Volume 7, Issue 5 (May 2010)

    Modeling of Crack Propagation in Weld Beam-to-Column Connections Submitted to Cyclic Loading with a Cohesive Zone Model

    (Received 18 May 2009; accepted 20 April 2010)

    Published Online: 2010

    CODEN: JAIOAD

      Format Pages Price  
    PDF 15 $25   ADD TO CART


    Abstract

    During the earthquakes in Japan and California in the 1990s, cracks appeared in some weld beam-to-column connections of heavy rigid frame steel buildings. This prompted the necessary assessment of the performance of weld connections in terms of rotation capacity and crack propagation. In the present study, experimental tests were performed where weld connections were submitted to cyclic loadings with increasing amplitude until a macrocrack event was reached. However the crack phenomenon depends on many parameters: The geometry, the material, the welding process…. For this reason, it was interesting to develop a finite element modeling of these connections in order to complete these experiments and perform a parametric study. This paper describes the finite element model development, its material parameter identification, and its comparison with experimental results. The weld connections were modeled by using three-dimensional mixed solid elements. The constitutive laws applied were elastoplastic with isotropic hardening identified for the base metal and the weld metal. Crack propagation was modeled by a cohesive zone model. The parameters of this cohesive zone model were identified by an inverse method with the modeling of three-point bending tests of pre-cracked samples performed on the base and weld metals. The fatigue damage generated by the cyclic loading was computed by the fatigue continuum damage model of Lemaitre and Chaboche, which was coupled with the cohesive zone model.


    Author Information:

    Lequesne, Cédric
    Dept. of ArGEnCo, Univ. of Liège, Liège,

    Plumier, André
    Dept. of ArGEnCo, Univ. of Liège, Liège,

    Duchêne, Laurent
    Dept. of ArGEnCo, Univ. of Liège, Liège,

    Habraken, Anne Marie
    Dept. of ArGEnCo, Univ. of Liège, Liège,


    Stock #: JAI102531

    ISSN: 1546-962X

    DOI: 10.1520/JAI102531

    ASTM International is a member of CrossRef.

    Author
    Title Modeling of Crack Propagation in Weld Beam-to-Column Connections Submitted to Cyclic Loading with a Cohesive Zone Model
    Symposium Ninth International ASTM/ESIS Symposium on Fatigue and Fracture Mechanics (37th ASTM National Symposium on Fatigue and Fracture Mechanics), 2009-05-22
    Committee E08