Life prediction of RC underground structure by sulfate attack based on harris hawks optimizing genetic programming
Xie Yuan1,2 Gao Wei1,2 Wang Yiwei1,2 Chen Xin1,2 Ge Shuangshuang1,2 Wang Sen1,2
1. College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China;
2. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
Abstract：In sulfate-aggressive environment, the reinforced concrete (RC) of underground structure is easily corroded by sulfate ion, thus the service life of the structure will be seriously affected. In order to predict the service life of RC underground structure in sulfate-aggressive environment, a new predicting method based on Harris hawks optimizing genetic programming (HHO-GP) is proposed, in which a new global optimization algorithm called Harris hawks optimization is adopted to optimize the main initial parameters of genetic programming. Firstly, based on the collected 25 groups of engineering data, the life prediction model of RC underground structure in sulfate-aggressive environment considering the influence of multiple factors is established. The calculation results by the proposed model show that the average relative training error (5.5%) and average relative predicting error (6.3%) of the model are acceptable. Secondly, the influence of the main initial parameters of the life prediction model on the accuracy and efficiency of the model is analyzed. The results show that, considering the accuracy and efficiency of the algorithm and model completeness, the small population number and maximum iterations of HHO is determined as 15, which can meet the requirements. The population size and maximum iterations of GP have little influence on the prediction accuracy, and their values can be recommended as 50.
谢渊 高玮 汪义伟 陈新 葛双双 王森. 基于哈里斯鹰优化遗传规划的钢筋混凝土地下结构硫酸盐腐蚀寿命预测[J]. 土木工程学报, 2022, 55(4): 33-41.
Xie Yuan Gao Wei Wang Yiwei Chen Xin Ge Shuangshuang Wang Sen. Life prediction of RC underground structure by sulfate attack based on harris hawks optimizing genetic programming. 土木工程学报, 2022, 55(4): 33-41.
