The Development and Application of Analysis System of Wind Characteristics Observation for Bridge in the West Inland

Abstract

In the west inland of China, construction of large-span bridges become more and used, but in the existing anti-wind specification there is not the explicit values of strong wind characteristic parameters for inland areas influenced by complex mountainous region. Considering the phenomenon that the study on field measurement of turbulence characteristics has not yet been developed and combining the cable-stayed bridge with span 352m in the western gap of valley areas, a data processing system of wind speed observation based on Borland C++ Builder is compiled. The system can quickly and intelligently realize the statistical analysis of wind field monitoring data by the integration with standard template library (STL) which is defined as vector in C++. The paper presents program function, structure and development thoughts. Through the analysis for one-year field measured data, strong wind characteristics such as, the mean wind velocity, direction, turbulence intensity, gust factor and turbulence integral length are obtained. The results of the analysis provide the bases for wind tunnel test, flutter and buffeting analysis and wind load calculation and the results are compared with those of numerical simulation by FLUENT. The reliability and efficiency are confirmed.