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《Journal of Building Structures》 2009-04
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Analysis and experimental study on ISFSL affected by sag-span ratio and rise-span ratio

WANG Cheng1,2,ZHANG Yigang2(1.National Center for Quality Supervision and Test of Building Engineering,China Academy of Building Research,Beijing 100013,China;2.Space Structures Research Center,Beijing University of Technology,Beijing 100124,China)  
In order to study the mechanical performance of internal stretch forming space lattice structure(ISFSL),twelve models with different the sag-span ratios and rise-span ratios,were found by taking sag-span ratio and rise-span ratio as design parameters.Mechanics performance about axial force,bending moment and section stress of ISFSL being influenced by rise-span ratio and rise-span ratio was fully analyzed by using ANSYS finite element program.Two experimental models with a long span of 4.8m were designed based on the analysis about ISFSL,tensioned forming and static loading were carried out.The characteristics of ISFSL affected by sag-span ratio and rise-span ratio were further studied,and the theoretical analysis results were verified.The study shows that sag-span ratio and rise-span ratio are the important factors which affect the structural property of ISFSL.Bending strain is the mainly mechanics performance in forming stage of ISFSL,and the increasing compressive strain in axial is the mainly mechanics performance in loading stage.Reasonable combination of sag-span ratio and rise-span ratio helps to improve structural performance of ISFSL.
【CateGory Index】: TU399
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