RC Slabs Strengthened by Bonded Carbon FRP Plates: Part 2--Application


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Title: RC Slabs Strengthened by Bonded Carbon FRP Plates: Part 2--Application

Author(s): H. Ichimasu

Publication: Special Publication

Volume: 138


Appears on pages(s): 957-968

Keywords: bending; bonding; bridges (structures); carbon; epoxy resins; fiber reinforced plastics; measurement; plates (structural members); reinforced concrete; reinforcing steels; slabs; strengthening; structural design; Structural Research

Date: 9/1/1993

Part 1 of this study concluded that reinforcing bar stress intensity can be reduced, thereby confirming the possibility of strengthening. In Part 2, CFRP is bonded by various methods on the lower faces of reinforced concrete slabs. To determine bonding methods in detail, CFRP is studied with respect to the confirmation test and strengthening design methods. Strengthening design and measurement plans are then made for reinforced concrete slabs on an existing bridge. In strengthening design, the main reinforcing bars are strengthened with three to five layers. It is confirmed that the reinforcing bar tensile stress intensity is reduced around 120 to 130 MPa. CFRP may be used as a strengthening material for reinforced concrete slabs. Measurements will be conducted in 1993. Bending resistance will be confirmed directly during existing bridge strengthening operations.