ANFIS-Based Accurate Estimation of the Confinement Effect for Concrete-Filled Steel Tubular (CFST)
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ANFIS-Based Accurate Estimation of the Confinement Effect for Concrete-Filled Steel Tubular (CFST) S. Balasubramanian1 • J. Jegan2 • M. C. Sundarraja3
Received: 23 October 2018 / Revised: 11 March 2020 / Accepted: 31 May 2020 Taiwan Fuzzy Systems Association 2020
Abstract This research is mainly focused on the accurate estimation of the confinement effect for the concrete-filled steel tubular (CFST) that makes it possible to evaluate the interaction between various parameters that affect the confinement effect. To do that, the CFST is analyzed with concrete and steel properties using ANFIS method. With respect to the shape of the CFST, both the circular and rectangle shapes are considered. Only then, the D/t ratio is increased and reduced the hoop stress, self-stress in the steel tube. To analyze the D/t ratio, the confinement effect and axial load capacity is determined. After that, the concrete strength is also analyzed according to their statistical measures like output target ratio (OTR), precision, efficiency, mean value (MV), mean square error (MSE), standard deviation (SD), etc. The proposed method is implemented in MATLAB platform and compared with the Artificial Neural Network (ANN) method. The proposed ANFIS method achieved a good prediction of the confinement effect and axial load capacity of the CFST. Keywords Concrete-filled ANFIS CFST column Short and long D/t ratio ANN Load capacity OTR SD MV
& S. Balasubramanian [email protected] 1
Mohamed Sathak Engineering College, Kilakarai, India
2
Faculty of Civil Engineering, University College of Engineering & Technology, Ramnad Campus, Ramanathapuram, India
3
Faculty of Civil Engineering, Thiagarajar College of Engineering, Madurai, India
1 Introduction Recent years, Concrete-filled steel tubular (CFST) is widely used in many large-span constructions. The mutual merits of concrete and steel materials with outstanding performance are documented using the member of concrete-filled steel tubular (CFST) [1]. Therefore, the girder steel and floor slabs contain the dependable relation in CFSTs and the architecture of side seismic load system resisting is included. The well suitable ductility production, more energy absorption, high axial load capacity, and low strength degradation become the main effect in mechanical performances [2–5]. Generally, the structural columns are most important due to the growing up of taller, lighter and well quick building up of structure. In the earliest lengthy civilization become dependent on the well-known columns because of the high load sustainability of masonry octagonal columns, such as high and big temples. The beam CFST columns are the key amalgamation application of concrete members and steel members individually. Increasing popularity gaining can be obtained from the various constructive space usage of CFST [6–9]. This is the most popular kind of constructive composites with more engineering compensation practices [10]. Similarly, the concrete core of confinement is obtained from the s
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