Performance Analysis Of Seismic Ductility For Bridge Pier With Steel Reinforced Concrete

In seismic engineering application, bridge pier usually allows the plastic hinge appearsin the specific parts of the pier under the strong earthquake, in order to resist earthquake bythe energy dissipation of the plastic hinge. Ordinary reinforced concrete bridge pier usuallycouldn’t supply enough displacement ductility of structure needed. In this paper discusses thatreinforcing steel is used to improve the ductility in the potential plastic hinge region ofreinforced concrete viaduct pier. The practice can enhance safety performance of reinforcedconcrete viaduct pier. The main contents in this paper are described as follows:1. Based on the stress-strain relation of confined concrete and the calculate assumption,a Matlab program that can draw moment-curvature curve of common steel reinforcedconcrete cross-section is developed. And the main influence factors of curvature ductilityfactor of SRC pier are analyzed by this program.2. The seismic design of rectangular piers of the plastic hinge section of the bridge isgiven, then a finite element model is established which can exactly describes materialproperties by the finite element software to simulate the seismic performance of the pierunder the strong earthquake. The calculation comparison with ordinary reinforced concretepier is made under the premise of same steel ratio, which verify that the configuration of steelcan improve the plastic hinge higher ductility for the steel reinforced plastic hinge.3. For the plastic hinge section of rectangular piers, seismic performance research iscarried on. Then a finite element model is established which can exactly describes materialproperties by the finite element software ANSYS to simulate the seismic performance of thepier under the strong earthquake. Using industrial engineering analysis method, displacementductility coefficient and limit displacement of the plastic hinge zone model including steelbone are greater than the plastic hinge zone model without steel bone model. So theconclusion can be obtained that steel bone configuration can improve seismic ductilityperformance of the plastic hinge.