WIND LOAD SIMULATION AND WIND-INDUCED VIBRATION TIME-HISTORY ANALYSIS OF TALL BUILDING STRUCTURES

摘要

Wind-induced comfort problems of tall buildings have raised more and more attention. Empirical formulas from design codes as well as wind tunnel tests are widely proposed nowadays. However, as the complicate structure systems, especially structures with viscous dampers are widely applied, time-history analysis for wind-induced vibration is considered to be a more precise analysis way. In this paper, auto-regressive model of the linear filter method is used to simulate wind dynamic loads. Spatial correlation of nature wind, as well as dynamic nonlinearity of structure is concerned. Thus, wind-induced response of the structure could be expressed more accurately. The program based on object-oriented program language is developed to produce wind load time-history data. By inputting basic wind pressure, ground roughness and other parameters, wind load time-history data can be obtained, which can be exported to FEM program automatically to carry out wind-induced vibration time-history analysis. The program provides feasible method for wind-induced vibration analysis of tall building structures. Several typical examples are given here by the dynamic time-history analysis in combination with wind load numerical simulation. And the results show the effectiveness of this method in practical structure analysis and design.