Neural networks assessment of beam-to-column joints

Abstract

This paper proposes the use of artificial neural networks to predict the flexural resistance and initial stiffness of beam-to-column steel joints using the back propagation supervised learning algorithm. Three types of steel beam-to-column joints were investigated: welded, endplate and bolted with top, seat and double web angles, respectively. The neural networks results proved to be consistent with experimental and design code reference values

Mechanical model for the analysis of steel frames with semi rigid joints

“…De Lima et al [13] used the concept of neural networks to determine the initial stiffness of beam-to-column joints. However, the method was limited in scope and the authors did not back their results with test data to validate the method developed.…”

Behavior appraisal of steel semi-rigid joints using Linear Genetic Programming

“…12(a-f). A comparison of the ratio between the predicted initial rotation stiffness values by the LGP single and team solutions and likewise those obtained from European design code, ANNs [16], GP/SA [27,28], Kishi et al [3] and experimental values are illustrated in Figs. [13][14][15].…”

“…The database contains 33 flexural resistance and initial rotational stiffness of welded joint test results [16], given in Table 2. The inputs for LGP, shown in Fig.…”

“…Some investigators have concentrated on predicting the beamcolumn steel joints behavior using Artificial Neural Networks (ANNs) [12][13][14][15][16]. In spite of the generally successful performance of ANNs, they are black-box models that do not give a deep insight into the process of using available information to obtain a solution.…”

“…LGP technique has never been applied to the joint behavior prediction. Further, a comparison between the proposed LGP models, Eurocode 3 reference values and other existing models, ANNs [16], GP/SA [27,28], and Kishi et al [3], joint initial rotation stiffness S j,ini,LGP joint initial rotation stiffness predicted by linear genetic programming S j,ini,exp experimental joint initial rotation stiffness S j,ini,EC 3 Eurocode 3 joint initial rotation stiffness is performed. A reliable database including previously published flexural resistance and initial rotational stiffness of beam-column steel joint test results is utilized to develop the proposed models.…”