Fiber-Reinforced Concrete (FRC) Encased Steel Joints for Seismic Resistance

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Title: Fiber-Reinforced Concrete (FRC) Encased Steel Joints for Seismic Resistance

Author(s): S. C. Goel and M. Khuntia

Publication: Special Publication

Volume: 185

Issue:

Appears on pages(s): 35-54

Keywords: composite beams; cyclic loading; ductility; energy dissipation; flexural strength; shear strength; steel fibers; steel joints

Date: 2/1/2000

Abstract:
This paper reports the results of an investigation on the performance of FRC-encased open web steel joists under cyclic loading. The system completely eliminates the need for any shear connectors between steel joists and surrounding FRC as well as that for conventional longitudinal and transverse reinforcing bars, all of which are quite labor intensive. Cyclic load test on some half-scale specimens consisting of composite beams with end connections were carried out. The parameters included the configuration of web steel elements, and the amount of steel in longitudinal and web elements of the joists. The results are most encouraging. interact in a y so as to provide stable hysteretic behavior with excellent energy dissipation and ductuility. The study indicates that shear strength of the composite beam can be remarkably enhanced by addition of structures. The flexural capacity is also considerably increased. It can be quite accurately calculated by analytical models based on full composite action.