一种典型工程结构风致振动现场测量  

Field measurements of wind-induced vibration of a structure

作　　者：余永生[1] 毕卫涛[1] 梁彬[1] 朱凤荣[1] 

机构地区：[1]北京大学湍流与复杂系统研究国家重点实验室,北京100871

出　　处：《实验流体力学》2006年第4期73-76,93,共5页Journal of Experiments in Fluid Mechanics

摘　　要：对一个建筑结构风致振动进行了现场测量研究。结构风振位移采用摄影法测量,由于观测目标不可触及,测量中采用了一种新的摄影定标方法,即利用正多边形物体来标定摄影比例尺,解决了难以接近的观测目标的动态位移测量问题。现场测量得到了某特定气象条件下当地大气湍流的平均风速、湍流度、风谱、积分尺度等统计量和结构风振最大位移,固有频率,阻尼比等振动参数。Field measurements were conducted on the wind-induced vibration of a structure. Photogrammetry was adopted to measure the displacements of the structure. Especially, a new calibration method, which employed some equilateral-polygonal or circular objects, was proposed to avoid contacting the measuring target. The statistical parameters of the turbulence and the displacement amplitudes, the natural frequencies and the damping ratios of the structure were obtained.

关 键 词：结构风振 摄影测量 现场测量 

分 类 号：X839.1[环境科学与工程—环境工程] TU198.3[建筑科学—建筑理论]