector comprises a first flange bolted to the flange of the beam and a second flange bolted to the flange of the pillar and the band plate.
4. A connection as claimed in claim 1, 2 or 3, wherein the band defines with a pillar a volume which is filled with concrete.
5. A connection as claimed in any one of claims 1 to 4, wherein the band plate mates with an inside surface of each respective flange of the pillar.
6. A connection as claimed in any one of claims 1 to 5, wherein a band plate is welded in place on the pillar.
7. A structure for a connection between a steel pillar and a steel beam, comprising a metal connector extending between the pillar and the beam and a band plate reinforcing a flange of the pillar, said metal connector being connected to a flange of the beam and being connected to a flange of the pillar and the band plate at the same time, the band plate extending between neighbouring flanges of the pillar.
8. A structure as claimed in claim 7, characterised in that the connector consists of a plain plate portion which has a plurality of bolt holes and overlaps the flange of the beam to be bolted to the flange, and a threaded portion, which passes through the flange of the pillar to be connected to the flange.
9. A structure as claimed in claim 8, characterised in that a metal connector is disposed on both upper and lower sides of a flange of the beam.
10. A structure as claimed in claim 7, characterised in that the metal connector has a T-shape in cross section formed by a web which overlaps the flange of the beam and is bolted to the flange and a bar which overlaps the flange of the pillar and is bolted to the flange.
11. A structure as claimed in any one of claims 7 to 10, characterised in that concrete is charged at least into the inside of the circumference of the band plate over the total length of said pillar.
12. A structure for connecting a pillar to a beam, substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9026489A GB2250563B (en) | 1990-12-05 | 1990-12-05 | Structure for a connection between a pillar and a beam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9026489A GB2250563B (en) | 1990-12-05 | 1990-12-05 | Structure for a connection between a pillar and a beam |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9026489D0 GB9026489D0 (en) | 1991-01-23 |
| GB2250563A true GB2250563A (en) | 1992-06-10 |
| GB2250563B GB2250563B (en) | 1993-12-22 |
Family
ID=10686548
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9026489A Expired - Fee Related GB2250563B (en) | 1990-12-05 | 1990-12-05 | Structure for a connection between a pillar and a beam |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2250563B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016172982A (en) * | 2015-03-17 | 2016-09-29 | 戸田建設株式会社 | Fixing method for joint part steel of composite structure, joint part construction method and joint part structure, anchor bolt fixing jig |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1253033A (en) * | 1968-01-23 | 1971-11-10 | ||
| GB1409718A (en) * | 1971-11-24 | 1975-10-15 | Armitage J S | Joints for structural steelwork |
| GB1503588A (en) * | 1975-07-03 | 1978-03-15 | Profiles & Tubes De L Est | Building frame structural elements and fixing members therefor |
| GB2216217A (en) * | 1988-03-28 | 1989-10-04 | Hitachi Metals Ltd | A joint structure |
-
1990
- 1990-12-05 GB GB9026489A patent/GB2250563B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1253033A (en) * | 1968-01-23 | 1971-11-10 | ||
| GB1409718A (en) * | 1971-11-24 | 1975-10-15 | Armitage J S | Joints for structural steelwork |
| GB1503588A (en) * | 1975-07-03 | 1978-03-15 | Profiles & Tubes De L Est | Building frame structural elements and fixing members therefor |
| GB2216217A (en) * | 1988-03-28 | 1989-10-04 | Hitachi Metals Ltd | A joint structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016172982A (en) * | 2015-03-17 | 2016-09-29 | 戸田建設株式会社 | Fixing method for joint part steel of composite structure, joint part construction method and joint part structure, anchor bolt fixing jig |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9026489D0 (en) | 1991-01-23 |
| GB2250563B (en) | 1993-12-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20011205 |