The Dynamic Characteristics And The Most Unfavorable Earthquake Loads Of Single-layer Hyperbolic Paraboloid Latticed Shell Structure

With the development of architecture, and because of its changeable surface, the latticed shell structure has been more and more used in long-span public buildings. This paper mainly focuses on the analysis about the dynamic properties and the most unfavorable earthquake of single-layer hyperbolic paraboloid latticed shell structure.With the help of finite-element analysis software ANSYS, the ruled surface characteristic of single-layer hyperbolic paraboloid shell has been used in the modeling process. Three different kinds of link arrangement form single-layer hyperbolic paraboloid latticed shell structure are modeled in this paper. The Block Lanczos method has been used in the extraction of the first mode vibration frequency of different parameters latticed shell structure. And according to the frequency value, multivariate linear form and multivariate nonlinear form frequency useful computational formula are matched in this paper by using least square method.The seismic wave used in this paper is transformed from the design spectrum which is given by the national standard. The author transform the seismic wave in different intensity and different geologic site condition into power spectral density function through the Fourier transform, and compose seismic wave with trigonometric Fourier series model. Seven seismic waves are composed in this paper which include six intensity in the first geologic site condition wave, six intensity in the second geologic site condition wave, six intensity in the third geologic site condition wave, six intensity in the fourth geologic site condition wave, seven intensity in the second geologic site condition wave, eight intensity in the second geologic site condition wave and nine intensity in the second geologic site condition wave.Load the seismic wave on the structure model which consider the influence of geometric non-linearity and material non-linearity. The most unfavorable earthquake is discussed in this paper by contrasting the dynamic response of dangerous node. And compare the dynamic response of three different form structures, the influence of structure form can be summarized.