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مجله تحقیقات فولاد ساختمانی
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • refined plastic-hinge model for analysis of steel-concrete structures exposed to fire

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    • تاریخ ارائه: 1394/01/01
    • تاریخ انتشار در تی پی بین: 1394/01/01
    • تعداد بازدید: 538
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     this paper is concerned with the application of a proposed approach, denoted as saafeprogram (system for advanced analysis for fire engineering), developed to provide inelastic analysis of steel and composite (steel-concrete) 2d framed-structures exposed to fire. the method, although similar in concept to earlier plastic-hinge approaches, differs in relation to both numerical methodology and precision, allowing accurate description of the structural non-linear response with little computational effort, when compared to that of the general fem formulation. the analysis is based on the two-level approach, in which the cross-section and member are continuously performing in an interactive way. the variation on member is performed by a transient heat-transfer analysis model, accounting for thermo-dependent properties of heated materials. a second-order plastic-hinge model is formulated in a succinct format considering yielding progress during fire and accurate identification of member instability. obtained results for calibration examples are compared to those of the fem approach, showing reasonable agreement. a proposed multi-storey composite framed structure is assessed by saafe, outlining the advantage of considering advanced analysis in the current fire-design practice of structures.

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