基于免疫算法的单桩极限承载力预测

Prediction of Ultimate Bearing Capacity of Pile Based on Immune Algorithm

基于生物免疫系统的免疫算法是一种解决工程中复杂非线性问题的十分有效的方法.对免疫算法作了简要分析和评论.单桩极限承载力受众多因素的影响,Q-s曲线表现出复杂的非线性特征.结合武汉地区预应力混凝土管桩静载荷试验资料,运用M ATLAB编写了免疫算法程序对预应力混凝土管桩的极限承载力进行了预测分析.计算结果与试验资料基本一致.由于免疫算法比传统算法在全局优化、非线性优化、多参数优化等方面具有一定的优势,因而可望在岩土工程中得到广泛的应用.

Immune algorithm based on creature＇s immune system is an effective method to solve the complicated nonlinear problems in engineering. Some classical researches on immune algorithm are introduced and reviewed. The Q-s curve of single pile has complicated nonlinear features because the ultimate bearing capacity of single pile is affected by many factors. Based on the results of static load test of prestressed concrete pipe piles in Wuhan city, immune algorithm program is developed by MATLAB to predict the ultimate bearing capacity of prestressed concrete pipe piles. Calculation results are consistent with those from tests. It indicates that the immune algorithm has much more superiority than traditional algorithm in global optimization, nonlinear optimization and multiparameter optimization. It will be widely applied in geotechnical engineering.