Verification And Application Of Wind Characteristics Measurement System On Long-span Structures

China has made rapid development in long-span structure and constructed a large number of representative structures in past decades. After decades of research, some basic problems involved in the design of long-span structures, such as static analysis, stability checking, construction simulation, have been solved in a good way. While the research progress of wind load which often plays a control role in the design was slowly. Compare with the traditional structure, the surface of long-span roof mainly affected by the separation and re-attachment of the flow, wind load is the main reason for long-span spatial structure damage. Therefore, the research of wind loading characteristics of long-span structure has important engineering significance.Currently, wind tunnel test and numerical calculation are the main way to do wind engineering research, but there are some differences between wind tunnel test results and the actural wind load of thestructure because of the "scale effect", there is still some difficulty to simulate the inlet and outlet boundary conditions for the numerical calculation. The full-scale measurement is the most basic and direct methods, can effectively validate and improve the methods and results of wind tunnel test and numerical calculation, but because of the high cost and hard wiring, the research of full-scale measurement is few at home and abroad. the wind field measured system based on wireless sensor technology which was developed by our team group, is expected to promote the progress of wind field measured on long-span structures.First, introduced the hardware and software of wireless wind field measurement system in details. Then, we checked the the wind field measurement system by the ZD-1 wind tunnel test in Zhejiang University, including the comparison between wind field measurement system and wind tunnel tests under the uniform flow and Class B geomorphology The results showed that the wireless wind field measured system is stable, and the sensors have a high to meet the measured requirements.Finally, the wireless wind field measurement system has been used in long-span roof structure of Zhejiang University Sports Center and National Stadium,the wind speed and direction, pressure on the roof were measured, and obtained a large number of data. Through the analysis of windspeed and direction, and comparison with the National Stadium, we researched the characteristics of wind field on long-span roof structures. the wind characteristics of long-span structure were analyzed by the pressure data through pressure coefficients, correlation and power spectrum are.