陕京一线黄河悬索管桥的风致响应分析  

Analysis on the wind-induced response of Yellow River pipeline suspension bridge in the first Shaanxi-Beijing Gas Pipeline

作　　者：张平[1] 王俊强[1] 兰惠清[2] 马红莲[1] ZHANG Ping WANG Junqiang LAN Huiqing MA Honglian(China Special Equipment Inspection and Research Institute Beijing Jiaotong University)

机构地区：[1]中国特种设备检测研究院 [2]北京交通大学

出　　处：《油气储运》2016年第12期1347-1352,共6页Oil & Gas Storage and Transportation

基　　金：国家科技支撑计划重点项目"基于风险的穿跨越管段安全可靠性检测评价技术研究";2011BAK06B01-12;质检总局科技计划项目"河流穿越管道检测技术研究";2014QK245

摘　　要：为了研究风载荷对悬索管桥的影响,以陕京一线黄河悬索管桥为研究对象,建立了有限元仿真模型和风振模拟模型。采用工程验证的方法,利用管桥的远程动态监测系统,在2.8 m/s的低风速下将仿真模拟的桥跨结构应力变化曲线与实际工程所测曲线进行对比,验证了所建模型及模拟方法的正确性。在此基础上分析了该管桥结构在27 m/s高风速作用下的应力、位移响应情况,结果表明:管桥桥垮的应力远小于其许用应力(240 MPa),交变应力对管桥疲劳寿命的影响可以忽略;管桥桥垮的位移较大,桥垮1/2处的最大位移超过0.5 m;悬索管桥是典型的大位移、小应变的几何非线性结构。In order to study the effect of wind load on pipeline suspension bridges, the finite element simulation model and the wind vibration simulation model were built up with the pipeline suspension bridge over the Yellow River in the first Shaanxi-Beijing Gas Pipeline as the research object. By means of the engineering verification method, the remote dynamic monitoring system of the bridge was used to compare the simulated stress change curve of the bridge span structure at the low wind speed （2.8 m/s） with the measured curve to verify the validity of the models and the simulation method. And then, the stress and displacement response of the bridge structure at the high wind speed （27 m/s） was investigated. It is shown that the stress of the bridge span is far less than the allowable one （240 MPa） and the effect of the alternating stress on the fatigue life of the bridge is negligible. The displacement of the bridge span is larger and reaches the maximum （over 0.5 m） at its 1/2 position. To sum up, the pipeline suspension bridge is a typical geometrically nonlinear structure with large displacement and small strain. （8 Figures, 17 References）

关 键 词：悬索管桥 有限元仿真 风振模拟 工程验证 等效应力 动态监测 DAVENPORT谱 

分 类 号：TE832[石油与天然气工程—油气储运工程]