Pull-out strength between the concrete and the CF-anchor using seismic strengthening

Abstract

Adhering carbon fiber sheets onto RC piers is one of the seismic strengthening methods. When the pier has an irregular shape, however, carbon fiber sheets cannot be adhered continuously around the pier and the edge of the carbon fiber sheets have to be fixed with steel plates and anchor bolts. This fixing method has shortcomings. For example: (1) The steel plate is heavy, (2) The execution of work is dangerous because a crane must be used to lift the steel plates. Then, an alternative fixing method using CF-anchors, which consists of bundles of carbon fiber strands, was developed, and the equation of pll-out strength between the CF-anchor and the concrete was proposed.