Experimental and analytical investigation of component column web in shear under bending and axial force at elevated temperature

摘要

This paper presents an application of component-based methodology for modelling of semirigidrnsteel beam-to-column joints subjected to fire conditions. Recent experimental studies have shown thatrndegradation of material properties and high axial forces due to thermal expansion of the beam at elevatedrntemperature significantly affect their moment-rotation response. The component method has been adopted forrnevaluation of the joint behaviour at elevated temperature. Recently published mechanical models are limited byrnabsence of description of some components loaded by interaction of bending moment and axial force. Behaviourrnof the component column web in shear was investigated at the Czech Technical University in Prague. Presentedrnanalytical prediction model is compared to the experimental results which were obtained from tests on extendedrnend-plate connection at elevated temperature. Detailed finite element simulations of the tests were performedrnto widen the experimental study to other temperatures. Both the analytical and numerical predictions providernvaluable results.