| dc.description.abstract | The damage cause by earthquakes to the structure is a kind of energy transfer, so we can design energy dissipators and install them into the structure to dissipate the energy transmitted by earthquakes； the previous study of the curve damper provides a novel way to dissipate energy, but the force in the tension side and the compression side will be different due to its asymmetric shape. In the compression side, the behavior of damper is easy to reach the critical buckling load, resulting in the damage of damper and strength loss. In order to solve this problem, this study is focus on the improvement of the study before, which is called double S-shaped curved damper. No matter the structure is subject to tension or compression, this kind of double S-shaped curved damper can generate both tension and compression at the same time, to effectively improve the unbalanced situation of the curved damper. With the steel brace system design, we can install the double S-shaped curve damper into the frame to dissipate the energy.
In order to confirm the stability of the double S-shaped curve damper, a series of component tests were conducted. The double S-shaped curve damper and the steel brace were installed into the test setup so that we can do the Cyclic loading test to obtain the hysteresis loops. Based on the result before, we can apply the corresponding Cyclic loading into the moment frame with damper to observe the behavior pattern under force action. The experimental results showed that the double S-shaped curve damper had stable energy dissipation behavior, and also showed the symmetrical strength as predicted, effectively improving the phenomenon of the strength dropping on the compression side before. In the frame test, it can be observed that the installation of this study′s dissipators can effectively improve the overall stiffness and strength of the braced frame, and the energy dissipation capacity can reach more than two times of the moment frame, which proofs that the design of this study can significantly improve the seismic performance of the moment frame. | en_US |