Design of Partially or Fully Composite Beams, with Ribbed Metal Deck, Using LRFD Specifications
A Hindu saying states, "One picture is worth a thousand words (numbers)." With this optic in mind, the design aspects of steel-concrete composite beams using the recently adopted LRFD specifications 1 are analyzed critically and the significance of several parameters is brought out clearly. Charts are then constructed to facilitate the design of partially or fully composite beams using rolled-steel, wideflange sections of A36 steel or A572 Gr. 50 steel. The slab may be a composite metal deck slab with ribs perpendicular to the beam, a haunched slab or, simply, a flat soffit concrete slab. The charts cover both adequate and inadequate slabs. The charts provided are a valuable tool from the practical standpoint, and also familiarity with them should contribute to the student's and young engineer's overall feel of the composite beam design problem. The design charts given here complement the composite beam design tables provided in the LRFD manual.
Composite steel-concrete construction
Keywords: 000a31/ICOM Note: Report of the Subcommittee on the State-of-the-Art Survey of the Task Committee on Composite Construction of the Committee on Metals of the Structural Division. Proceedings of the American Society of Civil Engineers Reference ICOM-ARTICLE-1974-001 Record created on 2008-01-24, modified on 2016-08-08
THE BEHAVIOR OF COMPOSITE STEEL AND LIGHTWEIGHT CONCRETE BEAMS
RESULTS ARE GIVEN FOR TESTS ON FIVE SMALL-SCALE COMPOSITE BEAMS WITH LIGHTWEIGHT CONCRETE SLABS AND ONE BEAM WITH A NORMAL WEIGHT CONCRETE SLAB. ALL BEAMS WERE PROVIDED WITH ADEQUATE SHEAR CONNECTIONS PROPORTIONED ACCORDING TO THE PRINCIPLES OF CURRENT SPECIFICATIONS FOR COMPOSITE CONSTRUCTION. THE LOSSES IN COMPOSITE ACTION WOULD APPEAR TO BE LESS FOR THE BEAMS WITH LIGHTWEIGHT SLABS THAN FOR SIMILAR BEAMS WITH NORMAL WEIGHT SLABS. IN FIVE OF THE BEAMS, FAILURE OCCURRED BY PUNCHING OUT OF WEDGES OF CONCRETE FROM IN FRONT OF THE CONNECTORS. THE MEASURED ULTIMATE LOADS WERE, HOWEVER, ALL IN EXCESS OF THE THEORETICAL ULTIMATE LOADS DETERMINED ACCORDING TO SIMPLE PLASTIC THEORY. /AUTHOR/