Influence of Embedded Service Ducts on the Strength of Continuous Reinforced Concrete T-Beams

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Title: Influence of Embedded Service Ducts on the Strength of Continuous Reinforced Concrete T-Beams

Author(s): Kenneth T. Burton

Publication: Journal Proceedings

Volume: 62

Issue: 10

Appears on pages(s): 1327-1344

Keywords: beam, bond strength, code requirements, deflection, embedded service ducts, floor system, reinforced concretet, research, shear strength, T-beam, ultimate strength

Date: 10/1/1965

Abstract:
This paper reports load tests to failure of two wide, shallow T-beams subjected to uniform load over an 18-ft span with a negative restraint moment at one end. The beams were designed in accordance with the requirements of the ACI Building Code (ACI 318-63) for ultimate strength design. They were identical in all respects except that one of the beams had ten 7 x l-3/8-in. ducts spaced at 12-in. centers embedded in the 7-in. T-beam flange, These ducts necessitated respacing and grouping of the shear reinforcement in that beam. Both beams failed in flexure, and the load-carrying capacity was not affected significantly by the embedment of the service ducts in the flange thickness.