Dynamic Analysis of Reticulated Shell Subjected to Earthquake Excitation

Abstract

An optimum reticulated shell structure is selected and its dynamic properties are analyzed. In this paper analyses the dynamic feature and gains the elementary parameters from the analysis of free vibration. The frequencies and modes are compared by two finite element methods. The paper analyzes the dynamic responses of the reticulated shell structure subjected to two-dimensional and three-dimensional earthquake waves respectively. Simultaneously analyses the linear，geometric nonlinear and both geometric and material nonlinear dynamic responses in two situations. The nodal displacements and stresses of members are compared and analyzed. The characteristics of elastoplastic seismic responses of the structure are revealed and the basic rules are obtained.

An ANSYS-Based Approach for Nonlinear Dynamic Stability Analysis

“…Early research work on dynamic stability focused on the instability of a long-soft structure under harmonic loads [2]. Parametric resonance of cable stayed bridge, dynamic stability of single-layer reticulated shells and spherical shells and other skeletal structures under simple loads have been widely studied through theoretical analysis or finite element method [3][4][5]. Elastic dynamic stability of large span transmission tower and long span continuous rigid frame bridge with high-piers under earthquake, dynamic stability of concrete filled steel tubular arch bridge under earthquake, are mainly studied by simulation with the finite element method, based on ANSYS platform [6][7][8].…”