| Summary: | 碩士 === 國立高雄第一科技大學 === 營建工程研究所 === 100 === Generally seismic force is resisted by the diagonal braces in the Concentrically Braced Frame (CBF). However, large residual deformation after earthquakes makes the structure difficult to repair. Therefore, this paper investigates the feasibility of applying a self-centering function on CBF to reduce the residual deformation after the earthquakes. Similar to literatures, beam-column interfaces are separated so that beams can rock on the column face without inducing any damage during earthquakes. Seismic energy is dissipated through the friction dampers installed at the beam bottom flange, or friction dampers or frictional hinge dampers applied on the braces. To validate the proposed idea, a full-size one storey-one span CBF was constructed and tested under lateral cyclic reversed loads. Investigation parameters include locations or types of energy dissipation applied and different frictional materials such as brass or phosphor bronze. Test results show that the self-centering function on CBF can be achieved with little residual deformations and adequate seismic performance. Among all tests, it can be seen that friction dampers with phosphor bronze installed on the brace dissipated more energy than the other types.
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