FATIGUE BEHAVIOR OF RC SLABS STRENGTHENED EXTERNALLY WITH CFRP SHEETS

FARGHALY, Ahmed Sabry; UEDA, Tamon

doi:10.21608/jesaun.2011.120406

FATIGUE BEHAVIOR OF RC SLABS STRENGTHENED EXTERNALLY WITH CFRP SHEETS

Document Type : Research Paper

Authors

Ahmed Sabry FARGHALY ¹
Tamon UEDA ²

¹ Lecturer, Dept. of Civil Engineering, Faculty of Engineering, Assiut University

² Professor, Div. of Built Environment, Graduate School of Engineering, Hokkaido University, Sapporo, Japan

10.21608/jesaun.2011.120406

Abstract

In this paper, the strengthening of two-way slabs using CFRP sheets is
evaluated experimentally. The reinforcement ratio equal to 1.29% was
chosen to serve the purpose of demarcating the punching shear failure
mode. Results show that the punching capacity of two-way slabs can
increase to 40% over that of the reference specimen. However, since
bridge deck slabs directly sustain repeated moving wheel loads, they are
one of the most bridge elements susceptible to fatigue failure. Therefore,
this research is designed to investigate the fatigue behavior and fatigue
life of concrete bridge deck slabs strengthened externally with CFRP
sheets. A total of five slabs were constructed and tested under
concentrated monotonic and cyclic loading until failure. Results are
presented in terms of deflections, and strains in steel and CFRP at
different levels of cyclic loading. The results showed the longer fatigue
life of concrete bridge deck slabs strengthened CFRP sheets.

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