The Analysis And Design Of The Box Type Space Truss Under The Action Of Wind Load

As a kind of space structure,truss structure has a good advantage of different kinds of forms and good mechanical performance.It is usually used in large span building,exhibition hall,gym,bridge and other public building.The truss structure has always been one of the fastest development fields in our nation.With the development of economic and social,the requirement of truss structure has been demanded higher and higher.It should be not only safe and enough but also less weight and stronger.This need us change the old designing mind of truss structure.For example,the application of new material and the development of computer technology should be paid enough attention.With the rapid development of the computer technology,it is possible to make numerical simulation.The box-type truss structure is one of the most typical structure.It has the characteristics of large flexibility and low stiffness.These characteristics make it more sensitive to wind load.Especially when the truss structure works on an island which is hit by the perennial hurricane.So the analysis of wind response to this special truss structure is necessary.First of all,the basic features of the structure has been introduced in this article and then two different kinds of computer simulation idea has been presented.With the comparison of the advantage and disadvantages,AR model in linear filter theory is adopted to simulate pulsant wind by the use of Matlab.The wind speed time history curve the program produced has spatial and time correlations.Finally make verification of the reliability by power spectrum comparison.Apply the wind load to the truss structure model and then obtain the dynamic response characteristics and the displacement response based on the random vibration theory.Make comparison of truss structure with different span.At present the application of wind load analysis at home and broad is limited to validation until now.This is far from enough.This theory should be used to control the design of structure.This article makes the analysis of structure subjected to the strong wind with the retrospect of wind load analysis.This article provide the reference for the research of wind vibration problem for the future...