Anchor Bolt Design for Shear and Tension

Anchor Bolt Design for Shear and TensionUMESH J. KHAROD When column base plates are subject to both uplift and very large shear loads, two independent systems are normally used to resist tension in the anchor bolts and shear at the level of the base plate: (1) the length of embedment and the diameter of the anchor bolts are determined on the basis of uplift tension and (2) a shear key is welded to the column base plate to resist shear. If very large shear loads do not accompany the uplift, the anchor bolts can be designed to resist both shear and tension, without using a shear key, as in the following example. EXAMPLE Top OF CoMC- FDM- AMCHoR. BtfL-T Figure 2 Solution: Shear: See Fig. 2. f'c = 3.0 ksi Fp = 0.25/^ = 0.75 ksi ls = \2D (assumed) Ac = (lsD) = \2D2 Given: Design anchor bolts for a column base plate for an uplift of 100 kips, and a shear load of 40 kips due to wind or seismic loading. Use 4 anchor bolts. (See Fig. 1.) (SoLUMM &ASE. PLATE. Concrete resistance for shear: S = y2FpAc = 6FpD2 = (6 X 0.75)D 2 = 4.5D2 ANCHOR &OL.1S Use D = 2 in. ls = \2D = 24 in. Tension: For plain bars, u = 4.75 X l O " 3 ^ For D = 2: Design Data: Load per anchor bolt is as follows: 100/4 = 25 kips 40/4 = 10 kips Umesh /, Khamd is Project Engineer, MikroPul Corp., Summit, New jersey. . /.use u = 0.13 ksi T = u(icD)lt T // = u(irD) {ffc)^2/D u = 4.75 X 10-V2 (3.o)V2/2 = 0.13 ksi 25 0.13(TTX2.0) = 30.61 in. l = Us + h) = (24 + 30.61) = 54.61 in Use / = 4 ft-6 in. 22 ENGINEERING JOURNAL / AMERICAN INSTITUTE OF STEEL CONSTRUCTION Check Bolt Stresses: (a) Ag = Ij-= 3.141 in.2 (AISG Spec. Sect. 1.5.2.1, with n = 7) For A307 bolts, Fy = 33 ksi; Fv = 0.3Fy = 10 ksi Fnfnb = Ft = 0.6 ^ = 20 ksi j Figure 3 -Top op CoNC.,Ft>M. At = 0.754, = 2.356 in.2 ANCHOR. &OUT (b) /« Hf) = & 3 - i 8 8 k s i At) NOMENCLATURE r 25 \2-356 = 10.61 ksi (AISC Spec. Sect. 1.6.3) Ft = 28.0 - 1.6/y = 22.90 ksi < 20 ksi .-. Use Ft or Fb = 20 ksi (c) See Fig. 3. f, Fv Ft Fb Ac D As At FP f'c Is = = = = = = = = = = = Bending moment due to shear S at the level of top of grout = m. m = (S X 1.0) = (10 X 1.0) = 10 kip-in. /* = m (TT/32)/) 3 h I u = = = 10.0 (TT/32) X 2.0 3 = 12.73 ksi (1/1.33) (/, +fb) = (1/1.33) (10.61 + 12.73) = 17.55 ksi <Ft = 20 ksi o.k. /, /* n = = = Yield stress of anchor bolt material, ksi Allowable shear stress in anchor bolt, ksi Allowable tensile stress in anchor bolt, ksi Allowable bending stress in anchor bolt, ksi Area of concrete in compression, in.2 Diameter of anchor bolt, in. Gross area of anchor bolt, in.2 Tensile stress area of anchor bolt, in.2 Allowable bearing stress on concrete, ksi Specified compressive strength of concrete at the end of 28 days, ksi Length of anchor bolt required for resisting shear force on bolt, in. Length of anchor bolt required for resisting tensile force on bolt, in. Total length of embedment required, in. Allowable bond stress of concrete, ksi Actual shear stress in anchor bolt, ksi Actual tensile stress in anchor bolt, ksi Number of threads per inch for anchor bolt 23 FIRST QUARTER / 1980 Documents Similar To Anchor Bolt Design for Shear and TensionSkip carouselcarousel previouscarousel nextDesign of AnchorageAnchor Bolt DesignAnchor Bolt Design GuideAnchor Bolt Designexcel anchor bolt calculator-1Concrete Anchor Bolt Design CalculationASCE - Anchor Bolt Design for Petrochemical FacilitiesAnchor Bolt ACIWind Loads & Anchor Bolt Design for Petrochemical FacilitiesACI 318-08, Appendix DDesign of Headed Anchor BoltsHolding Down BoltsAnchor Bolts DesignAnchor Bolt Design CriteriaAnchor Bolt CalcBeam Column Base Plate DesignBase Plate Design is 800-2007A Teaching Guide for Structural Steel ConnectionsAnchor BoltPinned base platesAnchor BoltDesign of Base Plate for BS5950base plate anchor bolt designDesign of Base PlateRilem 2001 Connection Concrete SteelSteel base plate designHolding Down Systems for Steel StanchionsAnchor Bolt DesignBase Plate Design - BS CodeAnchor Bolt Design IS Code LSDMore From Muhammad BaiquniSkip carouselcarousel previouscarousel nextCara Registrasi Pertamina E-PRocBilling-Rate-INKINDO-2018-CETAK.pdfSGC LNG as an Alternativeped-guidelines_en.pdfLapangan_Panas_Bumi_Kamojang_Terbaik_di DUnia.docGeothermal Plant DesignDaftar Perusahaan Esco per 18 Agustus 2017.pdfPR-1419 - Abandonment and Restoration ProcedureAmmonia Synthesis Detail.pdfGetting Started - Aspen Shell and Tube Exchanger.pdfLampiran Perpres Nomor 58 Tahun 2017.pdfTinjauan Pustaka ASR.pdfBinary Power Plant.pdfSpray Nozzle Quantity CalculationPTK_037_2017_Plan_Of_Development.pdfLNG Storage TankAmmonia and Urea Production.pdfAdvances in the shell coal gasification proces.pdfPresentation 1Booklet_nr_5_Production_of_Urea_and_Urea_Ammonium_Nitrate.pdfMethanol-to-Olefins-Technology_Hydrocarbon-Engineering-Dec-2013.pdfPurpose_of_Minimum_Flow by Randal Ferman, EKWESTREL - HotTopic Hour 9-11-14Clean Coal Technology in Japan 2nd EdPwC Indonesia-mining-in-Indonesia-survey-2016.pdfFlash Steam Geothermal59-73-117-1-10-20161202Lng Ageing1AspenFlareSysAnalV7_3-Start.pdfemsa-final-report-bunkering-lng_op_06_2012_b.pdfKajian Program Pencairan Batubara.pdfBest Books About Stress (Mechanics)The Stress Analysis of Pressure Vessels and Pressure Vessel Components: International Series of Monographs in Mechanical Engineeringby Elsevier Books ReferenceLinear Elastic Theory of Thin Shells: The Commonwealth and International Library: Structures and Solid Body Mechanics Divisionby J. E. GibsonStructural Cross Sections: Analysis and Designby Naveed Anwar and Fawad Ahmed NajamProblems in Strength of Materialsby N. M. BelyayevWelding Deformation and Residual Stress Preventionby Yukio Ueda, Hidekazu Murakawa, and Ninshu MaMechanics of Materials 2: The Mechanics of Elastic and Plastic Deformation of Solids and Structural Materialsby E.J. HearnFooter MenuBack To TopAboutAbout ScribdPressOur blogJoin our team!Contact UsJoin todayInvite FriendsGiftsLegalTermsPrivacyCopyrightSupportHelp / FAQAccessibilityPurchase helpAdChoicesPublishersSocial MediaCopyright © 2018 Scribd Inc. .Browse Books.Site Directory.Site Language: English中文EspañolالعربيةPortuguês日本語DeutschFrançaisTurkceРусский языкTiếng việtJęzyk polskiBahasa indonesiaSign up to vote on this titleUsefulNot usefulYou're Reading a Free PreviewDownloadClose DialogAre you sure?This action might not be possible to undo. Are you sure you want to continue?CANCELOK