中文摘要：

通过10个高强箍筋约束高强混凝土柱在高轴压比下的低周反复水平加载试验，研究该类构件的破坏过程、破坏形态、滞回曲线和延性性能，分析箍筋的应力及其强度发挥水平，并与普通强度箍筋的约束效果进行对比。结果表明，在高轴压比下，该类型柱的滞回曲线仍呈稳定丰满的梭形，具有较好的延性性能、耗能能力和较强的抗倒塌能力，即密配高强箍筋是保证高强混凝土框架柱在高轴压比下具有良好延性性能以及提高其轴压比限值的有效措施；大部分试件破坏时，其高强箍筋已经屈服，箍筋强度可以得到比较充分的发挥，从而达到比较好的约束效果；此外，在同等条件下与普通强度箍筋柱相比，高强箍筋高强混凝土柱其滞回曲线较为丰满、稳定，有较大的塑性耗能能力，延性显著增加，约束效果明显优于普通箍筋。

英文摘要：

A total of 10 high-strength concrete （HSC） columns confined by high-strength complex stirrups were tested under cyclic lateral force and a higher constant axial loading. The failure process, failure modes, characteristics of hysteresis loop and ductility are observed, the stress level of the transverse reinforcement is evaluated, and the specimens are compared with those confined with normal strength stirrups. The results indicate that the hysteresis loop of this type of columns still shows plump spindle-shape at higher axial compression ratio, with better ductility, energy dissipation capability and stronger anti-collapse ability. Setting closely spaced high-strength stirrups is an effective measure to ensure HSC column ductility and to enhance the axial compression ratio limit. The high-strength stirrups yielded when most of the specimens are destroyed, which indicates that the strength of stirrups can be fully developed to achieve better constraint effect than with the normal strength stirrups, so that the HSC columns confined with high-strength stirrups may exhibit better seismic performance.