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Vol. 49 (2008) No. 2 August n. 158


Experimental and Numerical Simulation Study on Load Carrying Capacity of K8 Single-Layer Reticulated Domes with Semi-Rigid Joints

< Table of Contents for Vol. 49 (2008) No. 2 August n. 158
  • Journal Name: Journal of the International Association for Shell and Spatial Structures (J. IASS)
  • ISSN: (Electronic Version) 1996-9015
  • ISSN: (Print Version) 1028-365X
  • Issue: Vol. 49 (2008) No. 2 August n. 158
  • Pages: 99-110
  • Title: Experimental and Numerical Simulation Study on Load Carrying Capacity of K8 Single-Layer Reticulated Domes with Semi-Rigid Joints
  • Author(s): H.H. Ma, F. Fan, S.Z. Shen
  • Keywords: Semi-rigid join system; bolt-ball joint system; numerical simulation; contact element; K8 single layer reticulated dome
Abstract
In order to evaluate the performance of a single-layer reticulated domes with bolt-ball joints, both experimental study and numerical simulation were done, using contact elements (target170 and contact 173) and solid element (solid 45) in ANSYS, to establish the bending stiffness curves of bolt-ball joints. The good agreement between simulation and experimental results indicates that numerical simulation is an accurate and effective way to evaluate the mechanical properties of a bolt-ball joint system. Using nonlinear beam element (beam 189 element) with end spring elements (combin39) in the software ANSYS, the K8 single-layer reticulated domes with bolt-joint joints are analyzed based on several different parameters including bend-stiffness, ratio of rise to span, rotation-stiffness, ball size, asymmetric load distribution, tube section, support condition and initial imperfection. The results of these analyses prove that the critical load of the dome with bolt-ball joints are much larger then that with pin-joints, and the geometric parameters of bend-stiffness of joint, ratio of rise to span and section of tube are major factor having influences on the critical load of these domes.

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