Research On Static And Dynamic Of Tension Cylindrical Reticulated Mega-Structure

In the hybrid structure theory, discusses a new form of structures, cable, rod, beam system that is mixed: Tension cylindrical reticulated mega-structure. Through pre-stress, meliorates bearings, reducing the structure on the level of thrust bearings, bearing part of the bar and the section size. In this paper, using of the finite element method, researches the following aspects:(1) A new method to determine the initial pre-stress distribution for cable-bar-beam hybrid structures is optimization analytical method. This method can be through the existing finite element analysis software analysis pre-stressed distribution for structure without self-programming solution for structural analysis provides a convenient design.(2) Fist, Analyses the static capability of the structure under the load state, and the parameters of analysis to identify internal force structure, the changes of displacement, such as the future structure of the design parameters of the deign basis. Then compares with Tension reticulated mega-structure and reticulated mega-structure in the aspects of the static stability, and finds the lower part of cable set-effectively improve the structure of buckling load limit.(3) The characteristics of natural vibration frequency of the tension cylindrical reticulated mega-structure are researched. A series of parameter analyses are carried out for the dynamic characteristics of this structure, including structural span, rise-span ratio, sag-span ratio, grid size, three-dimensional truss beam height, secondary structure's load size, pole numbers, pre-stress and structural constraints .All this work will provide base for the seismic analysis of this structure.(4) With the time-history analysis studies the tension cylindrical reticulated mega-structure in the one-dimensional and multi-dimensional seismic wave ELCENTR0, the structure of the internal forces and part-key node displacement over time of the curve and analysis of the structure's dynamic response and change's of displacement.