论文类型：期刊论文
发表时间：2020-09-01
发表刊物：Journal of Constructional Steel Research
收录刊物： EI  
文献类型：J
期号：172
页面范围：106231
ISSN号：0143-974X
关键字：Lattice boom Second-order analysis Local stability Effective length factor Initial imperfection
摘要：Lattice booms, used in mobile cranes, are welded using slender high-strength steel tubes, and their carrying capacity is determined through the local stability of the chords. However, of the two methods for calculating it, the overall stability formula of axially compressed members is too conservative, and geometrically nonlinear analysis with imperfections is too complicated to apply. To achieve a more accurate and simple calculation of the local chord stability, a second-order analysis considering restraint from web members and initial geometric imperfections is proposed. This study demonstr
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