中文摘要：

通过31根高强螺旋箍筋约束高强混凝土方形截面柱的轴心受压试验，对该类型柱的破坏形态、应力．应变关系曲线等进行了研究，分析了箍筋强度、箍筋间距、箍筋形式及截面尺寸对其性能的影响。结果表明：采用高强箍筋约束是防止高强混凝土应力．应变曲线陡然下降的有效措施；箍筋间距较小、强度较高、形式较复杂的约束混凝土试件，其应力．应变曲线的下降段较为平缓，显示出良好的延性性能；体积配箍率对约束混凝土强度和延性提高程度的影响要明显大于箍筋强度，当ρv·fyv相近时，高配箍率低强度箍筋试件的性能要好于低配箍率高强度箍筋试件；约束混凝土达到峰值强度时，高强箍筋并未屈服，其强度的富裕量可保证约束混凝土试件在达到极限破坏状态之前具有良好的延性性能。在该文试验的基础上，结合国内外试验数据，通过回归分析提出了高强箍筋约束高强混凝土峰值强度和极限应变的计算公式。

英文摘要：

On the basis of concentric loading tests of 31 HSC columns confined by high-strength stirrups, this paper evaluated the influences of tie yield strength, tie spacing, and tie configuration. The results show that high strength concrete confined by high-strength stirrups exhibits better strength and ductility, and using high-strength stirrups is an effective measure to prevent the stress-strain curve from descending sharply; confined concrete with close spacing, high-strength and complex tie configuration exhibits higher carrying capacity and improved ductility; additionally, with the same value Ofpv ＂fy~, specimens with higher volumetric ratios of ordinary tie yield strength have better performance than those with lower volumetric ratios of high-grade tie yield strength; transverse reinforcement with high strength does not yield at peak strength, thus the high strength can be used as a safety margin to ensure good ductility of confined concrete prior to the ultimate failure. Based on the test data worldwide, the formulas to determine the peak strength and ultimate strain of high-strength concrete confined by high-strength stirrups are proposed.