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偏压下椭圆钢管混凝土短柱力学性能研究
Authors
林沁
江汉
沈奇罕
王静峰
Publication date
1 January 2018
Publisher
Editorial Department of Progress in Steel Building Structures, Tongji University
Doi
Cite
Abstract
为了考察椭圆钢管混凝土短柱的偏压性能,通过ABAQUS有限元程序建立了椭圆钢管混凝土短柱在偏压作用下的数值分析模型,并利用试验结果验证了数值分析模型的准确性。进行了偏压作用下椭圆钢管混凝土短柱的参数分析,研究了各参数对椭圆钢管混凝土短柱最大轴压承载力、最大弯矩和延性的影响,揭示了偏压下椭圆钢管混凝土短柱的破坏模式,通过数值分析拟合了轴力-弯矩相关曲线。研究结果表明,椭圆钢管混凝土短柱在偏压作用下的破坏模式包括半高截面鼓曲破坏、半高以下截面鼓曲破坏、加载柱端双褶鼓曲破坏和柱两端双褶鼓曲破坏;影响椭圆钢管混凝土短柱最大轴压承载力和最大弯矩的主要因素为偏心距、径厚比和长短轴比,影响延性系数的主要因素为径厚比、长短轴比和混凝土强度。研究结果将为建立椭圆钢管混凝土短柱设计方法提供参考
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Last time updated on 28/12/2024