High strength concrete filled tube (HSCFT) columns have been used in several high-rise building projects around the world in the last decade. With very few reported experimental results on the performance of such members, this is clearly an aspect of structural engineering where practice is far ahead of the research. A limited study on circular HSCFT beam-columns, presented in this thesis, was conducted to obtain additional experimental data on the behavior of these structural elements and assess recent design code provisions with regard to circular concrete filled tube (CFT) columns. Three long beam-columns {dollar}(L/D=13.5){dollar} were tested under constant axial compression and incrementally increasing lateral displacement reversals. The level of the axial load was the main parameter investigated in this experiment. In addition, one short column was tested in concentric compression. All specimens had the same cross-sectional geometry to allow for direct comparison. Both strength and deformability issues were addressed. Various aspects of concrete confinement in circular CFTs were analyzed. A comparative study of North American and European design code provisions was carried out. The experimental results were compared with theoretical predictions of strength. (Abstract shortened by UMI.)
展开▼
机译：在过去的十年中，高强度混凝土填充管（HSCFT）柱已在世界各地的多个高层建筑项目中使用。关于这种构件性能的实验报告很少，这显然是结构工程的一个方面，实践远远超出了研究范围。本文对圆形HSCFT梁柱进行了有限的研究，以获取有关这些结构元件性能的附加实验数据，并评估有关圆形混凝土填充管（CFT）柱的最新设计规范规定。在恒定的轴向压缩和递增的横向位移反向下测试了三个长梁柱{美元}（L / D = 13.5）{美元}。轴向载荷水平是该实验中研究的主要参数。此外，对一根短柱进行了同心压缩测试。所有样品均具有相同的横截面几何形状，以便直接比较。强度和可变形性问题都得到了解决。分析了圆形CFT中混凝土限制的各个方面。进行了北美和欧洲设计规范规定的比较研究。将实验结果与强度的理论预测进行了比较。 （摘要由UMI缩短。）
展开▼
