2017 Volume 73 Issue 3 Pages 291-305
Since Hyogo-Ken Nanbu earthquake in 1995, seismic retrofit of existing expressway RC piers has been carried out. In the seismic retrofit methods with continuous fiber, method of wrapping continuous fiber sheets on a pier has been mainly used. However, because this method requires hardening of continuous fiber sheets with resin, there is concern for curing quality and workability of resin. Therefore, we have developed a new seismic retrofitting method which can be easily applied without resin. It is a method of winding a continuous fiber rope on existing RC piers without using resin. We have carried out cyclic loading tests of columns retrofitted with this method, and confirmed that ductility is much improved. And we clarified that the ductility is affected by shear-to-flexural capacity ratio, pier width, spacing of winded continuous fiber rope, and material of continuous fiber rope.
