[1]熊咸玉,戴 俊.大跨度现浇连续箱梁满堂支架结构稳定性分析及评价[J].西安科技大学学报,2020,(02):268-274.
 XIONG Xian-yu,DAI Jun.Stability analysis and evaluation of full-frame support structure for long-span cast-in-situ continuous box girder[J].Journal of Xi'an University of Science and Technology,2020,(02):268-274.
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大跨度现浇连续箱梁满堂支架结构稳定性分析及评价(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2020年02期
页码:
268-274
栏目:
出版日期:
2020-03-30

文章信息/Info

Title:
Stability analysis and evaluation of full-frame support structure for long-span cast-in-situ continuous box girder
文章编号:
1672-9315(2020)02-0268-07
作者:
熊咸玉戴 俊
(西安科技大学 建筑与土木工程学院,陕西 西安 710054)
Author(s):
XIONG Xian-yuDAI Jun
(College of Civil and Architectural Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)
关键词:
满堂支架 大跨度现浇连续箱梁 理论计算 数值模拟 稳定性分析
Keywords:
full-frame support large span cast-in-situ continuous box girder theoretical calculation numerical simulation stability analysis
分类号:
U 445; U 445.4
文献标志码:
A
摘要:
为了对满堂支架进行具体的设计和简化验算,以西安地铁五号线大跨度现浇连续箱梁施工为例,采用经典结构力学理论对满堂支架结构进行稳定性分析,其中箱梁梁体及其上部荷载计算单元运用切割法进行划分,并采用Midas的数值模拟验证切割计算方法的准确性,进一步提出满堂支架施工的控制要点。结果表明:满堂支架竹胶板、纵横向方木强度、刚度、立杆稳定性及地基承载力均在允许范围之内,其横向方木的最大应力为1.164~1.49 MPa,最大挠度为0.011~0.023 mm,纵向方木的最大应力为5.567~5.57 MPa,最大挠度为0.025~0.026 mm,立杆的最大应力值为102.278~115.98 MPa,满堂支架的整体抗倾覆系数为11.2~37.5,满足规范的要求,且数值模拟的结果与理论分析基本吻合,说明满堂支架具有较好稳定性,切割计算方法较为准确,具有计算快捷、计算灵活等优点,可为类似工程支架设计、验算及施工提供参考和借鉴。
Abstract:
In order to design and simplify the checking calculation of the full-frame support,taking the construction of large-span Cast-in-situ Continuous Box Girder of Xi'an Metro Line 5 as an example,the stability analysis of the full-frame support structure is carried out by using classical structural mechanics theory.The box girder and its upper load calculation unit are divided by cutting method,Midas numerical simulation is used to verify the accuracy of the cutting calculation method,and the control points of full support construction are further proposed.The results show that the strength,stiffness,stability of vertical and transverse timber and bearing capacity of foundation are all within the allowable range.The maximum stress of transverse timber is 1.164~1.49 MPa,the maximum deflection is 0.011~0.023 mm,the maximum stress of longitudinal timber is 5.567~5.57 MPa,and the maximum deflection is 0.025~0.026 mm.The maximum stress value of the vertical pole is 102.278~115.98 MPa,and the overall anti-overturning coefficient of the full support is 11.2~37.5,which meets the requirements of the code.The results of numerical simulation are basically consistent with the theoretical analysis,which shows that the full-frame support are good in stability,accurate in cutting calculation method,fast and flexible in calculation as well asother advantages.It can provide reference for similar engineering support design,checking calculation and construction.

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备注/Memo

备注/Memo:
收稿日期:2019-05-20 责任编辑:李克永
基金项目:国家自然科学基金(51174159,59974019); 中国博士后基金(2015M572580); 陕西省教育厅专项科学研究项目(15JK1471)
更新日期/Last Update: 2020-03-30