Precision Control And Wind Vibration Response Analysis Of Special Steel Structure

ABSTRACT:With the development of science and technology, a variety of high-rise, long-span and complex structures appear in daily life. The accuracy requirements of some special structural is higher and higher. However, the precision control of structure is a comprehensive, systematic work. It needs to take modal selection of structure, node structure, construction, use process and other factors into account. These structures are generally very sensitive to wind load. How to make sure that these structures be safe and suitable under wind load is also a hot issue in engineering.This study is based on a special steel structure. Because of its special purpose, the requriement of normal displacement of array is less than10mm under25m/s wind velocity and a large temperature difference. It is safe under65m/s wind velocity and a large temperature difference. This paper puts forward three kinds of spatial grid on the basis of functional requirements of buildings. A best scheme is chosed on the comparison of economic, stress condition, construction technology and others. This paper ensure the structure precision in terms of structure, component assembly, use process etc.The traditional static analysis methods can’t consider the correlation of wind speed and time. These may cause errors. This paper is based on the theory of wind, random vibration, signal processing and structural dynamics. With the help of Matlab, fluctuating wind is synthesized under Davenport spectrum. By comparing the simulated spectrum and the target spectrum,the simulation is good. By using the software of sap2000, time-history analysis of the structure under wind load is analyzed. By comparing the two methods, it is proved that the traditional equivalent static analysis underestimates the result. For such a high accuracy requirement and sensitive to wind structure, it needs dynamic analysis as a supplement.