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某变截面塔机转换节受力性能分析

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变截面塔式起重机的转换节部位通常较为薄弱,易导致结构失效.为进行某转换节的试验研究并考虑试验场地尺寸的限制,对该转换节完整结构的受力性能进行有限元分析,并提出两种试验方案:即1/2结构和1/4结构试验方案,研究两个试验模型的极限承载力与破坏模式,并与转换节完整结构的分析结果进行对比,从而确定合理的试验方案.结果表明转换节完整结构因上角柱Z1达到材料屈服强度而破坏;1/2结构可以更好地复现转换节完整结构的受力性能,为该转换节的试验研究及变截面塔机设计提供重要参考.
ANALYSIS OF THE MECHANICAL PERFORMANCE OF THE CONVERSION SECTION OF A VARIABLE CROSS-SECTION TOWER CRANE
The conversion section of the variable cross-section tower crane is usually weak,which is easy to lead to structural failure. Before the experimental study of a conversion section with the limitation of the size of the testing site,the finite element analysis of the mechanical performance of the complete structure of the conversion section is carried out. Two schemes with the test protocol of 1/2 structure and 1/4 structure are proposed,the ultimate bearing capacity and failure mode of which are studied. The analysis results of the complete structure of the conversion sec-tion are compared to determine a reasonable test scheme. The results show that the complete structure of the conver-sion section is damaged when the upper corner column Z1 reaches the yield strength of the material. The 1/2 struc-ture form better reproduce the mechanical performance of the complete structure of the conversion section than that of 1/4 structure form,providing the reference for the experimental research of the conversion section and the design of the variable cross-section tower crane.

variable cross-section tower craneconversion section of the tower craneultimate load-bearing capacity

李若彤、曹正峰、李玲、郑朝荣

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东北林业大学土木与交通学院,哈尔滨150040

中建机械有限公司,河北廊坊065000

哈尔滨工业大学结构工程灾变与控制教育部重点实验室,哈尔滨150090

变截面塔机 塔机转换节 极限承载力

中建二局科技项目

2021ZX080001-02

2024

低温建筑技术
黑龙江省寒地建筑科学研究院

低温建筑技术

影响因子:0.237
ISSN:1001-6864
年,卷(期):2024.46(4)
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