The Static And Dynamic Response Analysis For Inflatable Membrane Structures Under The Wind Load

For the inflatable membrane structure, its development, classification,advantages and disadvantages, membrane material property, domestic and foreignresearch advancement are introduced.With non-moment shell theory, the theoretical formula of form-finding arepresented for the half-cylindrical and hemispherical shape structure. The solvingprocedure of the finite element method is introduced for the air-supportedinflatable membrane structure. Form-finding numerical results show that thedifference of the vector height is less than6%, which verifys the correctness of thetheoretical formulas.With the large deformation prestressed model, the structure modal andvibration frequency are solved. The vibration frequency increases as the stiffnessincreases. And the vibration frequency decrease as mass increases. Exertingenhancing cables will affect the frequency of vibration of the structure.The wind load shape coefficients are computed for the semi-cylindrical andhemispherical inflatable membrane structures, and compared with the test data. Theerror is small.The mechanics properties of the air-supported membrane structures areanalyzed and compared by changing the film thickness and the internal pressure aswell as enhancing cables. Increasing the film thickness or the internal pressure isbenefit to increasing the bearing capacity of the structure. The stability and bearingcapacity will be improved after the cables are exerted.The fluctuating wind load is calculated using the harmonic superpositionmethod. Combined with the wind load shape coefficient the dynamic analysis of thestructure is made. displacement and stress distribution are obtained. Compared withstatic analysis, the maximum value of the displacement and stress for the structureis slightly less.