Wind Vibration Response Analysis Of Long-span Steel Structure Pier

In recent years, along with the development of the process continuously, As well asthe local site, make steel structure bridge pier、bridge deck width increases unceasingly,but less study of bridge steel structure, and countries have not set specific to theindustry norms, take the 《Space truss design and construction regulations》(JGJ7-91)as a design criterion. Steel structure rack is connected the transfer station and the mainworkshop, to play the role of a supply of raw materials, once appear problem likelyparalyzed the whole chain, so for the safety design of steel structure rack is particularlyimportant. As a result, the dynamic properties of this kind of special structure ofsubstantial significance for study and engineering design instruction have theSubstantive meaning.In this paper, the representative of the large pier steel structure rack3D finiteelement modeling and simulation of wind speed time history curves, considering thespatial correlation and time domain analysis of a long-span steel structure windvibration time history response of the pier, combined with engineering practice andspecification in our country’s actual situation at home and abroad, puts forward thestructure of the wind vibration calculation method, reference for engineering designpersonnel use. Paper the main research contents are as follows:1、Structural wind engineering basic knowledge of random process power spectrumis studied, and the specification of the Davenport spectrum of wind load calculation(Davenport spectrum). Several simulation methods of wind speed time history curve, toMatlab programming modeling of AR model, concluded that wind speed time history curve, again by the transformation of the relationship between wind speed and windpressure, wind pressure time history curve is obtained.2、Using Sap2000large-span steel structure bridge finite element model isestablished, using the eigenvector method, a dynamic characteristics analysis of piersystem, import the wind pressure time history curve, and adopts the method of timehistory analysis for large span steel structure bridge dynamic time history analysis.3、Compare analysis, large span steel structure rack is sensitive to wind vibrationeffect for the structure of the pier on the surface of the wind vibration coefficient isobtained and the design safety coefficient. Of actual bridge engineering design has acertain reference and guidance significance, and the direction of further work weredescribed briefly.