城市高架叠跨段组合型模板支架稳定性分析

摘要

In order to evaluate the overall stability of cast-in-place box girder formwork bracket,the composite scaffolds of Zhongzhou Avenue and north tricyclic cross-overlap segment in Zhengzhou Sanhuan elevated rapid project were selected as the research object,and midas civil was used for finite element analysis.The analysis results show that the overall stability of the support bracket of West Amplitude Bridge is the lowest,but the o-verall stability coefficient still reaches 2.48.The overall stability of the formwork support is greatly affected by the section size and step length of the steel pipe.It is recommended that the unqualified rod be rejected before inspection.When the step size increases from the original design 800mm to 1200mm,the overall stability fac-tor of the bracket can still be guaranteed to reach 2.21.%为评价现浇箱梁模板支架的整体稳定性,以郑州市三环高架快速化工程中州大道与北三环交叉叠跨段组合型支架为研究对象,采用midas civil进行有限元分析.结果表明:西幅桥地承支架整体稳定性最低,但整体稳定系数仍达到2.48;模板支架的整体稳定性受钢管截面尺寸和步距影响较大,建议施工前应通过检查剔除不合格杆件;当步距由原设计800 mm增加到1 200 mm时,支架整体稳定系数仍可达到2.21.