The Guidelines for Modelling the Preloading Bolts in the Structural Connection Using Finite Element Methods

Abstract

The aim of this paper is the development of the two different numerical techniques for the preloading of bolts by the finite element method using the software Abaqus Standard. Furthermore, this paper gave detailed guidelines for modelling contact, method for solving the numerical error problems such as numerical singularity error and negative eigenvalues due to rigid body motion or the problem of the extensive elongation of bolts after pretension which is occurring during the analysis. The behaviour of bolted joints depending on the two different approaches of pretension was shown on the example of an extended end-plate bolted beam-to-column connection under the monotonic loading. The behaviour of beam-to-column connection was shown in the form and moment-rotation (M-ϕ) curves and validated by experimental test. Advantages and disadvantages of pretension techniques, as well as the speed of numerical models, were also presented in this paper.

Capacity Evaluation of Eight Bolt Extended Endplate Moment Connections Subjected to Column Removal Scenario

“…4 Finite element model of specimen EP Due to complex numerical problems in finite element modeling, contacts between system components usually need special care, so small surface-to-surface sliding was used in all system component interactions. In this sliding process, only in the initial stage, the contact defined between the master and slave nodes [26]. It should be noted that the contacts were defined between different part of the system like the column flange and endplate, the bolt nuts and heads with column flange and endplate, and the hole and bolt shanks of both column flange and end plate by surface to surface formulation to simulate component's interaction.…”

Advanced joint slip model for single-angle bolted connections considering various effects

“…Although this method is much easier and straightforward, the numerical problems such as extensive elongation of bolts after pretension might be encountered in the implicit technique. Therefore, it requires intelligent contact configurations with greater concern in the modeling procedures (Krolo et al, 2016; Selamet and Garlock, 2010).…”

Analiza ponašanja čeličnog priključka stupa i nosača u vijčanoj izvedbi primjenom metode komponenata

“…Rezultati dobiveni metodom komponenata uspoređeni su s rezultatima ponašanja dobivenih numeričkim simulacijama koje su proveli Krolo i sur. (2016) [5] te rezultatima laboratorijskih ispitivanja za uzorak SC3 koje su proveli autori Shi i sur. (2010) [6].…”

“…Osim toga, određena je početna rotacijska krutost priključka otpornost priključka na savijanje te prikazani modeli priključaka s oblicima otkazivanja. Rezultati dobiveni metodom komponenata su uspoređeni s rezultatima dobivenim numeričkim simulacijama iz [5] te rezultatima laboratorijskih ispitivanja iz [6].…”

“…Krolo, L. Zajec • Analiza ponašanja čeličnog priključka stupa i nosača u vijčanoj... c) Slika 8. Oblici otkazivanja priključaka (lijevo) te M -ϕ dijagrami (desno) dobiveni a) metodom komponenata, b) numeričkim simulacijama prema Krolo i sur [5]. i laboratorijskim ispitivanjima prema Shi i sur [6].…”