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圆、方形空心钢管混凝土柱抗震性能试验研究

DOI: 10.13197/j.eeev.2014.02.129.wanghw.017, PP. 129-136

Keywords: 钢管混凝土,低周反复荷载,滞回曲线,骨架曲线,延性

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Abstract:

完成了12个空心钢管混凝土柱滞回性能试验。研究轴压比、空心率及截面形式对试件的滞回曲线、骨架曲线及延性系数的影响,分析规程《实、空心钢管混凝土结构设计规程》(CECS254-2011)中轴压比的合理限值。研究结果表明(1)轴压比和空心率越大,空心钢管混凝土滞回性能越差。与方形截面形式相比,圆形空心钢管混凝土具有更好的滞回性能;(2)试件一致在底部发生核心混凝土被压碎和外钢管鼓曲破坏。轴压比越大,试件底部鼓曲越明显;空心率越小,试件底部鼓曲越明显。最后,给出了不同空心率情况下,圆形空心钢管混凝土柱轴压比的限值。

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