某超高钢桅杆结构考虑纤绳偶然失效后的动力响应分析  

Dynamic Response Analysis of a Super-High Steel Guyed Mast Structure Under Accidental Failure of Guys

作　　者：孙永良[1] 

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海200092

出　　处：《特种结构》2015年第3期33-37,43,共6页Special Structures

摘　　要：纤绳是桅杆结构的重要组成部分,给杆身提供侧向刚度。实际工程中纤绳可能因为拉耳疲劳破坏或其它偶然因素而失效,从而对结构整体产生动力效应。为研究纤绳偶然失效后对桅杆结构造成的影响,以某350m高气象桅杆为研究对象,采用通用有限元软件ANSYS,运用生死单元法,逐一分析了各层纤绳中有一根发生偶然失效后的动力响应。分析表明,纤绳突然失效对桅杆的动力作用明显,严重者导致结构破坏,实际设计中应予以考虑。Guys are important parts of a guyed mast,providing lateral rigidity for the mast.However the guys may fracture due to occasional factors such as fatigue failures of joint plates,causing dynamic effects to the structure.In order to investigate the safety of a guyed mast subjected to a sudden guy rupture,a FE model of a350m-tall guyed mast was established with the ANSYS software.The model was analyzed with one failed guy in each level.Analytical results show that the dynamic effect is obvious even causing failure of the structure and cannot be neglected in design.

关 键 词：桅杆 纤绳失效 动力效应 非线性分析 生死单元 

分 类 号：TU347[建筑科学—结构工程] TU311.3