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Earthquakes and Structures Volume 17, Number 4, October 2019 , pages 399-409 DOI: https://doi.org/10.12989/eas.2019.17.4.399 |
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Pseudo-dynamic and cyclic loading tests on a steel-concrete vertical hybrid structure |
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Bo Wang, Tao Wu, Huijuan Dai, Guoliang Bai and Jian Wu
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| Abstract | ||
| This paper presents the experimental investigations on the seismic performance of a peculiar steel-concrete vertical hybrid structural system referred to as steel truss-RC tubular column hybrid structure. It is typically applied as the supporting structural system to house air-cooled condensers in thermal power plants (TPPs). Firstly, pseudo-dynamic tests (PDTs) are performed on a scaled substructure to investigate the seismic performance of this hybrid structure under different hazard levels. The deformation performance, deterioration behavior and energy dissipation characteristics are analyzed. Then, a cyclic loading test is conducted after the final loading case of PDTs to verify the ultimate seismic resistant capacity of this hybrid structure. Finally, the failure mechanism is discussed through mechanical analysis based on the test results. The research results indicate that the steel truss-RC tubular column hybrid structure is an anti-seismic structural system with single-fortification line. RC tubular columns are the main energy dissipated components. The truss-to-column connections are the structural weak parts. In general, it has good ductile performance to satisfy the seismic design requirements in high-intensity earthquake regions. | ||
| Key Words | ||
| steel-concrete hybrid structure; seismic performance; failure mechanism; pseudo-dynamic test; cyclic loading test | ||
| Address | ||
| Bo Wang, Tao Wu: School of Civil Engineering, Chang\'an University, Xi\'an 710061, China Huijuan Dai: School of Civil Engineering, Xi\'an University of Science and Technology, Xi\'an 710054, China Guoliang Bai: School of Civil Engineering, Xi\'an University of Architecture and Technology, Xi\'an 710055, China Jian Wu: Shaanxi Key Laboratory of Safety and Durability of Concrete Structures, Xijing University, Xi\'an, 710123, China | ||