Paper number 472


Charles E. Bakis1, Suresh Pannala1, Renata S. Engel1, and Thomas E. Boothby2

1Department of Engineering Science & Mechanics, 227 Hammond Bldg.,
The Pennsylvania State University, University Park, PA 16802, USA
2Department of Architectural Engineering, 104 Engineering Unit A,
The Pennsylvania State University, University Park, PA 16802, USA

Summary An analytical method was developed for simulating the tensile and pullout behavior of carbon fiber reinforced polymer (CFRP) grids used as reinforcement for concrete. Novel fiber placement patterns in the grids were explored. It was determined that increased proportions of curved fibers, i.e. fibers that provide continuity between the longitudinal and transverse elements of a grid, improves the pullout stiffness of the grid by increasing the shear stiffness of the grid near each joint. However, proportionally larger curved fiber content also degrades the through-joint tensile stiffness and strength of the grid. Excellent agreement between the model and experiments is demonstrated for the case of stand-alone tension loading. The modeling approach established in this paper enables the exploration of improved grid designs and also forms the basis of a more sophisticated model of a concrete structure reinforced with FRP grids.
Keywords grid, concrete reinforcement, analysis, design, manufacturing.

Theme : Reinforcement and repair in Civil Engineering and Building Construction

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