矩形混凝土柱新的约束型式之研发(Ⅱ)外方内圆、组合螺箍及其衍生型式
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摘要
与方箍相较 ,螺箍具有较佳的约束作用 ,然碍于形状因素一般以圆柱应用为主 ,其在矩形柱的应用有其形状上及行为上的问题待克服。本研究以组合螺箍的方式 ,探讨不同组合螺箍及其变化方式的轴压行为 ,成功地将螺箍应用于矩形柱。文中试件的约束多以螺箍为主 ,以组合多组螺箍或配合其它固定筋或衍生变化等方式 ,配置螺箍于矩形柱中 ,并透过 15组大尺寸高强度混凝土 (60cm× 60cm× 12 0cm)试件轴压试验行为 ,探讨其约束方式的可行性。试验结果显示螺箍也可在矩形柱中发挥优异的约束效果 ,大幅提升试件行为。
Spiral hoops are generally believed to have better confined effects in concrete than rectangular hoops. They are always used in circular members for geometric reasons. In order to apply the spiral hoops to rectangular members, axial compression tests of 15 full-scaled specimens with difference combinations of spiral hoops were carried out in the past year. High performance concrete with 700 kg/cm2 in compression strength was also used in these specimens. Tests results showed that spiral hoops can be successfully used in rectangular concrete by suitable combinations, and the behaviors are even better than traditional rectangular specimens.
Spiral hoops are generally believed to have better confined effects in concrete than rectangular hoops. They are always used in circular members for geometric reasons. In order to apply the spiral hoops to rectangular members, axial compression tests of 15 full-scaled specimens with difference combinations of spiral hoops were carried out in the past year. High performance concrete with 700 kg/cm2 in compression strength was also used in these specimens. Tests results showed that spiral hoops can be successfully used in rectangular concrete by suitable combinations, and the behaviors are even better than traditional rectangular specimens.
引文
[1] 尹衍,矩形混凝土柱新的约束型式之研发(I)一笔箍、格网箍筋及电焊方箍,土木工程学报,2004年8月
[2] 蔡克铨,刘俊谷,实尺寸矩形RC桥柱钢板补强试验及分析,台湾地震工程研究中心报告,2002
[3] 叶芳耀(张国镇指导),碳纤围束混凝土柱轴压强度与极限应变之影响因子研究,博士论文,台湾大学土木工程研究所2003年6月
[2] 蔡克铨,刘俊谷,实尺寸矩形RC桥柱钢板补强试验及分析,台湾地震工程研究中心报告,2002
[3] 叶芳耀(张国镇指导),碳纤围束混凝土柱轴压强度与极限应变之影响因子研究,博士论文,台湾大学土木工程研究所2003年6月
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