Research and Development BulletinPortland Cement Association., 1971 - Cement |
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7-WIRE STRAND aggregate ANCHOR Appendix applied assumed ASTM Beam 73 Beam 85 bearing behavior Bonded bottom cables calculated compatibility compression conduit consider cover creep strains crete curvature deflection Details developed diagram distribution effect end of test Equation expansion extended failure fire endurances Fire Resistance fire tests flange forces furnace given Grade 60 Grade 60 bars grout high temperatures high-strength alloy bars hold-down imposed strains included increased indicated Initial length lightweight concrete load lower material MCR's measured mesh method midspan minutes normal weight concrete obtained occurred percent plates Post post-tensioned post-tensioned cold-drawn wire procedure range reinforcing bars shown in Fig shows side spalling specimens steel strand strength stress stress-strain relationships structural Study Table tensile Test duration thermal thermal strains thermocouples tion ture ultimate capacity ultimate moment capacity Unbonded values vary yield