Design of Prestressed Concrete Structures

additional allowable amount anchorage applied assumed average balanced bars beam bending bond bottom fiber bridge cable carried column compression compressive stress computed considered construction continuous cost cracking creep curve deflection desirable determined developed diagram direct discussed distribution eccentricity economical effect elastic engineers example external factor failure flange flexural force formula friction girder given Hence increase indicated initial jacking k-ft length limit live load load loss materials maximum method midspan moment moments necessary nonprestressed obtained pile portion possible post-tensioned practice pre-tensioned precast pressure prestressed concrete prestressed-concrete produced ratio reinforced reinforced concrete resisting result shear shown shrinkage simple slab Solution span specified steel strain strands structure supports tendons tensile stress tension tests theory transfer ultimate strength unit usually vary weight wires