Zur Berechnung von Verbundrahmen mit nachgiebigen Verbundknoten

Tschemmernegg, F; Jf, Bergmann; Marcher,

doi:10.1002/stab.199801870

Cited by 2 publications

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“…However, due to the huge computational costs, the finite element method is not suitable for practical engineering design, especially when global frame analysis is required. The concept of the component-based method, in which a connection is divided into several components with known stiffnesses and strengths, was first proposed in 1980s [5], and then adopted in the design guidance [6]. Jaspart [7] summarized three principal steps of the componentbased method, which are (i) the identification of active components (such as endplate in bending, column web in compression, column flange in bending, bolts in tension); (ii) the characterisation of the active components, and (iii) the assembly of the active components into a connection model.…”

Section: Introductionmentioning

confidence: 99%

A numerical study on the structural performance of a ductile connection under fire conditions

2021

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The component‐based model of a novel ductile connection has been incorporated into the software Vulcan in order to facilitate global frame analysis within a performance‐based structural fire engineering design process. This paper reports on the validation and verification of the model, as well as the applications of the model in order to investigate the effects of the ductile connections on the structural responses of long‐span frames at high temperature. Firstly, three single‐beam models with the novel connections at both ends, connected to rigid supports, are used to verify that the component‐based connection model has been correctly incorporated into Vulcan, via comparisons against detailed finite element modelling with Abaqus. The structural performance in fire of long‐span frames with the novel ductile connections has been compared with the performance of the same frames with idealized rigid, idealized pinned and conventional end‐plate connections, initially using a limited sub‐frame model. Results show that, compared with the above mentioned three connection types, the ductile connection provides much higher axial and rotational ductilities to accommodate the deformations generated by the connected beams as their temperatures rise. As part of this process, these connections are instrumental in greatly reducing the axial forces to which the surrounding structure is subjected. Finally, parametric studies varying several key parameters have been carried out, in order to optimize the design of the ductile connection to enhance its performance subject to catenary action at very high temperature to prevent potential connection fracture and progressive collapse.

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Section: Introductionmentioning

confidence: 99%

A numerical study on the structural performance of a ductile connection under fire conditions

2021

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“…An alternative simplified method that deals with the complexity of steel beam-to-column joints is the so-called component method (CM) coded in EC3-1-8 [3]. This method evolved from the work by Zoetemeijer [4] on bolted beam-to-column steel joints in the 1970s, which was subsequently extended by the Tschemmernegg's research group [5,6], Jaspart [7], Weynand et al [8] and several others -a thorough review of these developments may be found in Jaspart and Weynand [9].…”

Section: Introductionmentioning

confidence: 99%

Cyclic behaviour of steel beam‐to‐column joints and calculation tools

et al. 2021

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The seismic design of dissipative beam‐to‐column steel joints is currently allowed in Eurocode EN1998 only when supported by tests due to the lack of reliable models for predicting their behaviour under cyclic conditions. On the other hand, the well‐known component method coded in EN 1993‐1‐8 (EC3‐1‐8) only applies to monotonic response of the joints. In this paper, an extension of this method, cyclic component method (CCM), is presented, which was developed and implemented for cyclic conditions in the scope of the research project EQUALJOINTS. The CCM was developed to predict the joints moment‐rotation behaviour for a wide range of joint configurations by properly combining cyclic force‐elongation behaviour of relevant components using the Modified Richard‐Abbott model. The step‐by‐step development and implementation of the CCM addresses (i) widespan variety of joint configurations and (ii) is fully compatible with the prescriptions in EC3‐1‐8. An example of application of the method is shown for an end‐plate beam‐to‐column steel beam‐to‐column joint, highlighting the level of accuracy achieved so far in the simulations of the cyclic behaviour of joints. The work performed so far shows promising results and good perspectives for new developments, which are identified making use of evidence from the results of the application example.

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Zur Berechnung von Verbundrahmen mit nachgiebigen Verbundknoten

Cited by 2 publications

References 0 publications

A numerical study on the structural performance of a ductile connection under fire conditions

A numerical study on the structural performance of a ductile connection under fire conditions

Cyclic behaviour of steel beam‐to‐column joints and calculation tools

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