| 基于规范及实测风谱的苏通大桥抖振响应对比研究 |
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| 引用本文： | 王浩,李爱群,焦常科,谢静.基于规范及实测风谱的苏通大桥抖振响应对比研究[J].土木工程学报,2011(10):91-97. |
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| 作者姓名： | 王浩 李爱群 焦常科 谢静 |
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| 作者单位： | 东南大学混凝土及预应力混凝土结构教育部重点实验室; |
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| 基金项目： | 国家杰出青年基金(50725828); 国家自然科学基金(50978056、50908046); 国家教育部博士点基金(200802861012); 东南大学高校基本科研业务费项目(3205001101、Seucx201106); 湖南大学风工程与桥梁工程湖南省重点实验室开放基金 |
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| 摘 要： | 复核结构设计是桥梁结构健康监测系统的主要功能之一。以世界第一大跨斜拉桥——苏通大桥为工程背景,采用实测风谱对大桥设计阶段基于规范谱所进行的抖振分析进行验证。首先采用非线性最小二乘法对桥址区实测强风紊流功率谱密度函数进行拟合,获得实测谱曲线,并分别以该实测拟合谱和规范谱为目标谱分别模拟桥址区三维脉动风场。然后采用上述两种风场,基于ANSYS对苏通大桥进行非线性时域抖振响应分析。两种分析结果的对比表明:与实测谱相比,基于规范谱所得的主梁抖振响应情况不一,但主塔抖振响应均偏于保守;两种抖振响应的PSD曲线整体趋势基本一致。分析结果可为该桥的风致抖振性能评价提供研究信息,同时对其他类型结构的抗风设计具有重要的参考价值。
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| 关 键 词： | 斜拉桥 抖振性能 Kaimal谱 Panofsky谱 实测风谱 时域分析 结构健康监测 |
Comparable study of the buffeting response of Sutong Bridge based on specification and measured wind power spectrum |
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| Wang Hao Li Aiqun Jiao Changke Xie Jing.Comparable study of the buffeting response of Sutong Bridge based on specification and measured wind power spectrum[J].China Civil Engineering Journal,2011(10):91-97. |
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| Authors: | Wang Hao Li Aiqun Jiao Changke Xie Jing |
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| Affiliation: | Wang Hao Li Aiqun Jiao Changke Xie Jing(Key Laboratory of Concrete & Prestressed Concrete Structure of the Ministry of Education,Southeast University,Nanjing 210096,China) |
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| Abstract: | Verifying the structural design is one of the major objectives of Structural Health Monitoring System(SHMS) of bridges.Sutong Bridge(SB),the longest cable-stayed bridge in the world is taken as an example,and the buffeting analysis results using the bridge design specifications is verified by using the measured wind turbulence power spectral density(PSD) function.The measured wind spectrum obtained from strong winds records of the SB site is fitted by using the nonlinear least-squares method,and the three-d... |
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| Keywords: | cable-stayed bridges buffeting performance Kaimal spectrum Panofsky spectrum measured wind spectrum time-domain analysis structural health monitoring |
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