摘要
以某跨海双幅式桥梁为工程背景,开展基于实际桥梁的挡风障模型风洞试验.以车道风速折减系数为阻风性能评价指标,采用正交试验方法,研究挡风障安装片数、来流风偏角、来流风速、圆孔组合方式等参数对双幅式桥梁桥面风场影响,并开展挡风障阻风性能影响参数分析.试验结果表明,迎风侧车道风速折减系数大于靠近背风侧车道,风速折减系数差值随着方案阻风性能提升而增加,最大达0.37;挡风障安装片数、来流风偏角、圆孔组合方式对挡风障阻风性能影响显著,来流风速对迎风侧车道等效风速折减系数影响较大,对背风侧车道等效风速折减系数无明显影响;各因素对迎风侧及背风侧车道阻风性能影响程度均有较大差异.安装片数对双幅式桥梁靠近迎风侧车道桥面风场影响较小,而对靠近背风侧车道影响较大,且其与来流风偏角及风速的交互作用不明显.
A wind tunnel test on wind barrier models based on the actual bridge were carried out with a cross-sea twin parallel deck bridge as the engineering background. Taking the wind speed reduction coefficient as evaluation index of wind-resistance performance, the influence of number of wind barrier installation pieces, incoming wind deflection angle, incoming wind speed and the combination of holes on the wind field of the bridge deck was investigated based on orthogonal test, and the influence of wind barrier parameters on the wind-resist performance were analyzed. Results show that, the wind speed reduction coefficient of the lane on the wind barrier side is greater than that of the lane close to the leeward side, and the difference of the wind speed reduction coefficient increases with the improvement of the wind blocking performance of the scheme with the maximum value 0.37. Moreover, the number of wind barrier installation pieces, the deflection angle of the incoming wind, and the combination of round holes have significant influence on the wind-resistance performance of the wind barrier. The incoming wind speed has a greater influence on the equivalent wind speed reduction coefficient of the windward lane, while has ignorable influence on the equivalent wind speed reduction coefficient of the leeward lane. Also,the influence of different wind barriers parameters on wind-resistance performance on different lanes such as windward lane and leeward lane are significantly different. The interaction between the number of installation pieces,the incoming wind angle and the wind speed can be neglected. The number of installed pieces has little effect on the wind barrier of twin parallel deck bridges near the windward side lane,but has a greater impact on the leeward side lane,and its interaction with the incoming wind deflection angle and wind speed can be neglected.
作者
林晓波
侯海涛
练江峰
胡磊
卓卫东
林立
LIN Xiaobo;HOU Haitao;LIAN Jiangfeng;HU Lei;ZHUO Weidong;LIN Li(Department of Civil Engineering,Fuzhou University,Fuzhou,Fujian 350108,China;Fujian Provincial Key Laboratory of Wind Disaster and Wind Engineering,Xiamen,Fujian 361024,China;Xiamen Highway Development Center,Xiamen,Fujian 361000,China;Xiamen Zhongping Highway Survey and Design Institute Co.,Ltd.,Xiamen,Fujian 361000,China;Department of Civil Engineering and Architecture,Xiamen University of Technology,Xiamen,Fujian 361024,China)
出处
《福州大学学报（自然科学版）》
CAS
北大核心
2021年第1期87-94,共8页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(51708472)
福建省普通公路科研基金资助项目(201010)
福建省交通运输科技项目(201903,202022)
福建省高校产学合作项目(2020H6022)
建筑产业化闽台科技合作基地基金资助项目
厦门市风工程服务平台资助项目(3502Z20161016)。
关键词
挡风障
正交试验
风洞试验
双幅式桥梁
wind barrier
orthogonal test
wind tunnel test
twin parallel deck bridges
