摘要
本研究成功的进行一系列大尺寸钢骨钢筋混凝土(Steel Reinforced Concrete,SRC)矩形柱之轴压试验与反复载重抗震试验,旨在探讨新型的复合螺旋箍筋(本文称之为"五螺箍(5-Spirals)"或"尹氏螺箍(Yin′sSpi-rals)")在矩形SRC柱之使用效益。本研究的五螺箍采用自动化加工制造,具备高度经济效益,很适合用于预铸工法。此外,由于SRC柱内部之钢骨亦能够围束混凝土,有助于降低SRC柱箍筋之需求量,达到更经济的设计结果;且螺旋箍筋对混凝土之围束效果比传统水平闭合箍筋更好,亦可提升柱之强度与抗震能力。试验结果显示,SRC柱之反复载重迟滞迴圈(Hysteretic Loop)均相当饱满,试件的层间变位角(Drift Angle)高达6.0%rad,且SRC柱之强度可以持续的维持在高档。此一现象显示在6.0%rad的大变形之下,五螺箍SRC柱仍然具备十分稳定的强度,可以有效地抵抗强震引致之水平剪力,而不致于发生快速崩塌之现象。因此,五螺箍SRC柱在抗震方面具有卓越的特色,对于保障大地震来袭时之生命与财产安全有重要意义。
Presented herein is an experimental study on the axial and seismic behavior of rectangular SRC （Steel Reinforced Concrete） columns confined with a new type of multi spiral cage. Axial compression test was conducted on 11 SRC short columns, and 4 SRC columns were tested with lateral cyclic loading. The multi spiral cage is a device of five interconnected spirals, named ＂5 Spirals＂ in this study, with a large spiral at the center and four small ones at the corners. The innovation of applying the 5 spirals to rectangular SRC columns is to take its superiority in concrete confinement and its efficiency in automatic production for the precast construction industry. The major parameters of this study included the cost effectiveness of the multi-spirals, and the strength and ductility of the spirally confined rectangular SRC columns. As compared to the reinforced concrete column tied with traditional rectilinear hoops, the test results showed that, with significant cost savings of confinement steel, the SRC columns confined with 5-spirals demonstrated excellent performances in both strength and ductility.
出处
《建筑钢结构进展》
2007年第6期12-19,共8页
Progress in Steel Building Structures
