2013年6月上 施工技术 第42卷第11期 CONSTRUCTION TECHNOLOGY 27 D01:10.7672/sgjs2013110027 钢管负公差和初弯曲对脚手架受压 钢管稳定性影响分析* 张鹏程，曹平周，伍凯 (河海大学土水与交通学院，江苏南京210098) [摘要]脚手架的钢管按国家标准允许存在公差和初弯曲.为了研究负公差和初弯曲对脚手架构件稳定承载力的 影响，采用我国现行规范《钢管脚手架安全技术规范》JGJ130一2011中的计算方法，计算得到负公差会造成构件轴 压承载力下降10.24%~12.59%，负公差和初弯曲共同作用时承载力下降12.17%-15.28%.为了减小负公差和 初弯曲对脚手架立杆承载力的不利影响，建议提高脚手架钢管精度，使得外径负公差限值为0.3mm 壁厚负公差限 值为5%t 初弯曲限值为1%ol [关键词]脚手架；钢管；负公差；初弯曲；稳定性 [中图分类号]TU731.2 [文献标识码]A [文章编号]1002-8498(2013)11-0027-04 Analysis to the Impact of Negative Tolerances and Out-of-straightness of Steel Pipes on the Stability of Scaffold Zhang Pengcheng Cao Pingzhou Wu Kai College of Civil and Transportation Engineering Hohai University Nanjing Jiangsu 210098 China) Abstract:The steel pipes of scaffold are allowed to have certain tolerances and initial out-of-straightness according to national standards.In order to study the influence of negative tolerances and initial out-of- straightness on the stability of scaffold members this paper uses the method proposed in Technological specification for the safety of steel pipe scaffold JGJ130-2011.The calculation shows that co-existing negative tolerances of out diameter and pipe thickness reduce the axial bearing capacity by 10.24%~ 12.59%.Combination of negative tolerances and initial out-of-straightness reduces the carrying capacity by 12.17%~15.28%.To abate the adverse influence it is suggested that the fabrication accuracy of scaffold pipes should be improved and the tolerances for out diameter tube th...
钢管负公差和初弯曲对脚手架受压钢管稳定性影响分析.pdf
