Research on equivalent static stiffness of arch foot of continuous rigid frame composite arch bridge

KANG Juntao; ZOU Li; LIAN Yuequan

doi:10.13471/j.cnki.acta.snus.2019.11.13.2019B115

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Research on equivalent static stiffness of arch foot of continuous rigid frame composite arch bridge

Research articles | 更新时间：2023-11-01

- Research on equivalent static stiffness of arch foot of continuous rigid frame composite arch bridge
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 61, Issue 2, Pages: 125-130(2022)
- 作者机构：
  
  武汉理工大学土木工程与建筑学院，湖北武汉430070
- 作者简介：
- 基金信息：
- DOI：10.13471/j.cnki.acta.snus.2019.11.13.2019B115
  CLC： U441.5
- Published：25 March 2022，
  
  Published Online：10 November 2020，
  
  Received：13 November 2019，
  
  Accepted：05 February 2020
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康俊涛,邹立,连岳泉.连续刚构拱组合桥拱脚等效静力刚度研究[J].中山大学学报(自然科学版),2022,61(02):125-130.

KANG Juntao,ZOU Li,LIAN Yuequan.Research on equivalent static stiffness of arch foot of continuous rigid frame composite arch bridge[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(02):125-130.
康俊涛,邹立,连岳泉.连续刚构拱组合桥拱脚等效静力刚度研究[J].中山大学学报(自然科学版),2022,61(02):125-130. DOI： 10.13471/j.cnki.acta.snus.2019.11.13.2019B115.

KANG Juntao,ZOU Li,LIAN Yuequan.Research on equivalent static stiffness of arch foot of continuous rigid frame composite arch bridge[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(02):125-130. DOI： 10.13471/j.cnki.acta.snus.2019.11.13.2019B115.

摘要

在连续刚构拱组合桥的全桥有限元建模分析中，拱脚单元的合理建立至关重要。为得到连续刚构拱组合桥拱脚的等效静力刚度，文章以福厦铁路江坑内大桥为工程背景，采用Midas Civil和Midas FEA分别建立了拱脚杆系模型和拱脚实体模型以计算拱肋位移并进行对比分析，得到了该桥拱脚的等效静力刚度，并分析了拱脚等效静力刚度对全桥受力性能的影响。结果表明：连续刚构拱组合桥拱脚合理静力刚度为拱肋刚度的15 ~ 25倍，在考虑拱脚等效静力刚度的情况下，靠近拱脚附近吊杆的成桥吊杆力明显减小，最大达35.3 kN，而靠近中跨跨中附近的吊杆的成桥吊杆力呈增大趋势，但效应不明显；主力组合下，拱肋挠度在0 ~ 1/4

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1.60866666

2.28600001

（拱肋跨度

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）范围内呈减小趋势，而在1/4

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1.60866666

2.28600001

~1/2

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1.60866666

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内为增大趋势，对同类型桥梁的设计具有一定的参考价值。

Abstract

In full-bridge finite element modeling analysis of continuous rigid frame composite arch bridge， the rational establishment of the arch unit is very important. In order to investigate equivalent static stiffness of arch foot of continuous rigid frame composite arch bridge， the local entity model and local truss model of the arch foot are established by Midas Civil and Midas FEA by taking Jiangkengnei Bridge of Fuzhou-Xiamen Railway as the research object. The displacement of arch rib is compared and analyzed. Finally， the influence of the equivalent static stiffness of arch foot on force performance of the bridge is analyzed. The results show： the reasonable equivalent static stiffness of the arch of continuous rigid frame composite arch bridge is 15 ~ 25 times the stiffness of the arch rib. With the consideration of the equivalent static stiffness， the force of hanger rods of the bridge near the arch is significantly reduced. The maximum internal force is 35.3 kN， and the force of hanger rods near the middle span is increasing， but it’s not obvious； under the main force combination， the deflection of the arch ribs decreases in the range of 0 ~1/4

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2.11666679

2.62466669

（arch rib span

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）， but increases within 1/4

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2.11666679

2.62466669

~1/2

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2.11666679

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.It has reference value for the design of bridges of the same type.

关键词

连续刚构拱组合桥等效静力刚度数值计算受力性能

Keywords

continuous rigid frame composite arch bridgeequivalent static stiffnessnumerical calculationforce performance

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周萌，宁晓旭，聂建国. 系杆拱桥拱脚连接结构受力性能分析的多尺度有限元建模方法［J］. 工程力学， 2015， 32（11）：150-159.

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杨志雄，武维宏，舒春生. 祁家黄河大桥拱座节点局部应力分析［J］. 铁道建筑， 2008（12）：7-9.

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陈丽军，胡宁，李运，等. 某连续刚构桥0号块局部应力分析［J］. 公路工程， 2015（5）：228-230.

杨进，罗永，罗学成. 连续刚构0号块的空间应力分析［J］. 公路， 2011（6）：90-94.

孙洪亮，王慧东. 松花江大桥0#块空间应力分析［J］. 石家庄铁道大学学报（自然科学版）， 2007， 20（2）：22-25.

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