دانلود رایگان مقاله انگلیسی پیش بینی ظرفیت باربری فونداسیون دیواری سبک: یک روش شبیه سازی - اشپرینگر 2017

Abstract

In the recent past years, utilization of intelligent models for solving geotechnical problems has received considerable attention. This paper highlights the feasibility of adaptive neuro-fuzzy inference system (ANFIS) for predicting the bearing capacity of thin-walled foundations. For this reason, a data set comprising nearly 150 recorded cases of footing load tests was compiled from literature. Footing width, wall length-to-footing width ratio, internal friction angle, and unit weight of soil were set as inputs of the predictive model of bearing capacity. In addition, a pre-developed artificial neural network (ANN) model was utilized to estimate the bearing capacity of thin-walled foundations. The results recommend the workability of ANFIS in predicting the bearing capacity of thin-walled foundation. The coefficient of determination (R2 ) results of 0.933 and 0.875, and root mean square error (RMSE) results of 0.075 and 0.048 for training and testing data sets show higher accuracy and efficiency level of ANFIS in estimating bearing capacity of thin-walled spread foundations compared to the ANN model (R2= 0.710, RMSE = 0.512 for train, R2= 0.420, RMSE=0.529 for test). Overall, findings of the study suggest utilization of ANFIS, as a feasible and quick tool, for predicting the bearing capacity of thin-walled spread foundations, though further study is still recommended to enhance the reliability of the proposed model.

6 Conclusions

This paper investigated the feasibility of the ANFIS model for predicting the bearing capacity of thin-walled foundation mainly, because to the best knowledge of authors, no reported case was found in the literature in this regard. Footing width, wall length-to-footing width ratio, soil unit weight and internal friction angle of the soil form the inputs of the proposed model. 150 reported cases of footing load tests in the literature were used for model development purpose. The coefficients of determination (R2 ) equal 0.933 and 0.875 for training and testing data sets, respectively, recommended that the proposed predictive model can be implemented for predicting the bearing capacity of thin-walled foundation. In addition, comparison between ANFIS results and similar suggested models in the literature which are developed using the conventional ANN and GA-based ANN revealed that ANFIS-based predictive model works much better.