[1]陈 波,陈 欣.考虑行波效应的U形河谷上大桥地震响应分析[J].华南地震,2026,46(04):47-54.[doi:10.13512/j.hndz.2026.04.06]
　CHEN Bo,CHEN Xin.Seismic Response Analysis of a Long-Span Bridge over a U-Shaped Valley Considering Traveling Wave Effects[J].,2026,46(04):47-54.[doi:10.13512/j.hndz.2026.04.06]
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考虑行波效应的U形河谷上大桥地震响应分析()

华南地震[ISSN:1006-6977/CN:61-1281/TN]

卷:
46
期数:
2026年04期
页码:
47-54
栏目:
土木工程防震减灾
出版日期:
2026-07-09

文章信息/Info

Title:
Seismic Response Analysis of a Long-Span Bridge over a U-Shaped Valley Considering Traveling Wave Effects
文章编号:
1001-8662（2026）04-0047-08
作者:
陈 波; 陈 欣
苏州科技大学 土木工程学院，江苏 苏州 215011
Author(s):
CHEN Bo; CHEN Xin
School of Civil Engineering, Suzhou University of Science and Technology, Suzhou 215011, China
关键词:
U形河谷; 行波效应; 时程分析; 视波速; 多点激励
Keywords:
U-shaped valley;  Traveling wave effects;  Time history analysis;  Apparent wave velocity;  Multi-point
分类号:
P315.9
DOI:
10.13512/j.hndz.2026.04.06
文献标志码:
A
摘要:
聚焦于U形河谷上大跨度桥梁抗震设计中行波效应所产生的影响，以西部某特大桥为研究对象，构建桥梁三维有限元模型，运用多支撑激励的时程分析方法，系统地研究了地震动空间变异性对桥梁关键部位内力带来的影响。对桥梁进行模态分析，并选取德阳白马波与ElCentro波来进行对比分析。运用多点激励法，考虑视波速在100~1000m/s范围内，共有5组数据。研究结果表明：大跨度桥梁地震响应与一致激励分析结果相比存在明显差异，具体表现为内力响应的变化，其变化趋势与所选地震波频谱特性及视波速紧密相关。在低视波速区间内，地震响应随视波速变化呈现出较大波动；当视波速提高到600m/s以上时，结构响应峰值逐渐趋近于一致激励结果。
Abstract:
Focusing on the influence of traveling wave effect in the seismic design of long-span bridges spanning U-shaped valleys, a three-dimensional finite element model of a certain extra-long bridge in western China is construct?ed. The influence of spatial variability of ground motion on the internal forces at key sections of the bridge is system?atically studied by using the time-history analysis method of multi-support excitation. Modal analysis of the bridge was performed, and the Deyang Baima wave and El Centro wave were selected for comparative analysis. The multi-point excitation method was employed, considering five sets of data with apparent wave velocity ranging from 100 to 1000 m/s. The results indicate that the seismic response of long-span bridges differs significantly from that obtained through uniform excitation analysis. Such discrepancy is specifically reflected in the variation of internal force re?sponse, which is closely correlated to the spectral characteristics of the selected seismic waves and the apparent wave velocity. In the low apparent wave velocity range, the seismic response fluctuates greatly with the change of ap?parent wave velocity. When the apparent wave velocity exceeds 600 m/s, the peak structural response gradually ap?proaches the result of uniform excitation.

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备注/Memo

备注/Memo:
收稿日期：2025-09-27
基金项目：国家自然科学基金项目（52208361）；江苏省自然科学基金项目（BK20220638）联合资助。
作者简介：陈波（2000-），男，硕士研究生，主要从事岩土工程抗震研究。E-mail：15061973933@163.com通信作者：陈欣（1992-），男，副教授，主要从事土动力学与岩土地震工程研究。E-mail: geoxinchen@usts.edu.cn
更新日期/Last Update: 2026-07-20