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Glass curtain wall structural system is composed of glass panels, supporting structure, supporting device, because of its good architectural effect, both at home and abroad in recent years has been the rapid development and show a broad application prospects. The mid-point supported glass curtain wall of glass curtain wall is characterized by permeability high, the supporting structure is simple and neat, the outstanding point of connection of the modern structure of the melody and glass support structure system, along with the glass process improvement and the construction of a large number of public buildings, point-supported glass curtain wall in increasingly wide range of domestic and international applications. Continues to expand due to the point-supported glass curtain wall supporting structure, lattice steel structure to meet the above requirements, and therefore has been widely used in the point-supported glass curtain wall supporting structure; point-supported glass curtain wall is no longer a local the curtain wall, but the development of the steel structure supporting the glass building. Curtain wall glass, thin metal plate, the entire curtain wall area, less wind resistance, therefore, building walls not only to meet the basic functional needs, but also its security, reliability, do further research. Currently supporting structure of the building curtain wall static performance-based, dynamic characteristics of the dynamic response of wind loads less. Fluctuating wind component in the natural wind caused by the structure of wind-induced vibration, continuous vibration can cause the building curtain wall structure of large deformation and stress caused by the structural fatigue damage. With the rapid development of science and technology and the improvement of people building aesthetics, the supporting structure of the building more and more to the light of the increasing requirements on the dynamic characteristics of the structure, is currently in the engineering design, how to determine the dynamic characteristics of the structure analysis dynamic load on the structure displacement and internal forces, it is an urgent problem. The finite element model the subsequent structural dynamic modification and optimization studies, engineering design phase should solve difficult problems. Firstly, using the finite element method to analyze the dynamic characteristics of the point-supported glass curtain wall structural system. CAE technologies, according to the characteristics of the structural system, the establishment of a steel beam elements, shell elements and glass plate as the basic unit finite element analysis model, the dynamic characteristics analysis, identify its modal parameters of natural frequencies and modes; then based on random vibration virtual excitation method were fluctuating wind loads of random vibration response spectrum analysis, to come the node displacement response of the structure under wind loads power spectrum, and provides a basis for reasonable optimized structure. On the basis of the analysis of the dynamic characteristics and fluctuating wind response spectrum analysis, dynamic performance issues for the curtain wall, based on the analysis of the results of the finite element model, this paper difference method to the dynamic sensitivity analysis power point-supported curtain wall structure, according to the results of the sensitivity analysis, modified to improved dynamic characteristics; select a valid design
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