BUCKLING BEHAVIOR AND STRENGTH ESTIMATION OF SINGLE LAYER HP LATTICE SHELLS WITH LOADING IMPERFECTION AND GEOMETRICAL INITIAL IMPERFECTION

In order to analyze the buckling behavior of lattice shells stiffened by cables or slender braces without pre-tension, it is necessary to consider the no-compression property of braces. This paper proposes an innovative method of linear buckling analysis that considers the no-compression property of braces. Moreover, in order to examine the proposed method's validity, its results are compared with the results from a nonlinear buckling analysis with geometrical nonlinearity and material nonlinearity to express the no-compression property of braces. The results show that the proposed method can well-predict the buckling behaviors of lattice shells stiffened by tension braces.

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Seismic performance of single layer steel cylindrical lattice shells

Journal of Constructional Steel Research ◽

10.1016/j.jcsr.2019.105772 ◽

2019 ◽

Vol 163 ◽

pp. 105772 ◽

Cited By ~ 2

Author(s):

F. Cedrón ◽

A.Y. Elghazouli

Keyword(s):

Seismic Performance ◽

Single Layer ◽

Layer Steel ◽

Lattice Shells

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Imperfection Sensitivity Analysis of Double Domes Free Form Space Structures

International Journal of Structural Stability and Dynamics ◽

10.1142/s0219455414500679 ◽

2015 ◽

Vol 15 (04) ◽

pp. 1450067 ◽

Cited By ~ 7

Author(s):

Mehdi Abbasi Mousavi ◽

Karim Abedi ◽

Mohamadreza Chenaghlou

Keyword(s):

Finite Element ◽

Limit Equilibrium ◽

Single Layer ◽

Initial Imperfection ◽

Free Form ◽

Space Structures ◽

Equilibrium Path ◽

Imperfection Sensitivity ◽

Step Method ◽

Buckling Modes

This paper investigates the effects of applying different buckling modes obtained by linearized eigenvalue buckling analysis as the initial imperfection for double domes free form space structures. Nonlinear elastic–plastic analysis of rigidly jointed single layer double domes are carried out using the finite element method. Having verified the finite element modeling, several different collapse analyses have been undertaken in order to examine the stability behavior of these structures. By using the approximate-perturbed method, the results of the analyses show that in free form double domes, the lowest buckling modes could not be considered as the effective modes to change the bifurcation equilibrium path into the limit equilibrium one. Therefore, the generalized conformable imperfection mode method has been suggested in the present study in order to apply geometric imperfections in free form double domes. Also, one step method has been suggested in order to eliminate 60% of buckling modes, which are nonsensitive, before applying the approximate-perturbed method.

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Elastic Buckling Analysis of Rigidly Jointed Single Layer Reticulated Domes with Random Initial Imperfection

International Journal of Space Structures ◽

10.1177/026635119200700404 ◽

1992 ◽

Vol 7 (4) ◽

pp. 265-273 ◽

Cited By ~ 10

Author(s):

Toshiro Suzuki ◽

Toshiyuki Ogawa ◽

Kikuo Ikarashi

Keyword(s):

Single Layer ◽

Initial Imperfection ◽

Random Variable ◽

Buckling Analysis ◽

Buckling Load ◽

Mode Shapes ◽

Elastic Buckling ◽

Nonlinear Buckling ◽

Reticulated Domes ◽

Nonlinear Buckling Analysis

In the present paper, the effect of imperfection on the elastic buckling load and mode shapes of externally-loaded single layer reticulated domes is investigated. The types of buckling concerned here are the general buckling, the local (dimple) buckling and the buckling of a member. As to the geometric parameter of a dome, the slenderness factor S is adopted which represents the openness and slenderness of the dome. The maximum value of the imperfection is assumed to be the normal random variable. The buckling loads are computed by the linear and the nonlinear buckling analysis using the finite element method. The statistical values are calculated by the three-points estimates method. The main points of interest are the influence of the shape and the extent of an imperfection on the buckling load.

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