大坝条件下曲梁桥风振响应研究
重庆科技学院, 建筑工程学院, 重庆 401331
| 摘 要： | 梁的线性曲线分布可能会对曲梁桥产生有利或比例的影响，为明确曲率对桥梁的风振响应的影响规律，本文结合风洞试验和数值模拟曲梁桥风振的研究。通过节段模型风洞试验获取曲梁桥风振响应，利用ICEM软件建立大坝有限元模型并进行CFD数值计算，通过对比数值计算结果和试验结果统计值验证有限元建模的准确性。然后分析5种曲率情况和5种风速工况对曲梁桥风振响应的影响规律，最后分析同一曲率下，大坝的存在对曲梁桥风振响应的影响规律。结果表明桥梁的位移平均值和均方根随着曲率的增大呈先增大后减小的趋势；桥梁的位移最不利曲率为0.0024；随着曲率的增加，桥梁高阶模态共振响应被激发出来，且高阶模态共振频率的带宽逐步增大；大坝的存在会使平均风速减小；随着风速的增大，桥梁的位移平均值和均方根均增大；当曲梁桥曲率较小时，大坝的存在会明显降低风荷载作用下曲梁桥的位移，但当曲率增大到一定程度时，这种趋势明显削弱。 |
| 关 键 词： | 曲梁桥; 曲率; 风速; 数值模拟; 风振响应 |
| DOI： | 10.57237/j.cear.2023.02.002 |
View:
Downloads:
收稿日期: 2023-04-28
接受日期: 2023-06-29
在线出版日期: 2023-07-24
Study of Wind Vibration Response of Curved Beam Bridge Under Dam Conditions
School of Engineering and Architecture, Chongqing University of Science and Technology, Chongqing 401331, China
| Abstract: | The linear curve distribution of the beam may have favorable or proportional effects on the curved beam bridge. In order to clarify the effect law of curvature on the wind vibration response of the bridge, this paper combines wind tunnel tests and numerical simulations of wind vibration of curved beam bridge. The wind vibration response of curved girder bridge is obtained through segmental model wind tunnel test, finite element model of the dam is established and CFD numerical calculation is performed by ICEM software, and the accuracy of finite element modeling is verified by comparing the statistical values of numerical calculation results and test results. Then, we analyze the influence law of five curvature cases and five wind speed conditions on the wind vibration response of the curved girder bridge, finally, analyze the influence law of the presence of the dam on the wind vibration response of the curved beam bridge at the same curvature. The results show that the mean displacement and root mean square of the bridge tend to increase and then decrease with the increase of curvature; the most unfavorable curvature of the bridge displacement is 0.0024; with the increase of curvature, the higher order modal resonance response of the bridge is excited and the bandwidth of the higher order modal resonance frequency gradually increases; The presence of dams reduces the average wind speed; As the wind speed increases, the average displacement and root mean square of the bridge also increase; When the curvature of the curved girder bridge is small, the presence of the dam will significantly reduce the displacement of the curved girder bridge under wind load, but when the curvature increases to a certain degree, this tendency is significantly weakened. |
| Keywords: | Curved Beam Bridge; Curvature; Wind Speed; Numerical Simulation; Wind-induced Vibration Response |
基金
| 1. | 重庆科技学院校企协同创新中心开放研究项目资助 (YKJCX2220624) |
参考文献
| [1] | 晏致涛, 李正良. 菜园坝长江大桥气动弹性模型风洞试验及分析 [J]. 桥梁建设, 2006, 000 (004): 15-17. |
| [2] | 郭勇, 孙炳楠, 叶尹, 等. 大跨越输电塔线体系气弹模型风洞试验 [J]. 浙江大学学报: 工学版, 2007, 41 (9): 5. |
| [3] | 李秋胜, 陈凡. 高层建筑气动弹性模型风洞试验研究 [J]. 湖南大学学报:自然科学版, 2016, 43 (1): 9. |
| [4] | Z. S. Chen, Z. Cheng, W. Xu, et al. Wind tunnel measurements for flutter of a long-afterbody bridge deck [J]. Sensors, 2017, 17 (2): 335. |
| [5] | 谭彪, 操金鑫, 杨詠昕, 等.大跨度平行双幅桥面颤振性能干扰效应 [J]. 同济大学学报 (自然科学版), 2020, 48 (04): 490-497. |
| [6] | 郭俊杰. 综合考虑行车安全及颤振性能的钢箱梁悬索桥风屏障优化研究 [D]. 西南交通大学, 2021. |
| [7] | 曾加东, 李明水, 张志田, 等. 斜风作用下桥塔对大跨度斜拉桥主梁静风荷载特性的影响 [J]. 公路交通科技, 2021, 38 (11): 52-58. |
| [8] | 曾攀, 钟铁毅, 闰贵平. 大跨径斜拉一斜拉协作体系桥动力分析 [J]. 计算力学学报. 2002, 19 (4): 471-476. |
| [9] | 马晓昕, 赵人达. 大跨斜拉桥动力分析 [J]. 四川建筑, 2009, 29 (04): 110-113. |
| [10] | 张永健. 斜拉式桁架桥仿真分析 [D]. 西安: 长安大学, 2004. |
| [11] | 霍卿, 许建林, 梅元贵. 高速铁路桥梁挡风屏遮蔽效应分析 [J]. 空气动力学学报, 2020, 38 (01): 73-81. |
| [12] | 曹杨, 王红红, 陈坤亮等. 渤海海域海上平台挡风墙高度计算模型研究 [J]. 天然气与石油, 2022, 40 (01): 102-108. |
| [13] | 王国华, 李兵, 徐文平等. 5000 m级海峡悬索桥抗风稳定性的设计研究 [J]. 交通科技, 2022, No. 311 (02): 42-46. |
| [14] | 黄志增. 基于有限元模拟的盾构隧道侧穿引起桥梁桩基础变形分析 [J]. 西部交通科技, 2022, No. 180 (07): 141-143. |
| [15] | 何源涛, 王若宇, 刘想. 大跨宽幅桥梁施工阶段风致振动响应研究 [J]. 四川水利, 2022, 43 (06): 45-47+73. |
| [16] | Ministry of Housing and Urban-Rural Development of the People’s Republic of China. Standard for Wind Tunnel Test of Buildings and Structures; JGJ/T 338-2014; China Architecture and Building Press: Beijing, China, 2014. |
| [17] | S. Zhao, J. H. Chen, J. H. Yue, et al. Sectional Model Wind Tunnel Test and Research on the Wind-Induced Vibration Response of a Curved Beam Unilateral Stayed Bridge. |
