Design Of Composite Beams Research Articles

Composite Beam Design Using Interaction Diagram

The interaction diagram approach for design of prestressed concrete members is extended for design of composite prestressed beams with one or more than one critical section. A systematic approach for the selection of prestressing force and eccentricity is presented and compared with the conventional approach which is one of trial and error. In addition, the use of the interaction diagram and the resulting valid domain provides a visual description concerning the safety of the cross section as well as clues for modifications in the design when it is found unsafe.

Optimum Design of Composite Beam with Sandwich Structure

Optimum Design of Composite Beam with Sandwich Structure

Composite Beams with Web Openings: Design

A general method for the analysis and design of composite steel-concrete beams with openings centered in the web of the steel section is developed. The approach is based on ultimate strength concepts and allows for the presence of variable amounts of reinforcements in the web and partial shear connection. Design equations and a worked example are presented.

A CONTRIBUTION TO THE DESIGN OF COMPOSITE BEAMS TO SATISFY DEFLEXION CRITERIA.

In this paper a method is given which facilitates the design of composite steel-concrete beams. Graphs are developed for establishing suitable span to depth ratios which will ensure that stipulated deflexion criteria can be satisfied. Allowance for the shrinkage effect of the concrete has been made. /Author/TRRL/

Ultimate strength of continuous composite beams

Ultimate strength and failure modes of continuous composite beams are studied experimentally and theoretically. The theoretical analysis is based on a stress-strain relationship for steel including elastic, plastic, and strain-hardening regions and a stress-strain relation for concrete including ascending and descending portions. Behavioral studies were conducted for a series of beams in which steel sections, concrete slab thickness, and amounts of longitudinal slab reinforcement are varied. Three two-span continuous composite beams were tested. Theoretical values of ultimate load are in good agreement with test results. Based on experimental and theoretical results, design requirements are proposed for ultimate strength design of continuous composite beams.

Discussion: Design of Composite Beams with Formed Metal Deck

Discussion

Design of Composite Beams with Formed Metal Deck

For some time steel formed plate and concrete have been used compositely in building floor systems. Usually the formed metal deck is used as a permanent form to carry the fresh concrete and serve as a working platform. After hardening of the concrete, the metal deck and concrete slab act compositely to carry the applied live loads if the metal deck is provided with embossments to provide the shear connection. A natural consequence was to develop composite action for the steel beams over which the formed metal deck was placed. This was first suggested by A. H. Atkinson of Hamilton, Ontario. The AISC Specification for buildings does not provide for composite beams with a formed metal deck between the steel and concrete slab. When the metal deck corrugations are parallel to the beam, they do not interfere with the steel-concrete interaction and the condition is similar to a haunched slab for which the Specification provisions are applicable. However, when the metal deck is placed perpendicular to the steel beams and shear connectors are placed in the ribs of the corrugations, the behavior of the composite system may differ substantially from the expected behavior.

Reinforced concrete joints between prestressed concrete members

Summary The practice has developed in recent years of constructing statically indeterminate prestressed concrete structures by applying connecting restraints to two or more statically determinate prestressed concrete members. The present paper discusses a joint that may be used to convert two or more simply supported prestressed concrete beams into a continuous beam by joining them together over the supports. This joint utilizes unprestressed continuity steel contained within the crosssection of the continuous beam. Alternative designs for such a joint are proposed and examined for suitability in fulfilling the necessary functions. Some remarks are added on the design of composite continuous beams. Tests are reported on five two-span composite beams each made from two post-tensioned, grouted beams. The ratio of the ultimate moments of resistance of the critical sections was varied. The tests demonstrated the essentially satisfactory nature of the proposed joint.

Tentative Recommendations for Design of composite Beams and Girders for Buildings

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