## 1 Introduction  
Typhoons are highly destructive and disastrous weather systems and one of the major catastrophic weather systems that affect China. Approximately 35% of the typhoons in the entire Northwest Pacific Ocean land in China. Further attention should be paid to the harmful vibration of high-rise buildings caused by typhoons to ensure the structural safety and the comfort of residents. Therefore, analysis the typhoon characteristics, including wind field distribution and its evolution, to estimate the dynamic environment parameters and the engineering design of disaster prevention and mitigation is very important [1]. Given the particularity of each typhoon, they are difficult to simulate in the laboratory; consequently, field measurement is the most effective method and has increasingly become as an important basic and long-term direction in the study of structural wind resistance [2]. Countries with developed wind engineering research have successively established a database of wind characteristics in the region and obtained relatively complete analysis results through large-scale observations. [PERSON] proposed the popular Davenport spectrum [3] and several concepts of the atmospheric boundary layer, such as gradient wind, exponential law, and ground roughness, by which different terrain types are described [4] based on the statistics of the horizontal component of gust in approximately 70 spectra in strong winds. [PERSON], [PERSON], [PERSON], [PERSON] et al. revealed the effects of height, ground roughness and wind speed on wind characteristics by performing a series of observations of the Gust factor, turbulence and integral length scale measured at different heights [5; 6; 7; 8]. [PERSON] and [PERSON] have the experimental studies of wind characteristics in China, they have monitored representative super-high-rise buildings in China to investigate wind characteristics at the top of buildings, such as mean wind speed and direction, turbulence intensity, gust factor, turbulence integral scale, wind speed spectrum and correlation [9; 10; 11]. [PERSON] et al. have investigated the relationship between different pulsating parameters and between the pulsating parameters and gust duration by using an anemometer at the top of a building [12]. Several field measurements have been carried out on the top of high-rise buildings in Guangzhou and Shanghai, the wind characteristics, such as mean wind speed, mean wind direction, turbulence intensity, gust factor, turbulence integral length scale, probability distribution of fluctuating wind speed, and wind speed spectrum, are analyzed. These super-tall buildings are all urban landmark buildings, and their high-altitude wind characteristics are representative. However, the plane size of a single high-rise building is relatively limited, so it is difficult to conduct multi-point synchronous observation. At present, research on multi-point simultaneous observation of wind fields is generally only found in the study of extra-large bridge projects. Such as field measurement of the Great Belt Bridge in Danish [13]. [PERSON] made field measurements of natural wind conducted at the Ohnaruto Bridge and the Akashi-Kaikyo Bridge [14]. For the purpose of investigating the turbulent characteristics of strong wind during a typhoon landing period, two 3-dimensional ultrasonic anemometer stations are set up 30 m horizontally apart on the Macao Friendship Bridge [15]. However, these field studies are limited to the wind field characteristics under the condition of relatively open topography near the ground, and with the continuous increase in the height of high-rise buildings being built, more attention is paid to the multi-point wind characteristics at heights above 100 m.  
Although researchers have exerted considerable effort in the measurement of typhoon wind characteristics and structure response under the action of typhoons, the understanding of typhoon wind characteristics remains unclear due to the high cost, long period, and difficulty of field measurement.