Wind-induced vibration characteristics of mega steel structures are very complex.Its dynamic performance can be influenced by all kinds of parameters.In this paper

a mega steel structure of 48 floors is analyzed.Aiming at three analysis cases

i.e.

without dampers

setting viscous dampers and visco-elastic dampers

structure dynamic responses under interaction of mean wind and fluctuating wind are studied comprehensively.By using the series of data gained from alongwind structural displacement response

internal force response of structural component and acceleration response of top-level

the influence law and change trend of dynamic performance of wind induced vibration control for high-rise buildings produced by attack angle of wind velocity and basic wind pressure

additional damping ratios

second order effect and so on

are studied in details.Some suggestions are made for practical structure analysis and design.