[1]邹德强,刘雄,胡睿,等.基于纵向双自由度模型的斜拉桥非线性阻尼器参数及纵向地震响应的简化设计[J].长安大学学报(自然科学版),2025,45(6):31-41.
　ZOU De-qiang,LIU Xiong,HU Rui,et al.Simplified design of nonlinear damper parameters and longitudinal seismic response cable-stayed bridge based on longitudinal double-degree-of-freedom model[J].Journal of Chang’an University (Natural Science Edition),2025,45(6):31-41.
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基于纵向双自由度模型的斜拉桥非线性阻尼器参数及纵向地震响应的简化设计()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第45卷
期数:
2025年6期
页码:
31-41
栏目:
桥梁智能运维与防灾减灾
出版日期:
2025-11-30

文章信息/Info

Title:
Simplified design of nonlinear damper parameters and longitudinal seismic response cable-stayed bridge based on longitudinal double-degree-of-freedom model
文章编号:
1671-8879(2025)06-0031-11
作者:
邹德强1; 2; 刘雄2; 胡睿1; 3; 李立峰1
(1. 湖南大学 土木工程学院,湖南 长沙 410082; 2. 中国建筑第五工程局有限公司,湖南 长沙 410004; 3. 湖南省交通规划勘察设计院有限公司,湖南 长沙 410219)
Author(s):
ZOU De-qiang1; 2;  LIU Xiong2;  HU Rui1; 3;  LI Li-feng1
(1. College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China; 2. China Construction Fifth Engineering Bureau Co., Ltd., Changsha 410004, Hunan, China; 3. Hunan Provincial Communications Planning, Survey & Design Insititute Co., Ltd., Changsha 410219, Hunan, China)
关键词:
桥梁工程;  阻尼器参数;  简化设计;  大跨斜拉桥;  地震响应
Keywords:
bridge engineering;  damper parameters;  simplification;  long-span cable-stayed bridge;  seismic response
分类号:
U441.3
文献标志码:
A
摘要:
针对在传统斜拉桥抗震设计中,通常基于精细化有限元动力分析模型开展非线性时程分析,以获得结构地震需求结果,进而优化阻尼器参数,为简化初步设计过程,提出一种单塔或对称双塔斜拉桥简化纵向双自由度模型(DDFM)建立方法。在此基础上,采用解析和能量方法推导与质量及刚度相关的参数和结构纵向固有频率的分析方程,并提出黏滞阻尼器的等效线性化模型。此外,推导带有非线性黏滞阻尼器的大跨度斜拉桥的纵向地震响应分析方程。最后,通过与实桥有限元分析结果的横向对比,进一步验证所建立的简化纵向DDFM的有效性和适用性。研究结果表明:对于基本周期和水平抗推刚度,简化纵向DDFM计算得到的结果和有限元模拟结果的差异分别为2.05%和1.5%; 当黏滞阻尼器等效阻尼比为0.1～0.8时,简化纵向DDFM计算得到的关键构件纵桥向地震需求结果与有限元模拟结果误差小于20%。研究结果可为设计单位提供有效参考,以制定简化的初步设计方案,快速得到大跨度斜拉桥动力特性和纵向地震响应、确定合理非线性阻尼器参数。
Abstract:
In traditional seismic design of cable-stayed bridges, nonlinear time history analysis was typically conducted based on refined finite element dynamic models to obtain structural seismic demands, which were used to optimize damper parameters. To streamline the preliminary design process, a simplified double degree of freedom model(DDFM)was proposed for single-pylon or symmetrically double-pylon cable-stayed bridges. Analytical and energy methods were employed to obtain the fundamental period and the parameters related to mass and stiffness. An equivalent linearization model for viscous dampers was also developed. In addition, the analytical equations for the longitudinal seismic response of long-span cable-stayed bridges equipped with nonlinear viscous dampers were derived. The validity and applicability of the simplified DDFM were verified through comparative analysis with finite element results from an actual bridge. Comparative study results that the rusults differences between the simplified DDFM and the finite element simulations are only 2.05% for the fundamental period and 1.5% for the lateral stiffness, respectively. When the equivalent damping ratio of the viscous damper ranges from 0.1 to 0.8, the errors in the longitudinal seismic demands of key components calculated by the simplified DDFM remain below 20% compared to the finite element results. This study results valuable references for design institutes to develop simplified preliminary design schemes, rapidly assess the dynamic characteristics and longitudinal seismic responses of long-span cable-stayed bridges, and determine reasonable nonlinear parameters for viscous dampers.2 tabs, 9 figs, 23 refs.

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备注/Memo

备注/Memo:
收稿日期:2025-05-07
基金项目:国家自然科学基金项目(51978257,52278176); 中建五局科技研发计划资助项目(cscec5b-2020-17)
作者简介:邹德强(1976-),男,湖南邵阳人,中国建筑第五工程局有限公司工程师,E-mail:tzdlxq0222@163.com。
通信作者:李立峰(1971-),男,湖南沅江人,教授,博士研究生导师,工学博士,E-mail:lilifeng@hnu.edu.cn。
更新日期/Last Update: 2025-12-20