| dc.description.abstract | In this thesis, a new type of metallic yielding damper with special brace system is introduced and investigated, which is called Dual-oval plate damper. The idea of this design comes from the oval plate damper designed by predecessors. In the previous researches, it is found that the oval plate damper can effectively improve the strength of moment resisting frame when it is subjected to tensile force. However, in opposite side, the damper is easy to buckle because of the mechanism of steel material, and the strength is imbalance between two orientations. Therefore, a new development of oval damper is necessary.
To improve the seismic performance and avoid the different behavior in two directions , Dual-oval plate damper with special sliding brace system is designed to suffer forces in two independent ways, which means two sides of components can be deformed in tension and compression simultaneously. Besides mathematical calculation and numerical analysis, a series of cycling loading experimental tests were applied in this thesis to prove the seismic performance. It turns out the damper can balance strengths between tension and compression. And the result shows this new design not only can enhance the seismic performance of moment resisting frame effectively but also protect main structures from early yielding. | en_US |