| Summary: | 碩士 === 國立成功大學 === 土木工程學系 === 106 === The study presents the seismic evaluation of columns based on the proposed stress and strain model for confined concrete used in New RC column. Furthermore, the load and displacement relationship of New RC column with flexural failure mode can be analyzed by conducting the moment-curvature analysis. Finally, the cyclical loading test of three New RC columns were carried out, and the corresponding backbone curves are compared to the simulated pushover curves with good accuracy.
Then, the proposed stress and strain model for confined concrete is used in New RC column design, and the use of New RC in place of normal strength concrete bridge columns is discussed. In addition, the influence of the strain rate caused by the velocity pulse from the near-fault earthquakes on the material behavior when the bridge structure is located near the fault is discussed, and the design results of the bridge structures in the near-fault are compared with the far field.
Examining the difference between the two cases, it is finally possible to reach to the conclusion that high strength materials can indeed be more economical than normal strength materials. In addition, from the analysis results, it can be known that if the existing bridge is adjacent to the fault zone and the seismic performance check is performed, as well as the contribution of strain rate, the original structural can be resistant to near-fault earthquakes.
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