US3716957A - Column flange and stiffener plate construction - Google Patents

Column flange and stiffener plate construction Download PDF

Info

Publication number
US3716957A
US3716957A US3716957DA US3716957A US 3716957 A US3716957 A US 3716957A US 3716957D A US3716957D A US 3716957DA US 3716957 A US3716957 A US 3716957A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
column
plate
flange
slot
support
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.)
Expired - Lifetime
Application number
Inventor
J Bernardi
Original Assignee
J Bernardi
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Grant date

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38Connections for building structures in general
    • E04B1/58Connections for building structures in general of bar-shaped building elements
    • E04B1/5806Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile
    • E04B1/5812Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile of substantially I - or H - form

Abstract

A BEAM IS PROVIDED WITH AN END CONSTRUCTION FOR RIGID CONNECTION TO VERTICAL COLUMN. ONE END OF THE BEAM IS PROVIDED WITH A RIGIDLY CONNECTED VERTICALLY EXTENDING SUPPORT PLATE. A STIFFENER PLATE PROVIDED WITH A CENTRALLY LOCATED, VERTICALLY EXTENDING ELONGATED SLOT IS INTERPOSED BETWEEN ONE FLANGE OF THE COLUMN AND THE SUPPORT PLATES WITH ONE SIDE OF THE STIFFENER PLATE IN SURFACE TO SURFACE CONTACT WITH ADJACENT COLUMN FLANGE. THE STIFFENER PLATE IS WELDED TO THE COLUMN FLANGE, WITH WELD MATERIAL COMPLETELY OCCUPLYING THE ELONGATED VERTICAL SLOT TO THEREBY RIGIDLY CONNECT THE STIFFENER PLATE TO THE OPPOSING FLANGE OF THE COLUMN AND THEREBY INCREASE THE EFFECTIVE THICKNESS OF THE COLUMN FLANGE. THE SUPPORT PLATE ABUTS THE OPPOSITE SIDE OF THE STIFFENER PLATE. A PLURALITY OF HIGH STRENGTH BOLTS EXTEND THROUGH THE SUPPORT PLATE, STIFFENER PLATE AND COLUMN FLANGE TO PROVIDE A RIGID CONNECTION, WITH THE BOLTS BEING LOCATED AND ARRANGED IN ROWS ON OPPOSITE SIDES OF THE WELDED SLOT-JOINTED SO THAT THE FORCE APPLIED TO THE COLUMN FLANGE IS ROTATED 90* AND DISTRIBUTED THROUGHOUT THE WEB OF THE COLUMN.

Description

INVENTOR mgl/ATTORNEYS l F'IG-4 J. T. BERNARDI Filed Oct. 25. 1970 COLUMN FLANGE AND STIFFENER PLATE CONTRUCTION Feb. 20, 1973 United States Patent O 3,716,957 COLUMN FLANGE AND STIFFENER lLATE CONSTRUCTION James T. Bernardi, 17200 Fairfield, Detroit, Mich. 48221 Filed Oct. 23, 1970, Ser. No. 83,328 Int. Cl. EME; 1/18; Flh 9/02 U.S. Cl. 52--633 3 Claims ABSTRACT OF THE DISCLOSURE A beam is provided with an end construction for rigid connection to a vertical column. One end of the beam is provided with a rigidly connected vertically extending support plate. A stiflener plate provided with a centrally located, vertically extending elongated slot is interposed between one ilange of the column and the support plate, with one side of the stiflener plate in surface to surface contact with the adjacent column flange. The stiffener plate is welded to the column flange, with weld material completely occupying the elongated vertical slot Ito thereby rigidly connect the stiffener plate to the opposing flange of the column and thereby increase the eilective thickness of the column flange. The support plate abuts the opposite side of the stiflener plate. A plurality of high strength bolts extend through the support plate, stiflener plate and column flange to provide a rigid connection, with the bolts being located and arranged in rows on opposite sides of the welded slot-joint so that the force applied to the column flange is rotated 90 and distributed throughout the web of the column.

BACKGROUND OF THE INVENTION A rigid connection between a beam and column has received acceptance in the building industry in connection with the erection of multi-story steel building frames. With the advent of high strength bolts, the end plate on the beam has proved to be an effective way of developing a fixed end connection. With later specifications of the American Institute of Steel Construction, lnc., (as an example, set forth in its Manual of Steel Construction, sixth edition, 1965) and the use of plastic design it has become necessary to provide column flange stiffener plates to transfer the forces developed at the end connections where large moments occur.

In the past, using present design techniques, a rigid connection of an H-shaped beam to a vertical column has been accomplished by interposing a stiffener plate between the column flange and the support plate or" the horizontal beam. High strength bolts are inserted through the support plate, stitfener plate and column flanges. The bolts are usually arranged in two vertically extending rows on opposite sides of the column web. It has been found that the portion of the column flange intermediate the rows of bolts pulls away or defiects from the stiflener plate thereby decreasing the bolt efliciency. In addition the web and flange of the column are overstressed and the advantages of using a stiffener plate are not achieved. This prying action or separation of the column flange from the stiflener plate has prevented the complete or full development of fixed end connections.

The present invention has overcome the problem stated. The stiflener plate used in the present invention is fabricated in the shop and is provided with an elongated slot. The stiflener plate, as an example, is welded to the column llange in the shop; increases the effective thickness of the column flange; and eliminates the aforesaid prying action of the prior art.

SUMMARY OF THE INVENTION A fixed end construction for an H-shaped beam having a rigid connection to a vertical column is provided. A

lCC

support plate is rigidly secured by welding to one end of the beam. A stiffener plate having a slot therein has one side abutting one lflange of the column. The support plate is welded to the column flange, with the weld material completely occupying and filing the slot and rigidly connecting the stiffener plate to the column flange in surface to surface engagement. The stiflener plate when welded to the column flange increases the effective thickness of the flange. The support plate on the beam abuts the stifener plate and is fastened to the column by a plurality of high strength bolts which extend through the stiffener and support plates and flange. With such a construction the bolts are located and arranged so that the force applied to the column flange is rotated at and distributed throughout the web of the column without overstressing same.

In the drawing:

FIG. 1 is a side elevational view of a beam and column assembly in accordance with the present invention;

FIG. 2 is a sectional View taken substantially along the line 2 2 of lFIG. 1 looking in the direction of the arrows;

FIG. 3 is a sectional view taken substantially along the line 3-3 of FIG. 1 looking in the direction of the arrows; and

FlG. 4 is a further embodiment of the present invention.

The beam 10 of the present invention is fabricated for interconnection between adjacent columns 12, 14 forming part of a frame complex, generally a multi-story frame of a building. The columns l2, 14 are vertically oriented while the beam 1t) is horizontally oriented as is standard.

Each beam lil is generally H-shaped and includes parallel horizontally oriented flanges 16, 1S interconnected at substantially the midpoint thereof by a longitudinally extending vertically oriented web 22 which is normal to the plane of the flanges. Each I-l-shaped column 12, 14 includes parallel vertically extending flanges 24, 26 interconnected at substantially the midpoint thereof by a longitudinally extending vertically oriented web 28 which is normal to the plane of the flanges.

The invention is particularly applicable to beams and columns of the type referred to as wide flange beams utilized for heavy duty frame construction purposes. It will, of course, be appreciated that generally H-shaped beams of other designs, such as junior beams and light weight beams may be modified in accordance with the invention for structural purposes where such beams and columns are utilized. Additionally, the invention may be utilized in connection with both regular series beams and special series beams, the difference in these designations relating only to the degree of demand for particular structural shapes. The only basic limitation on the beams is that they have a generally H-shaped cross-section. The H-shape may be interpreted to include what are referred to as I-beams which also include a pair of narrower spaced apart parallel flanges interconnected by a central web which is normal to the plane of the flanges.

The beam 10 is adapted at each end 3i?, 32 for rigid connection to the columns 12, 14. Support plates 36, 3S of rectangular configuration are Welded to the ends 30, 32 respectively of the beam l0. The support plates 36, 3S abut the ends of the beam 10. Welds are provided between the abutting ends of the Webs 22 and the abutting edges of the upper and lower flanges 16, 18. Thus the support plates 36, 38 are rigidly connected to the beam 10. The welds connecting the support plates 36, 38 to the beam l0 are designed in accordance with acceptable welding design standards to withstand the shear forces encountered under load.

Each column l2, 14 is provided with a stiflener or helper plate 40, each stitfener plate 40 being of identical construction. The stifener plate 40 is elongated and of rectangular configuration as best illustrated in FIG. 3 and is provided with a centrally located, vertically extending slot 42. The length' of the slot 42 is substantially greater than the width of the slot 42 as illustrated in FIG. 3. The slot 42 is located along the longitudinal center line of the stillener plate 40. Stifener plate 40 is welded to the column ilange 24 by a weld joint 44 which completely fills the slot 42 and rigidly connects the stiffcner plate 40 to the column flange 24. The specific length and width of the slot 42 and the area of the weld joint 44 is dependent upon the end moment to be encountered at the point of connection.

Two vertical rows 46 of bolt openings 48 are provided in the stifener plate 40, with one row 46 on each side of the slot 42 as illustrated in FIG. 3. Each row 46 contains a plurality of openings 48 dependent, of course, upon the number of high strength bolts 5t) required for the specic end connection.

Each support plate 36, 38 and column llange 24 have a pair of rows of bolt openings. Such rows and the openings in each row are spaced apart the same identical distance as in the support plate 40. After the beam has been erected in the eld high strength bolts 50 are inserted through the aligned openings provided in the support plate 36, 38, stiffener plate 40 and column flange 24 and nuts 52 secured thereto properly torqued.

The column tlange stiffener plate 40 enables the forces encountered under load to be distributed at the end connection without overstressing the column flange 24 and the web 28 of the column. It should be noted that the stilener plate 40 is welded to the column flange 24 by the establishment of the weld joint 44 in the slot 42. The vertical weld joint 44 ties the stitfener plate 40 and column ange 24 together so that when the end or support plate 36, 38 of the beam 10 is clamped against the stiffener plate 40 there is no relative movement between the column flange 24 and the stillener plate 40. With such a welded construction the prying action or separation of the intermediate portion of the column llange between the rows of bolts from the stiffener plate is eliminated as is now encountered in the art.

It will be appreciated that in the design of the end connection the stiiener plate 40 which is fixedly and rigidly held against the ilange 24 of the column in etect develops a new tlange thickness t. The stiffener plate 40 works in unison with the column llange 24 and serves a triple function. It will be appreciated that the etlciency of the bolts is increased due to the elimination of the aforementioned prying action. In addition, the stress of Y the column flange is reduced due to the increase of the effective flange thickness 1. Finally, the bolts securing the end or support plate to the column are so located and arranged that the force applied to the flange of the column may be rotated 90 and fanned out or distributed throughout the web without overstressing same. The fixed end connection is designed whereby the stress in the web Sw equals the stress in the flange Sp The stitener plate 40 may be fabricated in one piece or of unitary construction as described in connection with the embodiment in FIGS. 1-3 inclusive or fabricated from two elongated elements which are welded together at the opposing longitudinal edges thereof and to the column ange as illustrated in FIG. 4.

In the modified embodiment of PIG. 4 the column 12 is provided with a pair of elongated plates or elements 56 and 58 which are spaced apart from the longitudinal center line of the column tlange 24 to form the elongated slot or space 59. The opposing longitudinal edges 69 and 62 of the plates 56 and 58 respectively are welded together and to the column flange 24. An upper weld joint 64 completely fills the upper part of the space or slot 59 provided between the plates 56 and 58 thereby tying the plates together and to the column flange 24. A lower weld joint 60 completely occupies the lower portion of the space or slot 59 and ties the opposing edges of the plates 56 and 58 together and to the column flange 24 as illustrated. The longitudinal spacing between the plates 56 and 58 and the areas of the weld joints 58 and 60 is dependent upon the end moment to be encountered at the point of connection. T he portion of the slot S9 intermediate the weld portions 58 and 60 is open as illustrated.

The welding of the plates 56 and 58 together and to the column fiange 24 takes place in the Shop. With such a construction the elements 56 and 58 and column ange 24- act as a unit. In addition, the two vertical rows 46 of bolt openings 48 are also fabricated in the shop as are the openings provided in the column flange 24 and in the support plate 36. The high strength bolts 50 are inserted in the field through the aligned bolt openings as described previously.

What is claimed is:

1. A rigid framing structure comprising a vertical column of H-shaped cross-section having parallel, vertical rst and second flanges interconnected by a web arranged perpendicular thereto, a horizontal beam of H-shaped cross-section extending at right angles from said column and having parallel, horizontal top and bottom tlanges interconnected by a web arranged perpendicular thereto, a ilat, elongated, vertical support plate having one side abutting one end of said beam in surface-to-surface relation, the ends of the ilanges and web of said beam being welded to said support plate, a ilat, elongated, vertical stiener plate having one side abutting the outer side of said rst flange of said column in surface-to-surface relation, said stittener plate having a vertical weld slot on the longitudinal center line thereof, a weld joint in said weld slot rigidly securing said stiiener plate to said first flange of said column to thereby increase the effective thickness of said lirst flange, said support plate abutting said stiflener plate in surface-to-surface relation, vertical rows of aligned openings in said support plate, stillener plate and first flange on opposite sides of said slot, and high strength bolts extending through said aligned openings to secure said column and beam together, said bolts as thus positioned being located and arranged so that the force applied to said first flange is rotated and distributed throughout the web of said column Without overstressing same whereby the stresses in said first flange and web of said column are essentially equal.

2. The rigid frame structure defined in claim 1, wherein said stitfener plate is of unitary construction.

3. The rigid framing structure dened in claim 1, wherein said stillener plate comprises two vertical elongated elernents having the adjacent longitudinal edges spaced apart to define said slot, said weld joint lincluding an upper weld portion in the upper part of said slot and a lower weld portion in the lower portion of said slot, the portion of said slot between said weld portions being open.

References Cited UNITED STATES PATENTS 2,382,584 S/l945 Scheyer 287-18936 B 3,295,288 l/l967 Balcke et al. 287-189.36 B 3,593,477 7/1971 Briggs 52-283 1,802,994 4/1931 Williams 52-645 2,375,116 5/1945 Larkin 52--729 3,224,151 l2/l965 Nystrom 52-639 FOREIGN PATENTS '213,245 2/ 1958 Australia 52-690 790,372 2/1958 Great Britain 287-189.36 B 609,886 2/ 1935 Germany 52-729 FRANK L. ABBOTT, Primary vExaminer J. L. RIDGILL, JR., Assistant Examiner U.S. Cl. XJR.

US3716957A 1970-10-23 1970-10-23 Column flange and stiffener plate construction Expired - Lifetime US3716957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US8332870 true 1970-10-23 1970-10-23

Publications (1)

Publication Number Publication Date
US3716957A true US3716957A (en) 1973-02-20

Family

ID=22177612

Family Applications (1)

Application Number Title Priority Date Filing Date
US3716957A Expired - Lifetime US3716957A (en) 1970-10-23 1970-10-23 Column flange and stiffener plate construction

Country Status (1)

Country Link
US (1) US3716957A (en)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047341A (en) * 1976-10-29 1977-09-13 Bernardi James T Frame structure
US4328761A (en) * 1979-05-07 1982-05-11 Dwyer William F Suction cup mounted holder for watercraft
US4811542A (en) * 1987-12-31 1989-03-14 Jewell Ricky S Deck bracket and method of attaching a deck to a building
US4953339A (en) * 1987-12-31 1990-09-04 Jewell Ricky S Deck bracket for of attaching a deck to a building
US5148642A (en) * 1988-08-24 1992-09-22 Arbed S.A. Antiseismic steel structural work
US5201156A (en) * 1991-05-22 1993-04-13 Newman William O Water-shedding spacing mount for decks and fences
WO1997009503A1 (en) * 1995-09-01 1997-03-13 Seismic Structural Design Associates, Inc. Steel frame stress reduction connection
US6237303B1 (en) * 1995-04-11 2001-05-29 Seismic Structural Design Steel frame stress reduction connection
US20040107651A1 (en) * 2002-12-10 2004-06-10 Johnson Jeffrey L. Apparatus and method for assembling a press box through the use of modular componentry
US7047695B2 (en) 1995-04-11 2006-05-23 Seismic Structural Design Associates, Inc. Steel frame stress reduction connection
US7213379B2 (en) 2004-08-02 2007-05-08 Tac Technologies, Llc Engineered structural members and methods for constructing same
US20070256389A1 (en) * 2006-05-03 2007-11-08 Davis John D Sheet Metal Web Stiffener And Chord Nailing Restrictor For Wooden I-Joist
US20070289234A1 (en) * 2004-08-02 2007-12-20 Barry Carlson Composite decking material and methods associated with the same
US20080295453A1 (en) * 2004-08-02 2008-12-04 Tac Technologies, Llc Engineered structural members and methods for constructing same
US20090075031A1 (en) * 2007-09-18 2009-03-19 Carlson Barry L Structural member
US20090094929A1 (en) * 2004-08-02 2009-04-16 Carlson Barry L Reinforced structural member and frame structures
EP2058445A1 (en) * 2007-11-10 2009-05-13 Politechnika Swietokrzyska Prestressed abutting joints and the manner of making thereof
US20090223166A1 (en) * 2008-03-05 2009-09-10 Itec Corporation Connecting structure for steel frame columns and steel frame girders
US20100205891A1 (en) * 2009-02-16 2010-08-19 Bong William L Assembly, system and method for automated vertical moment connection
US20110179725A1 (en) * 2006-12-22 2011-07-28 Badri Hiriyur Moment frame connector
US20140311059A1 (en) * 2004-05-18 2014-10-23 Simpson Strong-Tie Company, Inc. Moment frame links wall
CN104213644A (en) * 2014-09-13 2014-12-17 内蒙古科技大学 H section steel girder-column minor axis connecting end plate node and preparing method of H section steel girder-column minor axis connecting end plate node

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4047341A (en) * 1976-10-29 1977-09-13 Bernardi James T Frame structure
US4328761A (en) * 1979-05-07 1982-05-11 Dwyer William F Suction cup mounted holder for watercraft
US4811542A (en) * 1987-12-31 1989-03-14 Jewell Ricky S Deck bracket and method of attaching a deck to a building
US4953339A (en) * 1987-12-31 1990-09-04 Jewell Ricky S Deck bracket for of attaching a deck to a building
US5148642A (en) * 1988-08-24 1992-09-22 Arbed S.A. Antiseismic steel structural work
US5201156A (en) * 1991-05-22 1993-04-13 Newman William O Water-shedding spacing mount for decks and fences
US5680738A (en) * 1995-04-11 1997-10-28 Seismic Structural Design Associates, Inc. Steel frame stress reduction connection
US6237303B1 (en) * 1995-04-11 2001-05-29 Seismic Structural Design Steel frame stress reduction connection
US7047695B2 (en) 1995-04-11 2006-05-23 Seismic Structural Design Associates, Inc. Steel frame stress reduction connection
WO1997009503A1 (en) * 1995-09-01 1997-03-13 Seismic Structural Design Associates, Inc. Steel frame stress reduction connection
US20040107651A1 (en) * 2002-12-10 2004-06-10 Johnson Jeffrey L. Apparatus and method for assembling a press box through the use of modular componentry
US20140311059A1 (en) * 2004-05-18 2014-10-23 Simpson Strong-Tie Company, Inc. Moment frame links wall
US7882679B2 (en) 2004-08-02 2011-02-08 Tac Technologies, Llc Engineered structural members and methods for constructing same
US20070193212A1 (en) * 2004-08-02 2007-08-23 Tac Technologies, Llc Engineered structural members and methods for constructing same
US20070289234A1 (en) * 2004-08-02 2007-12-20 Barry Carlson Composite decking material and methods associated with the same
US20080295453A1 (en) * 2004-08-02 2008-12-04 Tac Technologies, Llc Engineered structural members and methods for constructing same
US8438808B2 (en) 2004-08-02 2013-05-14 Tac Technologies, Llc Reinforced structural member and frame structures
US7213379B2 (en) 2004-08-02 2007-05-08 Tac Technologies, Llc Engineered structural members and methods for constructing same
US8266856B2 (en) 2004-08-02 2012-09-18 Tac Technologies, Llc Reinforced structural member and frame structures
US7930866B2 (en) 2004-08-02 2011-04-26 Tac Technologies, Llc Engineered structural members and methods for constructing same
US7721496B2 (en) 2004-08-02 2010-05-25 Tac Technologies, Llc Composite decking material and methods associated with the same
US20090094929A1 (en) * 2004-08-02 2009-04-16 Carlson Barry L Reinforced structural member and frame structures
US8938882B2 (en) 2004-08-02 2015-01-27 Tac Technologies, Llc Reinforced structural member and frame structures
US20070256389A1 (en) * 2006-05-03 2007-11-08 Davis John D Sheet Metal Web Stiffener And Chord Nailing Restrictor For Wooden I-Joist
US20110179725A1 (en) * 2006-12-22 2011-07-28 Badri Hiriyur Moment frame connector
US8375652B2 (en) * 2006-12-22 2013-02-19 Simpson Strong-Tie Company, Inc. Moment frame connector
US20090075031A1 (en) * 2007-09-18 2009-03-19 Carlson Barry L Structural member
US8065848B2 (en) 2007-09-18 2011-11-29 Tac Technologies, Llc Structural member
EP2058445A1 (en) * 2007-11-10 2009-05-13 Politechnika Swietokrzyska Prestressed abutting joints and the manner of making thereof
US20090223166A1 (en) * 2008-03-05 2009-09-10 Itec Corporation Connecting structure for steel frame columns and steel frame girders
US7874120B2 (en) * 2008-03-05 2011-01-25 Itec Corporation Connecting structure for steel frame columns and steel frame girders
US8074359B2 (en) * 2009-02-16 2011-12-13 Bong William L Assembly, system and method for automated vertical moment connection
US20100205891A1 (en) * 2009-02-16 2010-08-19 Bong William L Assembly, system and method for automated vertical moment connection
US8898907B1 (en) * 2009-02-16 2014-12-02 William L. Bong Assembly, system and method for automated vertical moment connection
CN104213644A (en) * 2014-09-13 2014-12-17 内蒙古科技大学 H section steel girder-column minor axis connecting end plate node and preparing method of H section steel girder-column minor axis connecting end plate node

Similar Documents

Publication Publication Date Title
US3396499A (en) Structural members for building construction
US3593477A (en) Reinforced concrete columns or beams
US2744590A (en) Load-supporting structures
US4129974A (en) Warp-restraining device and improvement to beams, girders, arch ribs, columns and struts
US6516583B1 (en) Gusset plate connections for structural braced systems
US5216860A (en) Building system for reinforced concrete construction
US3396502A (en) Suspension system for building construction
US4295310A (en) Precast concrete joist composite system
US3062340A (en) Girder units and connecting members
US4275534A (en) Hexagonal building structures
US3421280A (en) Building construction
US2936051A (en) Metal structural unit
US4950026A (en) Passenger vehicle body frame
US4379651A (en) Method for releasably rigidly fastening two intersected overlapping metal profiles and means therefor
US4773192A (en) Building structures
US2008087A (en) Metallic structure
US4014089A (en) Method of connecting beams and columns of steel frame construction
US3466824A (en) Modular space deck
US4349996A (en) Integrated roof system
US4887406A (en) Structural member for buildings
US3066771A (en) Prefabricated bridge deck panels
US4744541A (en) Multiple purpose concrete form
US3152671A (en) Structural truss components or the like
US3141531A (en) Roof construction
US6754992B1 (en) Connecting apparatus