文档介绍：摘要脚手架在工程建设中的应用相当普遍,但脚手架事故频发,脚手架可靠性和经济性之间的关系越来越受到重视。本文主要以扣件式钢管脚手架为主要研究对象,系统地分析和总结了国内外研究现状及发展趋势,并在施工现场调研和他人试验研究成果的基础上,对扣件式钢管脚手架的稳定承载能力、体系可靠度等问题进行了研究和讨论。本文的主要研究成果概述为: 结合近几年脚手架方面的安全事故,分析和论述脚手架事故发生的主要原因,提出相应的预防措施,以达到安全施工的目的。对比和讨论了国内外对各类型脚手架的计算方法,在此基础上推论出适合扣件式脚手架的整体计算方法。基于国内扣件抗扭性能的试验研究成果,并以脚手架整架加荷试验中的架体为原型,在有限元软件中建立脚手架的半刚性和初始材料缺陷的三维计算模型,利用该模型进行线性和非线性屈曲分析。采用蒙特卡罗数值模拟法,建立扣件式脚手架稳定系数分布概率模型的方法。在此基础上参考现有相关研究成果并建立脚手架荷载和抗力的概率模型, 对实际工程进行可靠度的计算,得到实际工程的可靠度指标,并与规范做了比较。通过完成一系列有限元法分析结果,为脚手架承载力研究及可靠性分析提供依据,对扣件式脚手架的搭设和施工提出几点建议,并对工作中的得到的成果和不足进行了总结和展望。关键词:扣件式钢管脚手架、半刚性连接、结构可靠度、初始缺陷、非线性屈曲、稳定承载力、蒙特卡罗法模拟 ReliabilityAnalysis ofSteelTubular ScaffoldwithCouplers Wang Yanhua(StrLlctI】ra】Engineering) D慨ted by Qingzhi Abstract Withtherapidgrowth of China’S economic andtheincreasing demand of Construction progress,the reliability ofscaffoldduring building construction es one ofthemostimportant research areas oncivilen百neering which have a difficulty and thispaper,thereliability of steeltubularscaffoldduring building construction was studied 011the stateofthescaffoldsystem,the research works on previous studies included:stability bearing capability ofscaffoldand system reliability contents issummarized asfollows. Make fullofexperience ofprevious accidents,the paper analyzes the causes, andpropose some appropriate preventive thebasis parison and discussionofthe calculation method foralltypes ofscaffolding athome and abroad,the overall calculation ofthe steeltubularscaffold on experimental studiesof anti-torsion performance offasteners,a three—dimensional finiteelement modes was established to consider the influence ofsemi一一百d connection and the linearand nonlinear bucking analysis were proceeded. Using Monte-Carlo numerical simulation method,t scaffoldstability factor distributionprobability model toexisting research,and using theprobabilistic models forloads and resistance ofscaffold,the