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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:

38卷

期数:

2021年02期

页码:

69-78

栏目:

出版日期:

2021-03-25

文章信息/Info

Title:

Study on Flow Field Characteristics Around Separated Twin-box Girder Based on Surface Wind Pressure Analysis

文章编号:

1673-2049(2021)02-0069-10

作者:

李加武,朱长宇

长安大学 公路学院,陕西 西安 710064

Author(s):

LI Jia-wu, ZHU Chang-yu

School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China

关键词:

分离式双箱梁;  涡振;  风洞试验;  风压特性;  同步测压测振

Keywords:

separated twin-box girder;  vortex vibration;  wind tunnel test;  wind pressure characteristic;  synchronal measurement of pressure and vibration

分类号:

TU311

DOI:

10.19815/j.jace.2020.09081

文献标志码:

A

摘要:

为研究分离式双箱梁流场特性,以某分离式双箱梁断面斜拉桥为研究对象,采用节段模型测振与测压试验的方法得到分离式双箱梁不同状态下的表面风压,通过对风压进行分析处理得到不同状态下风压脉动主频分布及平均风压系数分布。在振动状态下,对扭转涡振锁定区间内及超出扭转涡振锁定区间后分离式双箱梁模型表面风的压力脉动主频分布区域的变化进行归纳总结,并与分离式双箱梁节段模型测振试验进行对比。在扭转涡振锁定区间内,对分离式双箱梁模型表面平均风压系数变化趋势进行对比; 对处于扭转涡振振幅上升阶段、振幅最大阶段、振幅下降阶段的分离式双箱梁模型表面风的压力脉动主频与模型扭转基频相等的区域变化范围进行归纳总结; 对分离式双箱梁不同状态下平均风压系数分布进行对比。结果表明:分离式双箱梁空隙内侧的涡脱是其产生扭转涡振的必要条件; 在涡振锁定区间内不同风速下,分离式双箱梁平均风压系数的变化规律一致; 上表面风压主频与扭转基频相同的区域随着风速的提高而缩小; 分离式双箱梁上游下表面平均风压系数受运动状态的影响较小。

Abstract:

In order to study the flow field characteristics of separated twin-box girder, a cable-stayed bridge with separated twin-box girder cross-section was taken as the research object, the surface wind pressure of the separated twin-box girder under different states was obtained by the method of segmental model vibration measurement and pressure test. Through the analysis of the wind pressure, the main frequency distribution of the wind pressure fluctuation and the average wind pressure coefficient distribution under different states were obtained. In the vibration state, the change of the main frequency distribution region of the surface wind pressure fluctuation of the separated twin-box girder model was summarized in the torsional vortex vibration locking region and beyond the torsional vortex vibration locking region, and it was compared with the vibration measurement test of separated twin-box girder segment model. In the locking region of torsional vortex vibration, the variation trend of average wind pressure coefficient on the surface of separated twin-box girder model was compared. The regional variation range of the main frequency of pressure fluctuation equal to the torsional fundamental frequency of the separated twin-box girder model was summarized at the rising stage, the maximum stage and the falling stage of torsional vortex amplitude. The distribution of average wind pressure coefficient of separated twin-box girder under different states was compared. The results show that the vortex shedding on the inner side of the gap is a necessary condition for torsional vortex vibration. The variation law of the average wind pressure coefficient of the separated twin-box girder is consistent under different wind speeds in the vortex vibration locking region. The area where the main frequency of surface wind pressure is the same as the torsional fundamental frequency decreases with the increase of wind speed. The average wind pressure coefficient of the upper and lower surface of the separated twin-box girder is less affected by the motion state.

参考文献/References:

[1] SATO H,KUSUHARA S,OGI K,et al.Aerodynamic Characteristics of Super Long-span Bridges with Slotted Box Girder[J].Journal of Wind Engineering & Industrial Aerodynamics,2000,88(2/3):297-306.
[2]NIETO F,MONTOYA M C,HERNANDEZ S,et al.Aerodynamic and Aeroelastic Responses of Short Gap Twin-box Decks:Box Geometry and Gap Distance Dependent Surrogate Based Design[J].Journal of Wind Engineering & Industrial Aerodynamics,2020,201:104147.
[3]马存明,王俊鑫,罗 楠,等.宽幅分体箱梁涡振性能及其抑振措施[J].西南交通大学学报,2019,54(4):724-730.
MA Cun-ming,WANG Jun-xin,LUO Nan,et al.Vortex-induced Vibration Performance and Control Measures of Wide Twin-box Girder[J].Journal of Southwest Jiaotong University,2019,54(4):724-730.
[4]杨詠昕,葛耀君,项海帆.大跨度桥梁中央开槽颤振控制效果和机理研究[J].土木工程学报,2006,39(7):74-80.
YANG Yong-xin,GE Yao-jun,XIANG Hai-fan.Flutter Control Effect and Mechanism of Central-slotting for Long-span Bridges[J].China Civil Engineering Journal,2006,39(7):74-80.
[5]WANG J X,MA C M,JING H M,et al.Experimental Study on Aerodynamic Admittance of Twin-box Bridge Decks[J].Journal of Wind Engineering & Industrial Aerodynamics,2020,198:104080.
[6]许福友,丁 威,姜 峰,等.大跨度桥梁涡激振动研究进展与展望[J].振动与冲击,2010,29(10):40-49,249.
XU Fu-you,DING Wei,JIANG Feng,et al.Development and Prospect of Study on Vortex-induced Vibration of Long-span Bridges[J].Journal of Vibration and Shock,2010,29(10):40-49,249.
[7]UTSUNOMIYA H,NAGAO F,NODA M,et al.Vortex-induced Oscillation of a Bridge in Slowly Fluctuating Wind[J].Journal of Wind Engineering & Industrial Aerodynamics,2001,89(14/15):1689-1699.
[8]PATIL A,JUNG S,LEE S,et al.Mitigation of Vortex-induced Vibrations in Bridges Under Conflicting Objectives[J].Journal of Wind Engineering & Industrial Aerodynamics,2011,99(12):1243-1252.
[9]周 帅,曾永平,杨国静,等.桥梁箱型吊杆涡振与驰振耦合振动的数值模拟[J].建筑科学与工程学报,2015,32(2):84-90.
ZHOU Shuai,ZENG Yong-ping,YANG Guo-jing,et al.Numerical Simulation on Coupled Vibration of Vortex-induced Vibration and Galloping Vibration for Box Hangers of Bridges[J].Journal of Architecture and Civil Engineering,2015,32(2):84-90.
[10]雷 旭,陈政清,华旭刚,等.风雨耦合作用下桥梁主梁涡振节段模型试验[J].建筑科学与工程学报,2018,35(3):54-62.
LEI Xu,CHEN Zheng-qing,HUA Xu-gang,et al.Experiment on Vortex Vibration of Bridge Main Girder's Section Model Under Coupling Effect of Wind and Rain[J].Journal of Architecture and Civil Engineering,2018,35(3):54-62.
[11]崔 欣,王慧贤,管青海,等.栏杆透风率对主梁涡振特性影响的风洞试验[J].长安大学学报:自然科学版,2018,38(3):71-79.
CUI Xin,WANG Hui-xian,GUAN Qing-hai,et al.Wind Tunnel Experimental on Influence of Railing Ventilation Rate on Characteristics of Vortex-induced Vibration of Main Girder[J].Journal of Chang'an University:Natural Science Edition,2018,38(3):71-79.
[12]管青海,李加武,刘健新.典型箱梁断面双竖向涡振区的成因分析[J].长安大学学报:自然科学版,2013,33(4):40-46.
GUAN Qing-hai,LI Jia-wu,LIU Jian-xin.Investigation into Formation of Two Lock-in Districts of Vertical Vortex-induced Vibration of a Box Bridge Deck Section[J].Journal of Chang'an University:Natural Science Edition,2013,33(4):40-46.
[13]崔 欣,李加武,陈 飞,等.准流线型桥梁断面涡激共振的雷诺数效应[J].长安大学学报:自然科学版,2011,31(2):47-51,62.
CUI Xin,LI Jia-wu,CHEN Fei,et al.Reynolds Number Effect on Vortex Resonance of Streamline-like Bridge Deck Section[J].Journal of Chang'an University:Natural Science Edition,2011,31(2):47-51,62.
[14]SHANG J M,ZHOU Q,LIAO H L,et al.Numerical Study of Wake and Aerodynamic Forces on a Twin-box Bridge Deck with Different Gap Ratios[J].Wind and Structures,2020,30(4):367-378.
[15]KWOK K C S,QIN X R,FOK C H,et al.Wind-induced Pressures Around a Sectional Twin-deck Bridge Model:Effects of Gap-width on the Aerodynamic Forces and Vortex Shedding Mechanisms[J].Journal of Wind Engineering & Industrial Aerodynamics,2012,110:50-61.
[16]王俊鑫,马存明,廖海黎.抑涡格栅对宽幅分离式双箱梁涡振性能的影响研究[J].桥梁建设,2017,47(6):24-29.
WANG Jun-xin,MA Cun-ming,LIAO Hai-li.Influences of Grid Plates on Vortex-induced Vibration Performance of Separated Wide Twin Box Girders[J].Bridge Construction,2017,47(6):24-29.
[17]李志国,周 强,马存明,等.中央格栅抑制分离式双箱梁涡振的机理研究[J].桥梁建设,2018,48(1):19-24.
LI Zhi-guo,ZHOU Qiang,MA Cun-ming,et al.Mechanism of Suppressing Vortex-induced Vibration of Twin-box Girder Using Central Grids[J].Bridge Construction,2018,48(1):19-24.
[18]LAIMA S,LI H.Effects of Gap Width on Flow Motions Around Twin-box Girders and Vortex-induced Vibrations[J].Journal of Wind Engineering & Industrial Aerodynamics,2015,139:37-49.
[19]LAIMA S,LI H,CHEN W,et al.Investigation and Control of Vortex-induced Vibration of Twin Box Girders[J].Journal of Fluids and Structures,2013,39:205-221.
[20]MA C M,WANG J X,LI Q S,et al.Vortex-induced Vibration Performance and Suppression Mechanism for a Long Suspension Bridge with Wide Twin-box Girder[J].Journal of Structural Engineering,2018,144(11):04018202.
[21]KARGARMOAKHAR R,CHOWDHURY A,IRWIN P.Reynolds Number Effects on Twin Box Girder Long Span Bridge Aerodynamics[J].Wind and Structures,2015,20(2):327-347.
[22]MA C M,PEI C,LIAO H L,et al.Field Measurement and Wind Tunnel Study of Aerodynamic Characteristics of Twin-box Girder[J].Journal of Wind Engineering & Industrial Aerodynamics,2020,202:104209.
[23]杨詠昕,周 锐,葛耀君.大跨度分体箱梁桥梁涡振性能及其控制[J].土木工程学报,2014,47(12):107-114.
YANG Yong-xin,ZHOU Rui,GE Yao-jun.Vortex-induced Vibration and Its Control for Long-span Bridges with Twin-box Girder[J].China Civil Engineering Journal,2014,47(12):107-114.
[24]SHWETANK K,SYAHRIR R,PANDIAN V,et al.Simplified Predictive Model for Downhole Pressure Surges During Tripping Operations Using Power Law Drilling Fluids[J].Journal of Energy Resources Technology,2020,142(12):123001.
[25]YANG Y,ZHOU L,SHI W,et al.Interstage Difference of Pressure Pulsation in a Three-stage Electrical Submersible Pump[J].Journal of Petroleum Science and Engineering,2021,196:107653.
[26]ZHANG N,GAO B,NI D,et al.Coherence Analysis to Detect Unsteady Rotating Stall Phenomenon Based on Pressure Pulsation Signals of a Centrifugal Pump[J].Mechanical Systems and Signal Processing,2021,148:107161.

相似文献/References:

备注/Memo

备注/Memo:

收稿日期:2020-09-30
基金项目:国家自然科学基金项目(51978077)
作者简介:李加武(1972-),男,安徽舒城人,教授,博士研究生导师,工学博士,E-mail:34086100@qq.com。

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更新日期/Last Update: 2021-03-20