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Behaviour of high strength rectangular concrete-filled steel hollow section columns under eccentric loading

机译：偏心荷载下高强度矩形钢管混凝土空心截面柱的受力性能

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摘要

This paper presents an experimental study on the behaviour of 12 high strength rectangular concrete-filled steel hollow section columns subjected to eccentric loading. The primary test parameters were the cross-sectional aspect ratio, slenderness and load eccentricity. The specimens with cross-sectional aspect ratios of 1.0, 1.5 and 2.0 were fabricated from high strength materials (f_y = 550 MPa; f_(cu) = 70.8 and 82.1 MPa). The slenderness ratios of the specimens were 20 and 50, while the load eccentricity ratios (e/B; e is the load eccentricity, B is the breadth of cross-section) varied between 0.17 and 0.40. Favourable ductility performance was observed for all specimens during the test. The experimental ultimate capacities of the specimens were compared with the design strengths predicted by the codes. Comparison of results showed that Eurocode 4 overestimated the ultimate capacities of the columns with a difference of 3%. ACI and AISC, on the other hand, conservatively predicted the failure loads by 11% and 25%, respectively.
机译：本文对12根高强度矩形钢管混凝土空心截面柱在偏心荷载下的性能进行了实验研究。主要测试参数为横截面纵横比，细长度和负载偏心率。用高强度材料（f_y = 550 MPa； f_（cu）= 70.8和82.1 MPa）制造横截面纵横比为1.0、1.5和2.0的样品。样品的细长比为20和50，而载荷偏心率比（e / B； e为载荷偏心率，B为横截面宽度）在0.17和0.40之间变化。在测试过程中，所有样品均观察到良好的延展性能。将样品的实验极限容量与规范预测的设计强度进行了比较。结果比较表明，欧洲规范4高估了色谱柱的最终容量，相差3％。另一方面，ACI和AISC保守地预测失效载荷分别为11％和25％。

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