Mechanical Properties Of Levy Cable Dome With Two Hoops In Each Tier When Local Component Failure

Aim to improve the complex construction method and the poor tolerating to components failure of traditional sunflower cable dome, a new sunflower cable dome with two hoops in each tier was proposed together with it's new tier-by-tier construction method. In order to prove the new cable dome perform much safer than the traditinal one when local components failure,a deep study in static performance, stability, dynamic performance of the new sunflower cable dome with two hoops on earch tier was carried out.A Comparative study on mechanical performance between the new sunflower cable dome whith two hooos in eatch tier and traditional sunflower cable dome was carried out with birth-death element method and transient dynamic method when local component failure. Stress distribution law and displacement change law of the new sunflower cable dome and the triditional sunflower dome was obtained when single ridge cable failure, multiple ridge cable failure, single diagonal cable failure and multiple diagonal cable failure. It was proved that the upper-hoop-cable is the key factor,with which the new structures performan much better then the traditional one.The comparison concerning the mechanical properties of stucture has been made by using nonlinear finite element theory and the arc-length method when local component failure under increasing load.The eigenvalue buckling analysis and nonlinear buckling analysis has also been done. Through analysis of static performance of two structures with load increasing, the eigenvalue buckling mode and nonlinear buckling law of the sunflower cable dome with two hoops in each tier has been obtained when local component failure.Dynamic behavior of sunflower cable dome with two hoops in each tie was studied to abtain the natural frequency and vibration mode changes when local compoment failure.A comparative study of Earthquake response between the sunflower cable dome with two hoops in each tie and the traditional cable dome was done using transient dynamic analysis method. The results show the new structure is superior to triditional cable dome system when local component failure.