Joint Development Of Multi-mode Force Method Program By ANSYS And FORTRAN For The Wind-induced Dynamic Response In Wind Tunnel Tests Using Rigid Model

In the past of thirty years, various types of super-high-rise and long span roof structures have been developing very quickly in the world. The height of structures become higher and higher,and the span of structures is longer and longer. At the same time,many new materials and technology were applied,It leads a bundant structural forms to be generated.Meanwhile,such structures are of many characteristics: light weight,flexible,low damping and low natural vibration frequency. It yield that wind load becomes the dominant load during structure design. Thus, it is important for super-high-rise and long-span structures to carry out a further study on wind load and wind-induced dynamic response.The paper reviews previous research results,studing multi-mode force method deeply.A wind-induce response computation program was compliled for wind tunnel test using rigid model.The main study of the paper as follows:(1) Studing wind tunnel test using rigid model.(2) Making a further study of multi-mode force method, power spectrum ,mode force,mode force coefficient,mode displacement and wind load factor etc.(3) Studing ANSYS modeling, analysis and secondary development.Using ANSYS model and analyze the structures,and then using the APDL programs gain the needed data.(4) A wind load factor computation program was compiled with FORTRAN.(5) A project was supplied to verify the results of multi-mode force.