Research on Distribution and Magnitude of Initial Geometrical Imperfection Affecting Stability of Suspen-Dome

Guo, Jing

doi:10.18057/ijasc.2011.7.4.3

Cited by 9 publications

(7 citation statements)

References 4 publications

(4 reference statements)

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“…Guo et al [19] focused on the distribution and magnitude of initial geometrical imperfection during stability calculation, based on numerical models and different distribution of initial geometrical imperfection. The result showed that the stability factor was lower when the first antisymmetric buckling mode was developed.…”

Section: Previous Researchesmentioning

confidence: 99%

Suspen-Dome System: A Fascinating Space Structure

Olofin¹,

Liu²

2017

TOCIEJ

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Abstract:With the recent trend in long span space structures, suspen-dome as a roof structure is becoming popular. Therefore, as the construction of long span structures increases in the world today, the effectiveness of suspen-dome structure should be considered in order to undertake further development of the system which may be required to improve its design and construction. One direction of the improvement of such structures is to seek new materials other than using the traditional steel to yield better results. This paper is a review of the suspen-dome system, including its characteristics, its use in space construction, its success as well as the possibility of replacing steel with other materials for better results. From the review, it is found that using steel cables in suspen-dome structure has some shortcomings which can be eliminated by the use of other materials. It is suggested that Carbon Fibre Reinforced Polymer (CFRP) can be the material because of its advantages over steel as indicated in the paper.

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Section: Previous Researchesmentioning

confidence: 99%

Suspen-Dome System: A Fascinating Space Structure

Olofin¹,

Liu²

2017

TOCIEJ

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“…e static and dynamic performance of cable-supported barrel vault (CSBV) structures has been investigated using numerical and experimental methods, and superior static and dynamic performance compared to barrel vault structures has been demonstrated [2,3]. In addition, a series of theoretical analyses and experimental studies have been carried out on the string structure, including form-finding analyses [4][5][6], structural optimization [7,8], static behavior analyses [9][10][11], dynamic characteristics and seismic response analyses [12], prestress design methods [13], sensitivity analyses [14], and stability studies [15][16][17][18]. As a critical load-carrying member of CSBV structures, the cables are of primary importance for guaranteeing the safety of the entire structure.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigation of the Mechanical Behavior of Cable‐Supported Barrel Vault Structures with Varying Temperature

Sun

Chen

et al. 2019

Advances in Civil Engineering

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The cable-supported barrel vault (CSBV) structure system is a new type of hybrid spatial steel structure based on a beam string structure (or truss string structure), suspendomes, and cylindrical lattice shells. Steel cables (e.g., steel wire rope cables, steel strand cables, semiparallel steel tendons, and steel rods) are key components of CSBV structures. However, they have different elastic moduli and thermal expansion coefficients. In this study, the roof of a textile workshop (the first CSBV structure in China) was analyzed with four types of cables under the effect of varying temperature. Under half-span loading and full-span loading, the structural internal force and displacement at varying temperatures were obtained from finite element models employing four different types of steel cables. The internal force, displacement, and horizontal arch thrust changed linearly with increasing temperature. Moreover, the dynamic characteristics of CSBV with varying temperature were analyzed. The frequency of the CSBV changed linearly with increasing temperature. Based on the dynamic characteristics of CSBV with varying temperature, a seismic response time-history analysis was performed. The variation in the maximum responses of the internal force, displacement, and horizontal arch thrust was obtained. In each case, the mechanical behavior of the CSBV with semiparallel steel tendon cables was strongly affected by the temperature. Therefore, semiparallel steel tendons are not recommended as components of CSBV in cases where large temperature changes can be expected. Thereafter, a scale model of a CSBV was designed and used for experiments and corresponding finite element analyses under varying temperature. Experimental results show that the finite element method is effective for analyzing the mechanical behavior of CSBV under varying temperature.

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“…[9,10]. Nevertheless, some researchers [11,12,13] have obtained lower failure loads adopting higher mode shapes as the imperfection. The EIM can be extended by shaping the imperfection according to a linear combination of two or several mode shapes.…”

Section: Introductionmentioning

confidence: 99%

“…Bearing in mind that a spherical cap with L = 30.5 m is adopted in [16], a very small imperfection amplitude of about L/10000 follows. Face to such a variability, a number of recent parametrical studies [14,8,13,15,18,7] have investigated the sensitivity of the SLGS instability to the EGNI amplitude. In the cited studies, the sensitivity of the Load Factor (LF), i.e.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Equivalent Geometric Nodal Imperfections on the stability of single layer grid shells

Bruno

Sassone

Venuti

2016

Engineering Structures

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The present paper discusses the sensitivity of the global and local stability of a hybrid single layer grid shell to a set of equivalent geometric nodal imperfections representative of the actual structural and construction imperfections. Since imperfections are hard to be measured and controlled in experimental facilities, the stability of the structure is extensively investigated in numerical experiments. The imperfections are set by means of the so-called Eigenmode Imperfection Method. The method parameter space is densely sampled, and different structural models are adopted. The results are given in terms of two bulk parameters: the well established Load Factor and the proposed Buckling Shape Length, the latter being introduced to provide a continuous measure of the degree of "globalness" of the instability. Significant and non monotonic changes in both the Load Factor and Buckling Shape Length are observed versus the growth of the imperfection amplitude. Further, a local metrics of the grid shell geometry, named nodal apex, is introduced for each structural node. Special emphasis is given to the analysis of the correlation between the apex of the initial imperfect geometry and the apex of the deformed shape at collapse. The observed high correlation suggests that the mechanical behaviour of the imperfect grid shell is significantly influenced by this local geometrical feature.

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Research on Distribution and Magnitude of Initial Geometrical Imperfection Affecting Stability of Suspen-Dome

Cited by 9 publications

References 4 publications

Suspen-Dome System: A Fascinating Space Structure

Suspen-Dome System: A Fascinating Space Structure

Numerical and Experimental Investigation of the Mechanical Behavior of Cable‐Supported Barrel Vault Structures with Varying Temperature

Effects of the Equivalent Geometric Nodal Imperfections on the stability of single layer grid shells

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