CAJ | 학술논문

现场实测是获得结构所在地风特性的主要途径，因而实测数据的准确性至关重要。为了开展风特性精细化研究，重点分析了结构振动对所测数据的影响。通过实验测出相同风场内考虑和不考虑风速仪基底振动的风特性时程数据，分析对比了不同工况下获得的平均风速、紊流强度、紊流积分尺度及功率谱密度，其中基底分别输入了“韦帕”台风作用下润扬大桥主梁跨中横向振动和白噪声。结果表明，在基底输入主梁振动信号时，基底振动对实测平均风速以及紊流特性的影响程度均很小，但会导致实测紊流强度和顺风向功率谱密度略高于真实值。结论可为结构风场测试及数据分析提供参考。
현장실측시획득결구소재지풍특성적주요도경，인이실측수거적준학성지관중요。위료개전풍특성정세화연구，중점분석료결구진동대소측수거적영향。통과실험측출상동풍장내고필화불고필풍속의기저진동적풍특성시정수거，분석대비료불동공황하획득적평균풍속、문류강도、문류적분척도급공솔보밀도，기중기저분별수입료“위파”태풍작용하윤양대교주량과중횡향진동화백조성。결과표명，재기저수입주량진동신호시，기저진동대실측평균풍속이급문류특성적영향정도균흔소，단회도치실측문류강도화순풍향공솔보밀도략고우진실치。결론가위결구풍장측시급수거분석제공삼고。
Field measurement is a main way to obtain wind characteristics of a structure site,thus the accuracy of measured data is very important.In order to conduct a refined study on wind characteristics,the influence of structural vibration on wind characteristics was analyzed specifically here.The wind time-history data in the same wind field were measured with and without anemometer-base vibrations.The wind characteristics including mean wind speed,turbulence intensity,turbulence integral scale and power spectral density in different cases were analyzed and compared.In tests,the measured lateral vibrations of the deck of Runyang Bridge under typhoon Wipha and the white noise were employed as the anemometer-base signal inputs.Results showed that structural vibration has little influence on the measured mean wind speed and turbulent wind characteristics when the measured lateral vibration of the deck is an input;however,it may make the turbulence intensity and power spectral density in along-wind direction slightly larger than the corresponding true values.Conclusions provided a reference for wind field measurement and data analysis of engineering structures.