Recently, scientists have used different soft computing models for estimating various civil engineering characteristics, since they are economical, reliable, and time-saving. Among all, Adaptive Neuro-Fuzzy Inference System (ANFIS) and Artificial Neural Network (ANN) have been the most efficient ones, which are used by scientists in multiple occasions. This study is the comprehensive review on capability of ANFIS and ANN models in predicting different civil engineering characteristics.
Keywords: Artificial neural network; Neuro-fuzzy inference system; Fuzzy inference system
Recently, various data-driven models such as ANFIS and ANN and their hybrids have been used for predicting various civil engineering characteristics. ANN is a data processing system which learns from the examples to get to a specific problem . In addition, ANFIS is a famous hybrid neuro-fuzzy method for modeling nonlinear complex structures which incorporates the adaptive learning algorithm of ANN with the reasoning capability of fuzzy inference system (FIS) . The structures of ANN and ANFIS are shown in Figures 1 & 2, respectively.
Scientists have used the applications of ANN and ANFIS models successfully in various occasions in the field of Civil Engineering. Nazari et al.  have used ANFIS effectively in estimating ductile to brittle transition temperature offunctionally graded steel. Prasad et al.  have developed ANFIS productively in predicting the air quality and input optimization to be able to save cost and time. Khademi et al.  have used ANN and ANFIS models successfully in estimating the 28 days compressive strength of concrete, however, they also concluded that ANN is more capable than ANFIS in such a prediction purposes. Boga et al. 2013 evaluated the mechanical and chloride permeability properties of concrete containing GGBFS and CNI through ANN and ANFIS techniques efficiently .
As a result, Adaptive Neuro-Fuzzy Inference System (ANFIS) and Artificial Neural Network (ANN) are found to be reliable in predicting different characteristics in the field of Civil Engineering and are being used by different scientists around the world [1-6]. Using these soft computing models are economical, time-saving, and easy to be used which would be the solution for many projects which these parameters are important in them.