Title page for ETD etd-04192001-144626

Type of Document Master's Thesis
Author Piotter, Jason Matthew
Author's Email Address jpiotter@vt.edu
URN etd-04192001-144626
Title Longitudinal Slab Splitting in Composite Girders
Degree Master of Science
Department Civil Engineering
Advisory Committee
Advisor Name Title
Easterling, William Samuel Committee Chair
Murray, Thomas M. Committee Member
Roberts-Wollmann, Carin L. Committee Member
  • Composite Girders
  • Longitudinal Shear
  • Transverse Reinforcement
  • Composite Floor Systems
  • Longitudinal Splitting
Date of Defense 2001-04-06
Availability unrestricted




Jason M. Piotter

Committee Chairman: W. Samuel Easterling

Via Department of Civil and Environmental Engineering


Longitudinal slab splitting in composite hot rolled girders and joist girders was investigated. Two different type of framing configurations were studied with two tests conducted per configuration. The framing configurations were designated as either flush-framed or haunched, which describes the framing of the joists into the joist girders or H-shape. Each floor system consisted of at least one exterior or spandrel joist girder, one interior joist girder, and in three of the four tests, an exterior or spandrel H-shape. The nominal lengths of the girders were 30 ft 4 in. with a centerline spacing of 7 ft for the flush-framed tests and 6 ft 9 in. for the haunch tests. Varying amounts of transverse reinforcement were used in the slab over each girder. Shear connectors were all 0.75 in. diameter headed shear studs of varying lengths. The results of these tests were used to determine the minimum amount of transverse reinforcement required to prevent longitudinal splitting from controlling the strength of the section.

A comparative analytical study was performed to generate a design procedure for determining the appropriate amount of transverse reinforcement. This consisted of adapting existing procedures in reinforced concrete for similar shear problems and generating alternative procedures based on existing research for composite construction. Results from these methods were then calibrated against experimental data obtained in this study.

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