Long-Term Performance of Epoxy Adhesive Anchor Systems (2013) / Chapter Skim
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B-1 A P P E N D I X B ACI–AASHTO Resistance Factor Investigation
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B-2 COMPARISON OF ACI AND AASHTO NOMINAL AND FACTORED RESISTANCES This document compares the nominal and factored resistances of various concrete structures and steel anchor bolts as determined by ACI and AASHTO. In this document the following abbreviations are used: ACI = ACI 318-11 (2011)
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From page 129... ...
B-3 general concrete design situations will be compared followed by a comparison of the equations for bolt shear and tension. CONCRETE DESIGN COMPARISON Nominal Resistance The following compares the nominal resistances for concrete flexure, shear, compression, and bearing.
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B-4 Spiral reinforcement ACI Eqn.
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B-5 Table 2: Comparison of ACI strength reduction factors and AASHTO resistance factors. Factor ACI 318-11 AASHTO Tension controlled section 0.90 9.3.2.1 0.90 5.5.4.2.1 Compression-controlled sections (Spiral reinforcement)
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B-7 Factored Resistance For ductile anchors the ratio of the factored resistances calculated by ACI to AASHTO are presented in Table 5 for various bolt diameters. Table 5: Ratio of factored resistance for steel strength in tension as computed by ACI and AASHTO for ductile steel elements.
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B-8 Cast-in headed bolt and hooked bolt anchors and for postinstalled anchors where sleeves do not extend through the shear plane ACI (D-29) For post-installed anchors where sleeves extend through the shear plane or ACI §D.6.1.2(c)
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B-9 Table 6: ACI 318-11 and AASHTO resistance factors for steel shear strength by bolt type. Bolt ACI AASHTO A307 0.65 0.75 F1554 0.65 0.75 Factored Resistance For ductile anchors ratio of the factored resistances determined by ACI (D-29)
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From page 136... ...
B-10 Figure 2: Comparison of ACI and AASHTO tensile-shear interaction equations. ACI §RD.7 allows for any interaction expression which has been verified by test data, so either expression should be acceptable.
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