b'FEATURE(Fig. 5a). Under bi-axial loading, yield line is criticalFIGURE 6 : Proposed experimental near the anchor rod which is in tension during bothsetup for column base plate connection testingloading direction (Fig. 5b). There is also a formation of yield lines under the column flange across the width on the other side of the base plate extending to the edge of the base plate (Fig. 5b). Maximum stress is found to be four per cent lower in case of bi-axial loading compared to uniaxial loading since there is alternative tension-compression behaviour under bi-axial loading. PLANNED EXPERIMENTAL PROGRAMWiththefinancialsupportoftheCISC,an extensiveexperimentalprogramwillbe conductedonsixreduced-scaleexposed- Fig. 6: Proposed experimental setup for column base plate connection testing type steel column base plate connections in summer 2020 to establish the design methods andinteractionequationsforcolumnbase connectionsundercombinedaxialloadand bi-axial bending. Two steel HSS columns and four steel wide flange columns (W-section) will be welded to the centre of the base plate. TheINNOVATION column size, as well as width-thickness ratio, will be selected to prevent yielding and local buckling of the column before failure of the base connection. In the experimental study, theThrough Consulting, Creating, Design, thickness of the baseplate for the HSS columnsManufacturing & On Time Deliverywill be kept constant, while two different base plate thicknesses will be considered for wideSalton Pedestrian Bridge24XXH Pipeflangecolumns.Theproposedtestsetupis shown in Fig. 6.Decades of doing the impossible withNEXT STEPSThe next step in this ongoing research is to performStructural and Architectural Steel.experimentalinvestigationsoncolumnbaseThrough a winning combination of persistence, innovation, and good old-fashioned connections under combined axial load and bi-axialhard work, Advanced Bending Technologies has established itself as an industry bending. This research will be critical to potentiallyleader in structural bending, pipe bending, low deformation bending and forming improve base plate and anchor rod design withof structural steel. Our combination of experience and equipment offers you, the customer, a wide range of solutions and capacities in bending and forming. accuracy and economy under multi-axial loading.Whatever your need, whether large projects or small components, we form your All the specimens have been designed and arematerial to your specifications. At Advanced Bending Technologies, the job is not currently being fabricated. Detailed experimentalcomplete until we achieve your requirements in accuracy and repeatability.testing will be done in summer 2020.REFERENCESGrauvilardell, J.E., Lee, D., Hajjar, J.F., and Dexter, R.J.(2005),SynthesisofDesign,Testingand AnalysisResearchonSteelColumnBasePlate ConnectionsinHighSeismicZones,Structural EngineeringReport,No.ST-04-02,DepartmentBC Place Stadium 14 OD xwall California Academy of Sciences W18 x 35#ofCivilEngineering,UniversityofMinnesota, Minneapolis, Minnesota. Celebrating Over 35 Years in the BusinessGomez,I.R.,Kanvinde,A.M.,andDeierlein, G.G. (2010), Exposed Column Base Connections SubjectedtoAxialCompressionandFlexure,1-800-563-2363 Langley, BCTechnicalReportsubmittedtotheAmerican1-403-720-8242 Calgary, ABsales@bending.netInstituteofSteelConstruction,AISC,Chicago,www.bending.netIllinois. ASADVANTAGE STEEL SUMMER 2020|27'