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IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints


IASS Symposium 2014

SESSION: General 3: Case Studies

Structural system selection and structural design for a giant ellipsoid large-span steel roof

< Table of Contents for General 3: Case Studies
  • Proceedings Name: IASS-SLTE Symposium 2014: Shells, Membranes and Spatial Structures: Footprints
  • ISSN: (Electronic Version) 2518-6582
  • Session: General 3: Case Studies
  • Title: Structural system selection and structural design for a giant ellipsoid large-span steel roof
  • Author(s): Zheng ZHANG, Jiemin DING, Songlin WANG
  • Keywords: giant structural system, flattened ellipsoid, structural system selection, suspendome, overall stability, ultimate bearing capacity
Abstract
The architectural shape of the Water Pavilion in Shaoxing Business Centre is a giant ellipsoid with the span of 227m in major axis and 127m in short axis and about 30m in height. The central region of the ellipsoid has a flat shape, which is dominated by bending effect and has a weak shell effect. The peripheral area with large curvature presents the mechanical performance under the compression-bending. The shell effect in the peripheral area is relatively significant. Huge span and flat shape bring great challenges to the structural system selection and structural design,namely how to choose a structural system which has clear force transmission pathway,efficient mechanical performance,good behavior in meeting the architectural aesthetic requirements and fitting the characteristics of the ellipsoid shape under the premise of large-span. After comparison and optimization among schemes,the steel truss-suspendome-reticulated shell-combination structural system is applied in the final,which consists radial main trusses,the central ring truss,the central suspendome and sub-regional single-layer lamella lattice shells. The selection and optimization of structural system is mainly elaborated. The structure layout,static and dynamic characteristics,temperature effect performance,overall stability and ultimate bearing capacity of the steel roof structure are introduced. Besides,the design and analysis of bearing and typical nodes is presented. The results reveal that the adoption of steel truss-suspendome-reticulated shell-combination structural system can effectively meet thestructural and architectural aesthetic requirements under the condition of super-long span.

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