Seismic design or retrofit of buildings with metallic structural fuses by the damage-reduction spectrum

Springer Science and Business Media LLC - Tập 14 - Trang 85-96 - 2015
Gang Li1, Yi Jiang2, Shuchuan Zhang3, Yan Zeng1, Qiang Li3
1State Key Laboratory of Structural Analysis of Industrial Equipment, Dalian University of Technology, Dalian, China
2CCCC Third Harbor Consultants Co. Ltd, Shanghai, China
3Xiamen Hordor Architecture & Engineering Design Group Co., Ltd, Xiamen, China

Tóm tắt

Recently, the structural fuse has become an important issue in the field of earthquake engineering. Due to the trilinearity of the pushover curve of buildings with metallic structural fuses, the mechanism of the structural fuse is investigated through the ductility equation of a single-degree-of-freedom system, and the corresponding damage-reduction spectrum is proposed to design and retrofit buildings. Furthermore, the controlling parameters, the stiffness ratio between the main frame and structural fuse and the ductility factor of the main frame, are parametrically studied, and it is shown that the structural fuse concept can be achieved by specific combinations of the controlling parameters based on the proposed damage-reduction spectrum. Finally, a design example and a retrofit example, variations of real engineering projects after the 2008 Wenchuan earthquake, are provided to demonstrate the effectiveness of the proposed design procedures using buckling restrained braces as the structural fuses.

Tài liệu tham khảo

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