| 碳钢和不锈钢管状支撑构件循环试验和数值模型 |
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| 引用本文： | K.H.Nip,L.Gardner,A.Y.Elghazouli. 碳钢和不锈钢管状支撑构件循环试验和数值模型[J]. 钢结构, 2010, 0(3) |
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| 作者姓名： | K.H.Nip L.Gardner A.Y.Elghazouli |
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| 摘 要： | 为了研究由热轧碳钢、冷弯碳钢、冷弯不锈钢三种材料所构成的管状支撑构件的响应,在轴向循环荷载下,进行了16个方形、长方形空心截面构件的试验,对三种材料试件的荷载-位移滞回响应、抗压强度、侧向挠度、能量耗散、断裂寿命进行研究。此外,采用有限元模型验证试验结果,并基于应变破坏预测方法进行参数研究。研究表明:现有的预测抗压屈曲、屈曲后抗压强度的经验公式可同时用于碳钢和不锈钢试件。然而,构件延性和长细比之间的关系不能代表整体的长细比,亦不能用于冷弯不锈钢构件。对于每种材料,考虑整体和局部长细比,提出新的公式。对于不同的材料,整个加载周期的切线刚度不同,这是决定局部屈曲阻力、循环次数、支撑破坏的关键因素。
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| 关 键 词： | 支撑构件 屈曲 循环荷载 延性 能量耗散 疲劳 断裂寿命 空心截面 不锈钢 钢 |
Cyclic Testing and Numerical Modelling of Carbon Steel and Stainless Steel Tubular Bracing Members |
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| K.H.Nip,L.Gardner , A.Y.Elghazouli. Cyclic Testing and Numerical Modelling of Carbon Steel and Stainless Steel Tubular Bracing Members[J]. Steel Construction, 2010, 0(3) |
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| Authors: | K.H.Nip L.Gardner A.Y.Elghazouli |
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| Abstract: | In order to study the response of tubular bracing members of three structural materials-hot-rolled carbon steel,cold-formed carbon steel and cold-formed stainless steel-a total of 16 square and rectangular hollow section members were tested under cyclic axial loading.The load-displacement hysteretic response,compressive resistance,lateral deflection,energy dissipation and fracture life of the specimens of these three materials were investigated.In addition,finite element models,verified against the experi-m... |
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| Keywords: | Bracing member Buckling Cyclic loading Duc-tility Energy dissipation Fatigue Fracture life Hollow section Stainless steel Steel |
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