Experimental Study On Energy Dissipation Hinge Of Different Yield Reinforcement Concrete Structure

Study of plastic-hinge in reinforced concrete structure has been attracted more attention in the worldwide. The plastic-hinge has improved the capacity of energy dissipation and the ductility of the structure, but in the region of the plastic hinge has entered reinforcement yielding and concrete crashing stage.According to inadequates of reinforced concrete plastic-hinge, in this paper, energy dissipation hinge is put forward in the reinforced concrete frame structure. The energy dissipation hinge is composed of large deformed concrete and different yield steel bars. The high yield strength steel offer elastic restoring force and the low yield strength steel is to dissipate energy. Compared with the plastic-hinge of reinforced concrete structure, the energy dissipation hinge has many advantages as follows:(1) The energy dissipation hinge has used the large deformed concrete, which has 4 times the deformation of ordinary concrete. It can improve non-injury deformability, the ability of energy dissipation and shock absorption.(2) The low yield strength steel has been into the yield stage earlier than the high yield strength steel, while the component is on the elastic stage, so the new structure has more hysteretic properties could improve The damping ratio of structure with the energy dissipation hinge is twice to the ordinary. Compared with ordinary frame structure, the frame structure with energy dissipation hinge has better energy dissipation ability, and acceleration response of a structure under earthquake action was 50% lower.(3)The structure with energy dissipation hinges could integrate structure, material with damper, which could save space and reduce costs.The main aims of the dissertation are to study reasonable structural form of the energy dissipation hinge, the basic mechanical properties, energy dissipation mechanism and set up a relevant model of static. The primary contents of this research are as follows:(1) Study of large deformed concrete, including experimental studies of polymer cement mortar, development of large deformed concrete, etc. (2) Study of structure with different yield steel bar, including constitution design, mechanics analysis, heat treatment on steel bars, etc.(3) Experimental study on the beam with energy dissipation hinge, study the seismic behavior such as the failure pattern, crack development, hysteresis characteristic, skeleton curve, capacity of energy dissipation, etc.(4) Numerical simulation of frame structure with energy dissipation hinge, study dynamic characteristics, including modal analysis, harmonic response analysis, seismic wave transient analysis, etc.