[1]吴斐璠,李朋朋,单世纪,等.公路匝道跨线桥预应力混凝土等高度连续梁支架承载力分析[J].华南地震,2026,46(05):88-98.[doi:10.13512/j.hndz.2026.05.11]
　WU Feifan,LI Pengpeng,SHAN Shiji,et al.Analysis of the Bearing Capacity of Prestressed Concrete Continuous Beam Supports with Equal Height for Highway Ramp Overpass Bridges[J].,2026,46(05):88-98.[doi:10.13512/j.hndz.2026.05.11]
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公路匝道跨线桥预应力混凝土等高度连续梁支架承载力分析()

华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
46
期数:
2026年05期
页码:
88-98
栏目:
土木工程防震减灾
出版日期:
2026-09-07

文章信息/Info

Title:
Analysis of the Bearing Capacity of Prestressed Concrete Continuous Beam Supports with Equal Height for Highway Ramp Overpass Bridges
文章编号:
1001-8662（2026）05-0088-11
作者:
吴斐璠; 李朋朋; 单世纪; 胡佳恒
北京建业通工程检测技术有限公司，北京 102600
Author(s):
WU Feifan; LI Pengpeng; SHAN Shiji; HU Jiaheng
Beijing Jianyetong Engineering Testing Technology Co., Ltd., Beijing 102600, China
关键词:
匝道跨线桥; 预应力混凝土; 连续梁支架; 有限元分析; 承载力; 广义屈服函数
Keywords:
Ramp overpass;  Prestressed concrete;  Continuous beam support;  Finite element analysis;  Bearing capaci‐ty;  Generalized yield function
分类号:
TU323.5；TU378.4
DOI:
10.13512/j.hndz.2026.05.11
文献标志码:
A
摘要:
为了探索公路匝道跨线桥预应力混凝土等高度连续梁支架承载力。以海日绕城公路美兰机场至演丰段公路中的曲线匝道跨线桥为例，构建连续梁支架有限元模型，并在不同立杆伸出长度、不同步距、不同立杆间距和不同支架高度下分析支架承载力。结果显示：立杆伸出长度的增加会造成结构承载力的逐渐下降，步距和立杆间距的增加也会引起支架承载力的减少，同时支架承载力会随着支架整体高度的增加而减小，但承载力减少趋势不断变缓。本文获得的数值模拟结果与实际结果的误差较低，具有分析可靠性。模拟结果表明，在立杆伸出长度小于0.5m，步距和间距小于1.2m，支架高度小于15m，支架承载力安全可靠，安全系数符合规范。
Abstract:
To explore the bearing capacity of prestressed concrete continuous beam supports with equal height for highway ramp overpasses. Taking the curved ramp overpass bridge in the Meilan Airport to Yanfeng section of the Hairi Ring Road as an example, a finite element model of a continuous beam support was constructed, and the bear‐ing capacity of the support was analyzed under different extension lengths, step distances, spacing, and height of the support. The results show that an increase in the extension length of the upright pole will cause a gradual decrease in the structural bearing capacity, and an increase in step distance and pole spacing will also cause a decrease in the bracket bearing capacity. At the same time, the bracket bearing capacity will decrease with the increase of the over‐all height of the bracket, but the trend of reducing bearing capacity continues to slow down. The error between the numerical simulation results and the actual results obtained in this paper is low, and the simulation results have reli‐able analysis. The simulation results show that when the length of the vertical pole is less than 0.5 m, the step and spacing are less than 1.2 m, and the height of the support is less than 15 m, the bearing capacity of the support frame is safe and reliable, and the safety factor meets the specifications

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备注/Memo

备注/Memo:
收稿日期：2025-11-15
作者简介：吴斐璠（1995-），男，工程师，主要研究方向为道路与桥梁。E-mail: kfr8ihul@163.com
更新日期/Last Update: 2026-09-20