The rigid connection is installed at the top of the reinforcedconcretepier, instead of the intersection part of steel girder and reinforcedconcretepier.
The results showed that if 5% steel bars are substituted by carbon fiber bars, the residual deformation and maximum curvature decrease compared with the reinforcedconcretepier.
The text makes four reinforcedconcretepier models. Three of them are strengthened by three different materials and tested to research the ductile capacity of piers and analyzed strengthen effects.