Engineers doing structural steel seismic design can reliably count on two documents as being stateoftheart design. There is a good diagram and example in blodgetts design of welded structures on how to analyze the problem on. The design process of the column base plate requires four checks. Design of column base plates islamic university of gaza. The ratio of the concrete to base plate area a2a1 is 4. Risabase is a handy application that is designed to help structural engineers to analyze the behavior of complex base plate and anchor bolt models. The drawings shall clearly distinguish between shop and field welds. Calculation report for column base plate worksheet xls web share 20160705t17. This software design document is for a base level system which will work as a proof of concept for.
Anchor rods and base plates typically are among the last components of a structural steel building to be designed, and yet they are the first components to be placed. Base plate bearing pressure is checked as well as bolt tension, if. The step by step design procedure given in section 4 of sn037 is followed throughout. Specifically, wide flange column base plates may be subjected to axial loads compression or tension, with or without majoraxis column bending, plus majoraxis shear. Base plate analysis spreadsheet civil engineering community.
For such columns, the simple columnbaseplate connection detail shown in figure. Design of column base plates typical column bases, as shown below, consist of a single plate fillet welded to the end of the column and attached to the foundation with four holding down bolts. This results in base plate details that are expensive, difficult to. Online civil engineering courses, university courses, basics of civil engineering, lecture notes, school video training from youtube. An historical perspective including the aisc approach to base plate design. Examples to eurocode steel design to en 1993 bs en page. For such columns, the simple column base plate connection detail shown in figure 1. Base plate design metric units online structural design. Different behaviour should be considered when strength, stiffness and rotational capacity of the base plate loaded by bending moment have to be predicted, see 1. Design of column base plates anchor bolt slideshare.
Interactive design aids in accordance to us codes aci 31811, aisc 14th edition and asce710 guidelines of use after installing a free trial or demo version the interactive templates will be available free of charge. Technical manual 1 design of monopole bases tower numerics. Full and complete information regarding location, type, size, and extent of all welds shall be clearly shown on the drawings. Main example for steel to concrete connection is the assumed behavior of the base plate. The canadian standards association csa does not provide design criteria for floors that support storage. There is a good diagram and example in blodgetts design of welded structures on how to analyze the problem on pages 3. Design model of builtupstiffened column base under large eccentric load biswajit som1, sandip maity2, gokul ch. Aisc has produced more than 30 design guides to provide detailed information on various topics related to structural steel design and construction. For such columns, the simple columnbaseplate connection detail shown in figure 1. Beamcolumn base plate designlrfd method structural. Mar 31, 2015 the design of column base plates involves two main considerations. Pdf design of circular base plate under large bending. For example, a court clerk and an attorney both sign documents, but. Therefore the base plate and anchor rods must be capable n.
Asdip steel is based upon the latest aisc specifications aisc 360 and aisc 341 seismic. The design of column base plates involves two main considerations. Column is connected to the base plate, using 2isa 80x80x6 mm cleat angles with 20 mm bolts. Horova and others published design of circular hollow section base plates find, read and cite all the research you need on researchgate. This design guide is written in terms of a limit states format, unless. The bolts are cast into the concrete base in location tubes or cones and are fitted with anchor plates to prevent pullout. Asdip steel structural design software is utilized by engineers for design of steel base plates, steel and composite beams, steel columns, and shear connections. The distance from the center of the upright to the center of the sign is 24 ft. Example a1, continued code section design procedure calculation step 4.
Engineered solutions structural plate design guide 7 edition. Gholampour and others published design of circular base plate under large bending moment which there is a little gap between base plate and foundation find, read and. Load from an hshaped column is distributed differently along its two axes the base plate. The following is an example of a note that should be shown on the plans. Beamcolumn base plate designlrfd method pages 1 10. Ancholt bolt design with tension and shear using anchor. The base plate and anchors needs to be designed at the intersection between steel design, anchor design and concrete design guidelines. Design model of builtupstiffened column base under large. Nov 28, 2014 design of base plate with shear four principal ways of transferring shear from column base plate into concrete 1. It is common design practice to design a building or struc b. Continental steel public seminar, 6 august 2014, ntu design of plate girder design of plate girder shear resistance if the web is stocky, no shear buckling of web shall occur and the shear strength of the web is given by ec3 part 11 if the web is not stocky, shear buckling governs the failure. Finally, the required base plate thickness is calculated.
These projects have looked at several variables involved in annular base plate design as shown in figure 2. Design to ec3 part 15 nanyang technological university. Column base plate design pdf free download as pdf file. Practical design and detailing of steel column base plates. Seismic design tension ok shear ok design code reference anchor bolt design based on code abbreviation aci 31811 building code requirements for structural concrete and commentary appendix d aci 31811 pip ste05121 anchor bolt design guide2006 pip ste05121 aisc design guide 1. If shear is present, bolt shear as well as interaction of bolt tension and shear, if applicable, are calculated. Baseplt9 steel column base plate analysis per aisc 9th.
O design model o design example o welding to flexible plate o. Base plate and anchor rod design 2nd ed aisc design guide 1. Column base plate design online calculation report checked by date cn 16. Risabase base plate and anchor bolt design software. These base plates limit state design format which may be used as an alter are. There is a separate worksheet for base plate shear lug design, when shear load is high and cannot be effectively handled by bolts. Where possible, the designer should prepare both designs with one set of details and allow the contractor the choice as specified in section 511. The column base stiffness is in particular influenced by behaviour of the tension part of the base plate, see 2. Features fullscreen sharing embed analytics article stories visual stories seo. Design guides are available in printed format and as downloadable pdf documents.
Calculation report for column base plate worksheet. The base plate must transfer the column load in a uniform manner to the supporting structure floor. Jul 20, 20 if shear is present, bolt shear as well as interaction of bolt tension and shear, if applicable, are calculated. Base plate design aisc steel construction code issues. Steel reinforced and fabric reinforced pads have different design criteria. Large moment base plate design, triangular pressure distribution approach design the base plate shown in figure b. Design example 1 cantilevered overhead sign support truss. Baseplt9 is a spreadsheet program written in msexcel for the purpose of analysis of steel column base plates. Design of circular base plates practice periodical on.
Asdip steel is based upon the latest aisc specifications aisc 360 and aisc 341 seismic asdip steel structural design software is also capable to design anchor rods and shear lugs per the latest aci provisions. All the design examples assume the use of either s275 or s355 steel that complies with en 100252. Column base plate design pdf column structural engineering. The column base is subject to the factored force f sd 500 kn. Design guides american institute of steel construction. Several design examples are provided in the following sec tions for each loading. Select your format preference to the left to browse our collection. Base plate design example civil engineering community. One, spread the load so as to maintain the bearing pressures under the allowable values, and the second is with the connection, or anchorage, of the base plate and column to the concrete foundation. Although the explicit solutions for rectangular base plates can be found in many textbooks and aisc design procedures for base plates, a complete design procedure for circular base plates under different loading conditions has not been documented except for a large eccentric load. Column base connection under axial compression this worked example deals with the design of a column base subjected to a compressive axial load. Summary largest base plate dimensions proposed minimum length of base plate proposed minimum width of base plate proposed minimum thickness.
Design of steel column base connections for large eccentricities by victoriaelena rosca, elenacarmen teleman, elena axinte and georgeta baetu gheorghe asachi technical university of iasi faculty of civil engineering and building services received. Pdf steel design guide series column base plates sergio. The design assumptions for the full connection must not contradict each other. Base plate design dherna45 structural op 7 mar 17 03. Software design document 1 introduction the software design document is a document to provide documentation which will be used to aid in software development by providing the details for how the software should be built. This guide follows the format of the 2005 aisc specifi. Design example 1 cantilevered overhead sign support. For example consider testing performed in 1980 on a base plated structure. Check plate thickness since the load is applied directly over the stud, the only requirement on plate thickness is that it satisfy the minimum thickness required for stud welding. The program allows you to enter the parameters of the models and to generate a report with the results of the simulation. Although the shaded area represents the size of the base plate theoretically required, the overall size of the plate can be made larger, to utilize rounded dimensions and to accommodate the holding down bolts. Memo to designer s 71 june 1994 bridge bearings introduction aashto defines a bearing as a structural device that transmits loads while facilitating translation andor rotation. Calculation report for column base plate worksheet xls. Design of base plate with shear four principal ways of transferring shear from column base plate into concrete 1.
If the designer has questions regarding an aspect of structure designs, the designer can. Aisc design guide 01 base plate and anchor rod design 2nd ed. He gives a design example for designing for shear and bolts for base plates. Interactive design aids in accordance to us codes aci 31811, aisc 14th edition and asce710 guidelines of use after installing a free trial or demo version the interactive templates will. Major axis plate dimension mm minor axis plate dimension mm plate thickness mm please select 12 12. The concrete foundation blosk dimensions are 1600 x 1600 x mm. I85 atlanta, ga design a structure to support a sign 22 ft. Plate design guide multi plate aluminum structural plate.
Base plate design a base plate must provide for anchorage and be designed to support the entire profile of the column placed on it. Within the software design document are narrative and graphical documentation of the software design for the project. Lrfd required strength of 60 and 90 kips, respectively, and moments from the dead. Design of column base connection is more complex than other steel to steel connection in a structural system due to its concrete interface. Design example 1 cantilevered overhead sign support truss with post problem statement. Base plate design is a balance between the strength and stiffness of the base plate, the flexibility of the pole, and the weld that connects the two elements. Case of base plate design small momentlarge moment required tension force in anchor rods on one side moment about strong axis required minimum thickness of base plate rounded to nearest higher mm d. In this paper, the concrete underneath the base plate together with the base plate is referred to as component concrete in compression and. Steel structural hollow sections, circular, square and rectangular, are some of the most effi cient structural.
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