Interactive Design of Semirigid Steel Frames

Dhillon, Balaur S.; O'Malley, James

doi:10.1061/(asce)0733-9445(1999)125:5(556)

Cited by 52 publications

(28 citation statements)

References 2 publications

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“…A two storey, one-bay frame with fixed bases used by Chen [14] as well as Dhillon and OÕmalley [15], as shown in Fig. 5(a), was used to validate the program.…”

Section: Structural Analysismentioning

confidence: 99%

Numerical study on semi-rigid racking frames under sway

Abdel-Jaber

Beale

Godley

2005

Computers & Structures

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“…A two storey, one-bay frame with fixed bases used by Chen [14] as well as Dhillon and OÕmalley [15], as shown in Fig. 5(a), was used to validate the program.…”

Section: Structural Analysismentioning

confidence: 99%

Numerical study on semi-rigid racking frames under sway

Abdel-Jaber

Beale

Godley

2005

Computers & Structures

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“…Due to their economic advantages, semi-rigid frames are often a subject of both empirical and theoretical research. Numerous papers have been published so far concerning semi-rigid joints (e.g., Chen et al 2011;Kozłowski 1999;Lorenz et al 1993), as well as frames constructed with them (e.g., Chen et al 1996;Dhillon and O'Malley 1999;Galea 1987).…”

Section: Introductionmentioning

confidence: 99%

Influence of Supporting Joints Flexibility on Statics and Stability of Steel Frames

Krystosik

2018

Int J Steel Struct

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The paper presents an influence problem of the rotational flexibility of supporting joints on steel frames behaviour. A substantial part of the paper is devoted to, neglected in the engineering practice, issue of rotational flexibility of the foundationsubgrade system. This problem was analyzed on the assumption that the foundation in the form of a rectangular rigid punch rests on a homogeneous medium of finite depth. Suitable analyses of the foundation were done using several subgrade models: Winkler's model, elastic half-space (in the classic approach) and with the use of the boundary element method, as well as HS model (hardening soil) by application of the finite elements method. The phenomenon of rotational flexibility of footings resting on a soil subgrade was analyzed within the linear range. It was shown, that the practical assessment of rotational stiffness of footings resting on subgrade can also be performed by using simple methods (e.g., based on the Winkler's model).The presented evaluation methods of the whole flexibility supported joints were used in the static and stability analyses of the certain steel frame. The presented results confirmed a significant influence of the flexibility of the supporting joints on the steel frames behaviour.

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“…These models accurately characterise the connections at both sides of the joint, but do not consider the panel deformations due to shear, bending and/or compressive forces. Other zero length semi-rigid spring elements have been proposed for analysis of steel [9][10][11] and composite [12] frames. Early experimental studies [13] and more recent research [14][15] have stressed the need for a correct definition of the panel zone deformations due to their influence on the overall sway behaviour of the frames.…”

Section: Introductionmentioning

confidence: 99%

03.28: Performance of cruciform finite elements that model 2D steel joints with beams of unequal depth in frame analysis

2017

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This paper deals with the performance evaluation of cruciform finite elements with 4 nodes and 12 degrees of freedom that model 2D steel joints with beams of unequal depth in frame analysis. These elements are capable of modelling joints that have double rectangular panels, with or without horizontal stiffeners in the panel zone, due to beams of different depths at both sides of the joint. In addition, these cruciform elements are suitable for simple, rigid and semi-rigid connections and therefore can be used for the global analysis of semi-rigid steel frames. The performance of these elements is assessed by analysing steel frames under different loading conditions, and comparing the results with complete finite element models.The characteristics of these elements (stiffness and resistance) are generated by a previously proposed displacement based modal approach. All the forces and moments coming from the adjacent beams and columns concur at the joint, therefore, the complete force field in the panel zones is known with no need for a transformation parameter EC3-Part 1.8). The proposed element also avoid the use of mechanical models (composed of springs and rigid bars) for frame analyses, which add complexity, numerical overhead -consequence of the larger number of degrees of freedom-and possible round off errors (due to the rigid bars) in the solution process.In addition, since the real dimensions of the joint are included in the proposed elements, the eccentric moments are automatically taken into account. Also, the interaction between the deep and the shallow sides of the column double panels are considered. Numerical simulations and comparison with complete finite element models are carried out that show the validity and computational efficiency of these elements.

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Interactive Design of Semirigid Steel Frames

Cited by 52 publications

References 2 publications

Numerical study on semi-rigid racking frames under sway

Numerical study on semi-rigid racking frames under sway

Influence of Supporting Joints Flexibility on Statics and Stability of Steel Frames

03.28: Performance of cruciform finite elements that model 2D steel joints with beams of unequal depth in frame analysis

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