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为研究轴压比、配箍率、箍筋连接形式的变化对混凝土柱裂缝发展的影响,以5根高轴压比、高强混凝土柱试件为研究对象,施加低周反复水平载荷进行拟静力试验,对各试件的破坏形态、混凝土裂缝发展进行研究.结果表明:高强混凝土柱在反复水平载荷作用下先出现水平细小裂缝,随着水平位移加大出现斜向裂缝,并逐渐加长、贯通、加粗,最终柱脚混凝土压碎,发生弯曲破坏;柱达到极限破坏时,大部分纵筋屈服或溢出,部分箍筋屈服;配箍率大、采用焊接环式箍筋的试件承载力较大、耗能大,延性好.
In order to study the influence of axial compression ratio, stirrup ratio and stirrup connection on the crack development of concrete columns, five specimens with high axial compressive ratio and high strength concrete columns were selected as the research objects. The results show that the horizontal cracks appear in the high-strength concrete columns under the repeated horizontal loads, and oblique cracks occur with the increase of the horizontal displacement and gradually increase, Most of the longitudinal reinforcement yield or overflow, some of the stirrup yield; With the hoop rate, the use of welding ring stirrups specimen load-bearing Greater power, energy consumption, good ductility.