Abstract
A new design of a radially retractable roof structure based on the concept of the suspen-dome is proposed in this paper. The radially foldable bar structure is strengthened by the lower cable-strut system to obtain a higher structural stiffness. Then the comparison of the static behavior between the retractable suspen-domes and their corresponding foldable bar shell with quadrangular mesh is discussed. Moreover, the effects of different structural and geometric parameters, such as the rise-to-span ratio, the cross-section area of beams, cables and struts, and the pre-stress level of the lower cable-strut system, on the nodal displacements and member forces are investigated systematically. The results show that higher structural stiffness is anticipated with the introduction of cable-strut systems into the hybrid structure. When the rise-to-span ratio is equal to 0.2, the maximal nodal displacement of the suspen-dome reaches the minimal value. The increase of the cross-section area of steel beams contributes an enormous amount to the structural stiffness. Increasing cable and strut sections has little impact on the mechanical behavior of suspen-domes. Moreover, the prestress level of cable-strut systems has a slight influence on the nodal displacements and member forces. Parametric analysis can be regarded as an essential basis for the optimization of the design of a retractable suspen-dome structure.
Highlights
The structural behaviors of single-layer domes are continually investigated [1,2,3,4], and stability remains amongst the challenges faced for longer spans [5]
The nodal displacements and axial forces in the steel beams of the retractable suspen-domes are compared with the single-layer foldable bar structure without any supporting cable-strut system
It can be found that the axial stresses in the steel bars are slightly lower in the suspen-dome, and the differences are more notable near the mid-span again in the case of Load 2
Summary
The structural behaviors of single-layer domes are continually investigated [1,2,3,4], and stability remains amongst the challenges faced for longer spans [5]. Among different types of systems interest of many practitioners, designers, andtheresearchers These basic[21,22], units consis those using angulated scissor-like elements These basic units consist of a angle as their rods rotate while maintaining the end pivots on parallel lines [24,25]. The current investigation was developed advance the foldabl merit ofTherefore, increased stability from suspen-dome systems;. 2, which is followed by a comparison of the static behavior between the retractable suspen-dome requirements
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