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工程力学  2015 

几何缺陷影响下的CFRP-方钢管极限承载力解析解

DOI: 10.6052/j.issn.1000-4750.2014.05.S025, PP. 322-326

Keywords: 结构工程,方钢管,极限承载力,屈曲分析,初始几何缺陷

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Abstract:

该文利用计算压弯钢构件弹塑性失稳的Je?ek法,推导了受轴心压弯外力作用下具有初始几何缺陷且翼缘两侧分别粘贴碳纤维片后的方钢管构件失稳时极限荷载的计算公式。通过采用数值分析法,结合非线性屈曲理论,进行了受初始几何缺陷影响的碳纤维增强方钢管构件的屈曲分析,并得到极限承载力的数值解。将数值分析结果与Je?ek法得到的解析解进行比对,可以发现两种计算结果吻合的较好。由计算结果可知,当给定弯矩值时,三种构件当中碳纤维增强后的构件极限承载力始终保持较高数值。给定弯矩较小时,裸钢构件的极限承载力要高于考虑缺陷的碳纤维增强后的构件。当弯矩逐渐增加,其前者的极限承载力降低速度要快于后者。

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