流线型闭口箱梁断面风荷载空间相关性试验研究

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (2) : 76-80,1.

论文

流线型闭口箱梁断面风荷载空间相关性试验研究

张冠华1; 2 赵林1; 葛耀君1

作者信息 +

Studies on spatial correlation of wind loads on streamlined closed box girder cross-section

ZHANG Guan-hua1,2; ZHAO Lin1; GE Yao-jun1

Author information +

文章历史 +

摘要

对典型流线型闭口箱梁断面的风荷载效应进行同步测压风洞试验，比较了来流平均风速、湍流度、风攻角、展向间距等不同参数条件下风荷载在空间分布状况，对风速及其荷载效应的空间相关性进行深入研究，从时、频域两个方面来尝试分析现象及原因，探讨影响因素，证实升力、扭矩的展向相关性远大于风速、阻力的相关性，并发现升力与扭矩的相关性规律相似，风速与阻力相关性规律相似；验证了传统随机抖振动气动力理论所存在的不足

Abstract

The simultaneous measurement of wind load pressure on streamline closed box girder cross-section were test with pressure scanning valve in Tongji University wind tunnel, the spatial distribution conditions of wind load were understood, the reasons of the phenomenon were explored, compared with the different wind average speed, turbulence intensity, wind attack angle and span-wise distance; the spatial correlation on wind speed and its load effect were in-depth study from two aspects of time domain and frequency domain; with the correlation coefficient and coherence function, the mechanism and influence factors were analyzed; it were elaborated and confirmed that the span-wise correlations of lift force and torsion moment are much greater than the ones of wind speed and drag force, and there is the similar law of the correlation lift force and torsion moment, the similar law to wind speed and drag force; shortcomings of the traditional random aerodynamic buffeting theory were verified.

导出引用

张冠华; 赵林;葛耀君. 流线型闭口箱梁断面风荷载空间相关性试验研究[J]. 振动与冲击, 2012, 31(2): 76-80,1

ZHANG Guan-hua;ZHAO Lin;GE Yao-jun. Studies on spatial correlation of wind loads on streamlined closed box girder cross-section [J]. Journal of Vibration and Shock, 2012, 31(2): 76-80,1