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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

41卷

期数:

2024年03期

页码:

138-148

栏目:

桥隧工程

出版日期:

2024-05-20

文章信息/Info

Title:

Dynamic analysis of new corrugated steel web composite box girder bridge

文章编号:

1673-2049(2024)03-0138-11

作者:

吴丽丽,徐胜彦,韩港豪,洪成鹏,孙培珂

(中国矿业大学(北京)力学与土木工程学院,北京 100083)

Author(s):

WU Lili, XU Shengyan, HAN Ganghao, HONG Chengpeng, SUN Peike

(School of Mechanics and Civil Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China)

关键词:

波形钢腹板组合箱梁;  FRP筋;  多尺度建模;  动力特性;  地震反应谱

Keywords:

corrugated steel web composite box girder;  FRP bar;  multi-scale modeling;  dynamic characteristic;  seismic response spectrum

分类号:

TU398

DOI:

10.19815/j.jace.2022.06002

文献标志码:

A

摘要:

对一种新型波形钢腹板组合箱梁桥结构开展了动力特性及抗震性能分析; 以鄄城黄河大桥跨中箱梁段为例,建立组合箱梁桥的多尺度有限元模型,并与实测值进行了对比,验证了多尺度模型的有效性; 基于此设计了该新型波形钢腹板组合箱梁的截面参数,采用多尺度建模方法研究了各参数变化对箱梁动力特性的影响规律,通过地震反应谱法分析了该结构在各向地震作用下的结构响应。结果表明:箱梁横隔板的数量和厚度是结构动力特性的敏感参数,对结构的扭转刚度影响很大; 增大波形钢腹板厚度可有效提高结构刚度,且刚度增大对频率的影响程度大于质量增大对频率的影响,建议腹板厚度宜设为20～30 mm; 槽形钢板可有效提高截面的抗弯刚度,尤其对结构竖向弯曲模态影响较大; 横向地震作用对混凝土顶板和横隔板应力的影响最大,纵向地震力对波形钢腹板应力的影响最大,竖向地震力对混凝土底板和槽形钢板的应力影响较大。

Abstract:

The dynamic characteristics and seismic performance analysis were conducted on a new type of corrugated steel web composite box girder bridge structure. Taking the mid-span box girder section of the Juancheng Yellow River bridge as an example, a multi-scale finite element model of the composite box girder bridge was established and compared with the measured values, and the effectiveness of the multi-scale model was verified. Based on this, the cross-section parameters of the new type of corrugated steel web composite box girder were designed, and the influence of parameter changes on the dynamic characteristics of the box girder was studied using a multi-scale modeling method. The structural response of the structure under muti-directional seismic action was analyzed using the seismic response spectrum method. The results show that the number and thickness of box girder diaphragms are sensitive parameters of structural dynamic characteristics, which have a significant impact on the torsional stiffness of the structure. Increasing the thickness of the corrugated steel web can effectively improve the structural stiffness, and the impact of stiffness increase on frequency is greater than that of mass increase. It is recommended to set the web thickness to 20-30 mm. Groove steel webs can effectively improve the bending stiffness of the cross-section, especially have a significant impact on the vertical bending mode of the structure. The transverse seismic action has the greatest impact on the stress of the concrete top plate and diaphragm, the longitudinal seismic force has the greatest impact on the stress of the corrugated steel web, and the vertical seismic force has a greater impact on the stress of the concrete bottom plate and groove steel plate.

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相似文献/References:

[1]李立峰,李铁盔.体外预应力筋极限应力增量的理论分析与试验研究[J].建筑科学与工程学报,2015,32(01):27.
　LI Li-feng,LI Tie-kui.Theoretical Analysis and Experiment Study on Ultimate Stress Increment of Externally Prestressed Tendons[J].Journal of Architecture and Civil Engineering,2015,32(03):27.
[2]朱 鹏,许家婧,屈文俊.混合配筋混凝土梁抗弯疲劳试验[J].建筑科学与工程学报,2019,36(04):55.
　ZHU Peng,XU Jia-jing,QU Wen-jun.Experiment on Fatigue Flexural Behaviors of Hybrid Reinforced Concrete Beams[J].Journal of Architecture and Civil Engineering,2019,36(03):55.
[3]屈文俊,刘传名,朱 鹏.加筋混凝土梁延性系数计算方法[J].建筑科学与工程学报,2019,36(06):10.
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备注/Memo

备注/Memo:

收稿日期:2022-06-02
基金项目:国家自然科学基金项目(51678564); 中国矿业大学(北京)越崎杰出学者奖励计划项目(2602021RC59);中国矿业大学(北京)大学生创新训练项目(202106051)
作者简介:吴丽丽(1977-),女,工学博士,教授,博士生导师,E-mail:jennywll@163.com。

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更新日期/Last Update: 2024-05-20