A comprehensive methodology for the design of fibre-reinforced concrete pavements


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Title: A comprehensive methodology for the design of fibre-reinforced concrete pavements

Author(s): Sunitha K. Nayar; Ravindra Gettu

Publication: Special Publication

Volume: 310


Appears on pages(s): 321-330

Keywords: Fibre-reinforced concrete, pavement design, yield line analysis, fatigue.

Date: 3/17/2017

Use of fibre-reinforced concrete for pavements, though widely established, lacks comprehensive standardization with respect to both design as well as implementation. Most widely used design methods have adopted the established techniques used for slab-on-grade, mostly due to lack of studies specific to pavements. This is a major drawback since the failure of slabs-on-grade is predominantly caused by static loading whereas the failure of pavements, more often than not, occurs at much lower stresses due to fatigue. In this context, a comprehensive design methodology exclusively for FRC pavements is proposed here including the effect of fatigue in conjunction with inelastic analysis. The static load design equation is based on Meyerhof’s ultimate load (yield line) analysis. The material capacity is estimated using the flexural capacity factored by a stress reduction factor for FRC in the cracked and the uncracked state obtained from suitable S-N relations to account for the fatigue stresses. The material parameters incorporated in the design equations include the flexural strength and the equivalent flexural strength of FRC obtained using the unnotched prisms as per Japanese standards (JSCE-SF4).