Abstract

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Title:: Design Research on Double Twist Rectangular Steel Tube Reticulated Shell

Author(s):: WANG Xiu-li; CHEN Qing-qing; WU Xiao-yan; School of Civil Engineering, Lanzhou University of Technology

Keywords:: double twist rectangular steel tube reticulated shell; seismic time history analysis; wind load; seismic performance; buckling mode

Abstract:: The seismic nonlinear time history analysis and wind load analysis for the double twist rectangular steel tube roof of Linxia National Grand Theatre were carried out using general finite element software ANSYS. According to the analysis results, the key members of the structure were preliminarily determined, and the mechanical behavior of the key joints of the reticulated shell was analyzed based on considering geometric and material nonlinearities. The straight rectangular steel tube with the same size of the key member was established to study the plastic development and buckling mode of the two joints. The results show that the double twist rectangular steel tube single layer reticulated shell not only can satisfy various architectural styles, but also has excellent seismic performance and wind resistance as the traditional spherical reticulated shell structure. By comparing the bearing capacity and buckling mode of double twist rectangular steel tube joints and straight rectangular steel tube joints, the characteristics of double twist rectangular steel tube joints can be understood. The conclusions can provide guidance for subsequent construction and have practical significance for practical projects.