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Experimental and numerical analysis of beam to column joints in steel structures

Frontiers of Structural and Civil Engineering 2018年第4期12卷 642-661页

作者： Gholamreza ABDOLLAHZADEH Seyed Mostafa SHABANIAN Faculty of Civil Engineering Babol Noshirvani University of TechnologyBabolIran

The behaviors such as extreme non-elastic response, constant changes in roughness and resistance, as well as formability under extreme loads such as earthquakes are the primary challenges in the modeling of beam-to-column connections. In this research, two modeling methods including mechanical and neural network methods have been presented in order to model the complex hysteresis behavior of beam-to-column connections with flange plate. First, the component-based mechanical model will be introduced in which every source of transformation has been shown only with geometrical and material properties. This is followed by the investigation of a neural network method for direct extraction of information out of experimental data. For the validation of behavioral curves as well as training of the neural network, the experiments were carried out on samples with real dimensions of beam-to-column connections with flange plate in the laboratory. At the end, the combinational modeling framework is presented. The comparisons reveal that the combinational modeling is able to display the complex narrowed hysteresis behavior of the beam-to-column connections with flange plate. This model has also been successfully employed for the prediction of the behavior of a newly designed connection.

关键词： beam to column connections experiments component method neural network model combinational modeling

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Modeling of semi-rigid beam-to-column steel joints under extreme loading

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Frontiers of Structural and Civil Engineering 2013年第3期7卷 245-263页

作者： C FANG B A IZZUDDIN A Y ELGHAZOULI D A NETHERCOT Department of Civil&Environmental Engineering Imperial College LondonLondon SW72AZUnited Kingdom

Joints play an important role in providing ductility for steel-composite structures subject to extreme loading conditions,such as blast,fire and *** to sound energy dissipation capability and fabrication efficiency,semi-rigid joints have increasingly received attention during the last *** paper presents a component approach for modeling semi-rigid beam-to-column joints based on Eurocode3,where the post-elastic response,including component strain hardening and ultimate rotational capacity,is also *** criteria are defined based on the ultimate deformation capacity of components and *** model enables a direct integration of joint response into global frame models with the consideration of axial deformability,such that the interaction between bending moment and axial force within the joints can be realistically *** addition,elevated temperature can be considered in the joint model via the degradation of the component *** comparisons with available test data,the joint model is shown to have good accuracy,and the failure criteria are found to be reliable yet *** strain hardening response of components is shown to have significant influence on the ultimate bending capacity of the joints,while neglecting it usually leads to a conservative prediction.

关键词： semi-rigid joint component method ductility elevated temperature

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