Retrofitting Bolted Flange Plate (BFP) Connections Using Haunches and Extended End-Plates

سال انتشار: 1403
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 113

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شناسه ملی سند علمی:

JR_CEJ-10-8_003

تاریخ نمایه سازی: 8 مهر 1403

چکیده مقاله:

In Indonesia, one of the most common forms of connection is the Bolted Flange Plate (BFP) moment connection. Nevertheless, their current setups do not satisfy the strict requirements outlined in AISC ۳۵۸-۲۲. Therefore, this study uses advanced sub-assemblage numerical modeling simulations using ANSYS software to propose a novel way to integrate a half WF extended end-plate connection and trapezoidal haunch in order to fortify BFP moment connections, which does not meet the requirement required by AISC ۳۵۸-۲۲. Methodologically, the research entails comprehensive modeling and analysis of the proposed retrofit scheme. Six distinct connection models were scrutinized: the BFP-UR representing the existing connection extracted from a structure in Surabaya; the BFP-R۴E and BFP-R۴ES models, embodying connection retrofits with a half WF extended end-plate; and the BFP-RTR and BFP-RSTR models, embodying connection retrofits with a trapezoidal haunch. Additionally, the BFP-RTRE model integrates both an extended end plate and a trapezoidal haunch in the retrofit scheme. The analytical findings unveil that the proposed strengthening paradigm manifests heightened and superior rotational moment characteristics relative to the pre-reinforcement configuration, albeit encountering stiffness degradation attributable to buckling effects on the main beam. Notably, the analysis indicates that degradation ensues when rotational displacement exceeds ۴%, with only the BFP-RTR and BFP-RSTR models exhibiting degradation at a ۳% rotation threshold. Crucially, the connections demonstrate the capability to withstand ۸۰% of the beam’s plastic moment under a ۴% rotational displacement, thereby aligning with the stringent requisites delineated in AISC ۳۴۱-۲۲. Doi: ۱۰.۲۸۹۹۱/CEJ-۲۰۲۴-۰۱۰-۰۸-۰۳ Full Text: PDF

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