Wind characteristics at a long-span sea-crossing bridge site based on monitoring data
Wind characteristics at a long-span sea-crossing bridge site based on monitoring data
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基于监测数据的大跨度跨海大桥现场风特征
DOI：
10.1177/1461348418762962
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发表时间：
2018-03
期刊：
影响因子：
--
通讯作者：
XIE Mowen
中科院分区：
文献类型：
--
作者：
ZHOU Yi;SUN Limin;XIE Mowen
本文利用6年的风资料，研究了东海大桥一般性风和强风的统计特征。桥址一般风具有相对稳定的年重复性，实测风场参数与设计规范建议值存在差异。对于强风，10 min平均风速和湍流变化均大大超过一般风，而湍流强度、积分长度尺度和阵风因子没有明显的定量趋势。与司牛的风谱（沿风向）相比，一般风和强风的实测风谱都向高频范围偏移。桥址风测容易对桥梁结构本身产生干扰，导致沿桥轴线方向湍流较大，且在高频范围内湍流动能较大，这是今后设计结构健康监测系统时需要考虑的问题。本研究为大跨径跨海桥梁的抗风设计与评价提供了现场依据。
Six years of wind data are used to investigate the statistical characteristics of general and strong winds acting on the Donghai Bridge, a sea-crossing bridge in China. The general wind at the bridge site shows a relatively stable annual repeatability, and the discrepancies are found between the measured wind field parameters and those suggested by the design code. For strong winds, both the 10-min mean wind speed and the turbulent variance greatly exceed those of general winds, while the turbulence intensity, integral length scale, and gust factor do not exhibit any noticeable quantitative trends. The measured wind spectra of both general and strong winds show a shift toward the high-frequency range compared with Simiu’s spectrum (along-wind direction). The wind measurements at the bridge site are easily interfered with the bridge structure itself, resulting in a greater turbulence along the bridge axis and a higher turbulent kinetic energy in the high-frequency range, which needs to be considered in designing structural health monitoring systems in the future. This study provides field evidence for the wind-resistant design and evaluation of long-span seacrossing bridges.
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DOI：
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发表时间：
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期刊：
Wind and Structures (SCI & EI) (IF 0.868) 风工程领域著名国际期刊之一
影响因子：
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发表时间：
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期刊：
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影响因子：
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