[1]林子力,许芸熙.大跨度桥梁支座抗震性能模拟研究[J].华南地震,2025,(03):124-131.[doi:10.13512/j.hndz.2025.03.15]
　LIN Zili,XU Yunxi.Simulation Study on Seismic Performance of Large-Span Bridge Bearings[J].,2025,(03):124-131.[doi:10.13512/j.hndz.2025.03.15]
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大跨度桥梁支座抗震性能模拟研究()
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华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2025年03期
页码:
124-131
栏目:
土木工程防震减灾
出版日期:
2025-09-30

文章信息/Info

Title:
Simulation Study on Seismic Performance of Large-Span Bridge Bearings
文章编号:
1001-8662（2025）03-0124-08
作者:
林子力; 许芸熙
云南省交通规划设计研究院股份有限公司，昆明 650041
Author(s):
LIN Zili; XU Yunxi
Yunnan Provincial Transportation Planning and Design Research Institute Co.，Ltd.，Kunming 650041，China
关键词:
大跨度; 桥梁支座; 抗震性能; 有限元模拟; 地震动; 限位功能
Keywords:
Large span;  Bridge bearings;  Seismic performance;  Finite element simulation;  Ground motion; Limiting function
分类号:
U448.27
DOI:
10.13512/j.hndz.2025.03.15
文献标志码:
A
摘要:
由于传统桥梁支座抗震性能研究不能模拟不同的地震场景和参数变化，且不能对大跨度桥梁的性能进行多维度评估，导致大跨度桥梁支座抗震性能较差。为解决这一问题，选取某大跨度铁路钢桁架拱桥为研究对象，选取四种不同类型的支座，利用三维空间有限元软件Abaqus构建研究对象三维空间有限元模型，分析不同地震动输入条件下研究对象支座抗震性。结果显示：摩擦摆减、隔震支座在研究对象内产生显著的限位功能，令全部支座纵桥向变形水平抑制在0.85m范围内；研究对象采用摩擦摆减、隔震支座时对地震作用下主梁位移产生相应的约束作用；地震动影响下，摩擦摆减、隔震支座变形大于其自由程状态，其限位功能被启动产生纵向约束，由此造成研究对象上部结构传输至桥塔与桥墩的地震内力值提升；研究对象采用摩擦摆减、隔震支座后，在不同地震动条件下不同桥墩之间能够实现协同抗震；研究对象采用摩擦摆减、隔震支座后在不同地震动作用下均维持弹性状态，符合预期设定的抗震目标。
Abstract:
Due to the inability of traditional research on the seismic performance of bridge bearings to simulate different seismic scenarios and parameter changes，and the inability to conduct multidimensional evaluations of the performance of large-span bridges， the seismic performance of large-span bridge bearings is poor. To solve this problem， a large-span railway steel truss arch bridge was selected as the research object. Four different types of supports were selected，and a three-dimensional spatial finite element model of the research object was constructed by using the three-dimensional spatial finite element software Abaqus. The seismic performance of the research object’s bearings under different ground motion input conditions was analyzed. The results show that the friction pendulum reduction and isolation bearings have a significant limiting function within the research object， which suppresses the longitudinal bridge deformation level of all bearings within the range of 0.85 m. The research object uses friction pendulum reduction and isolation bearings to exert corresponding constraint effects on the displacement of the main beam under seismic action. Under the influence of ground motion，friction reduction and deformation of isolation bearings are greater than their free path state， and their limiting function is activated to generate longitudinal constraints， resulting in an increase in the seismic internal force value transmitted from the upper structure of the research object to the bridge tower pier. After using friction pendulum reduction and isolation bearings， the research object can achieve collaborative seismic resistance between different bridge piers under different ground motion conditions. The research object maintains an elastic state under different seismic ground motions after using friction pendulum reduction and isolation bearings，which meets the expected seismic target.

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备注/Memo

备注/Memo:
收稿日期：2024-06-24
作者简介：林子力（1989-），男，高级工程师，主要研究方向为桥梁设计及抗震。E-mail：l7123313@163.com
更新日期/Last Update: 2025-09-30