Analyzing behavior of circular concrete-filled steel tube column using improved fuzzy models

Yuxin Zheng, Hongwei Jin, Congying Jiang, Zohre Moradi, Mohamed Amine Khadimallah and Hossein Moayedi

Abstract

Axial compression capacity (Pu) is a significant yet complex parameter of concrete-filled steel tube (CFST) columns. This study offers a novel ensemble tool, adaptive neuro-fuzzy inference system (ANFIS) supervised by equilibrium optimization (EO), for accurately predicting this parameter. Moreover, grey wolf optimization (GWO) and Harris hawk optimizer (HHO) are considered as comparative supervisors. The used data is taken from earlier literature provided by finite element analysis. ANFIS is trained by several population sizes of the EO, GWO, and HHO to detect the best configurations. At a glance, the results showed the competency of such ensembles for learning and reproducing the Pu behavior. In details, respective mean absolute errors along with correlation values of 4.1809% and 0.99564, 10.5947% and 0.98006, and 4.8947% and 0.99462 obtained for the EO-ANFIS, GWO-ANFIS, and HHO-ANFIS, respectively, indicated that the proposed EO-ANFIS can analyze and predict the behavior of CFST columns with the highest accuracy. Considering both time and accuracy, the EO provides the most efficient optimization of ANFIS and can be a nice substitute for experimental approaches.

Key Words

deformation demand; earthquake resistant design philosophy; limit states; structural damage states; levels of earthquake shaking

Address

Yuxin Zheng:School of Civil Engineering and Architecture, Zhejiang Guangsha Vocational and Technical University of Construction,Dongyang 322100, Zhejiang, China Hongwei Jin:School of Civil Engineering and Architecture, Zhejiang Guangsha Vocational and Technical University of Construction,Dongyang 322100, Zhejiang, China Congying Jiang:School of Civil Engineering and Architecture, Zhejiang Guangsha Vocational and Technical University of Construction,Dongyang 322100, Zhejiang, China Zohre Moradi:Faculty of Engineering and Technology, Department of Electrical Engineering, Imam Khomeini International University, 34149-16818 Qazvin, Iran Mohamed Amine Khadimallah:1)Prince Sattam Bin Abdulaziz University, College of Engineering, Civil Engineering Department, Al-Kharj, 16273, Saudi Arabia 2)Laboratory of Systems and Applied Mechanics, Polytechnic School of Tunisia, University of Carthage, Tunis, Tunisia Hossein Moayei:Faculty of Civil Engineering, Duy Tan University, Da Nang 550000, Vietnam

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