抄録
Recently, continuous fiber sheet (CFS) methods (mainly carbon fiber and/or aramid fiber) havebeen increasingly used for the prevention of concrete spalling from tunnel linings. However, no sufficient design criteria or countermeasure selection criteria have been established. So the establishment of rational design method has been desired for the application of CFS methods.
In this paper, series of punching shear tests of CFS retrofitted slabs were conducted, and an evaluation method of the effect of CFS was proposed as a mile stone to the establishment of design criteria. Also, thepast concrete spalling accidents were analyzed and categorized in four levels according to their spalling scales, and selection criteria of the CFS methods were proposed.
