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首页> 外文期刊>Bulletin of earthquake engineering >Performance of HSC columns under severe cyclic loading
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Performance of HSC columns under severe cyclic loading

机译：HSC柱在严重循环载荷下的性能

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摘要

Experimental and analytical results of seismic investigation of high strength reinforced concrete columns performance is summarized in this paper. Twelve cantilever columns with different sizes and concrete compressive strengths were tested. The column sizes were 325 mm x 325 mm, 520 mm x 520 mm and 650 mm x 650 mm for the small, medium and large scale specimens, respectively. Concrete compressive strength was 80, 130 and 180 MPa. All specimens were designed in accordance with the Japanese design guidelines. It was noticed that spalling of cover concrete was very brittle for specimens made of 180 MPa followed by a significant decrease in strength independently of the column size. It was also observed that, while concrete compressive strength increases, the drift corresponding to the peak load decreases as well as the ductility of the specimen. Curvature was much important for the small size than for the medium size columns. Specimens with high concrete compressive strength showed a higher equivalent viscous damping at all drift angles. An equation was proposed for predicting the moment-drift envelope curves for the medium and large scale columns knowing that of the small scale columns. Experimental moment-drift and axial strain-drift histories were well predicted using a fiber model developed by the authors.
机译：总结了高强度钢筋混凝土柱抗震研究的试验和分析结果。测试了十二个不同尺寸和混凝土抗压强度的悬臂柱。小型，中型和大型样品的色谱柱尺寸分别为325 mm x 325 mm，520 mm x 520 mm和650 mm x 650 mm。混凝土的抗压强度为80、130和180MPa。所有样品均按照日本设计指南进行设计。注意到，对于180 MPa的试样，覆盖混凝土的剥落非常脆，随后强度显着下降，与柱尺寸无关。还可以观察到，虽然混凝土的抗压强度增加，但与峰值载荷相对应的漂移以及试样的延展性都降低了。曲率对于小尺寸色谱柱比对中型色谱柱重要。具有高混凝土抗压强度的样品在所有漂移角下均显示出更高的等效粘性阻尼。提出了一个方程，用于在知道小规模色谱柱的情况下，预测中大型色谱柱的矩-漂移包络曲线。使用作者开发的纤维模型可以很好地预测实验力矩漂移和轴向应变漂移的历史。

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