Analysis Of Wind-induced Dynamic Effect Of Steel Corridor In The Air

Since the reform and opening up,China has built many high-rise buildings with aerial steel corridors.The structural characteristics of these buildings are characterized by high flexibility,low damping,and strange shapes.They are also more sensitive to the effect of wind,and their performance is obviously different from ordinary high-rise buildings.For double-tower buildings,their design and wind vibration force response analysis face many challenges beyond the norm.However,up to now,the analysis of wind vibration response of high-rise buildings with aerial steel corridors in the southeast coastal area of China has at least the following three main difficulties:First,The southeast coast is seriously affected by typhoons,and the actual measurement available for structural design reference Lack of data;Second,Reliability of numerical model and lack of verification of system specifications for wind vibration calculations;Third,Under different load conditions,there are many main parameters that affect the stress of the conjoined and tower,lack of system research and analysis of wind vibration force parameters.This paper takes the high-rise building structure of the aerial steel corridor in Xiamen International Trade Financial Center equipped with a structural health system as the research object,and studies the wind field characteristics of the high-rise buildings in the southeast coast through the measured wind speed and wind direction on the top floor of the building;second,The response analysis method is used to simulate the finite element model and compare it with the actual measurement data of the actual monitoring system to study the reliability of the wind field simulation,the rationality of the model and the feasibility of the wind vibration calculation;finally,We research The changes of the wind-induced vibration response of the structure based on the theoretical study of parameter when the internal and external parameters of the aerial steel corridor are changed.The most unfavorable load conditions of the structure are determined and the corresponding design reference suggestions are given.Mainly include the following aspects:Obtain the actual wind field data by setting up wind speed and direction indicator on the roof layer of high-rise buildings,and obtain the average wind speed and average wind direction by vector decomposition method.The monsoon statistical characteristics near Xiamen International Trade and Financial Center are discussed,and the monsoon and typhoon are further compared and analyzed.The turbulence intensity,gust factor,and turbulence integration scale change with the average wind speed and average wind direction.The horizontal coherence of the high-altitude wind field was studied,and the pulsating wind speed spectrums in the downwind and crosswind directions were estimated to obtain a more accurate area.The description of the wind field characteristics is the basis for further wind field simulation and wind-induced dynamic effects.The rationality of the numerical model is verified by comparing the correlation coefficients of modes and mode shapes.Taking the measured data as reference,the harmonic superposition method is used to simulate the measured wind speed time history of the building under the action of typhoon,and the wind load acting on the structure is calculated by referring to the shape coefficient of the wind tunnel test result.Based on the wind vibration calculation theory and the ANSYS dynamic analysis platform,the wind vibration force response of the built model is calculated,and compared with the synchronous actual measurement results of the monitoring system to verify the reliability of the built model for wind vibration calculation.Based on the theory of structural wind-induced vibration parameters research,we respectively proceed from three aspects of different load conditions,the setting of steel corridor structure,and the sensitivity analysis of the overall structure parameters to study the dynamic characteristics of the structure and determine the most unfavorable load.The wind-induced dynamic effect of the overall structure and the steel steel corridor structure under working conditions is determined.Based on the measured data,the research in this paper expands the wind-induced dynamic effect analysis of high-rise shaped buildings,and provides a reference for the wind-resistant design of high-rise shaped buildings with aerial steel corridors in the southeastern coastal areas...