Hao JipingŁ¬Liu Lijie
(Lai Gang Steel Structure Research and Development Center,Xi'an University of Architecture & Technology,Xi'an 710055,China)
Abstract:Based on the research on the post-tensioned and shaped dome, a new forming model of a single-chorded plane space truss with tension is presented. By tests and nonlinear finite element analysis,the shape forming process is studied.The geometric and material nonlinearities are employed in the finite element analysis.By adding individual beam elements,the connector between top joints and chords in the finite element model and the factors affecting the shape forming process of dome, such as the bending stiffness of duckbilled connector and the size of top joints, can be taken into account.It is shown that the method can give a good prediction for the space shape of the post-tensioned and shaped dome and that the post-tensioning forces and member forces produced in the shape forming process are influenced greatly by the bending stiffness of duckbilled connector.So the bending stiffness of duckbilled connector should be simulated accurately, otherwise,it will produce large error in dealing with pin end or rigid end of chords.
Keywords:single-chorded plane space truss;post-tensioning;dome