英文摘要 |
Many studies had showed that RC columns lap-spliced at the plastic hinge zone exhibit poor ductility, even directly applied with CFRP or steel jacket. In order to solve the problem, a new retrofit method, the Carbon fiber-Steel plate retrofit method(CS retrofit method), is proposed to improve the confinement effect while keeping the original cross section almost intact. According to the experimental and analysis results, design formulas for the CS retrofit method are proposed. Beside, for a rectangular column confined by multi-spirals, a simplified finite element analysis procedure is proposed to analyze the axial compressive behavior. Good agreement is found between the analysis and experimental results. |