基于GA-SVR的建筑物液化震陷预测方法

根据影响建筑物液化震陷量的9个主要因素,建立了基于遗传算法和回归型支持向量机(support vector regression,SVR)的建筑物液化震陷量预测模型.该模型通过有限的60组实例数据学习,利用遗传算法自动确定ν-SVR的最优模型参数,建立了建筑物液化震陷量与其各种影响因素之间的非线性关系.运用所建立的模型对另外10个实例进行推广预测,取得了较好的效果,与实际液化震陷量的平均相对误差在5%左右,显示了该方法的有效性和可行性.同时,本文的思路和方法也可推广至建筑结构的震害预测.

Method for Building Settlements Prediction Due to Earthquake Liquefaction Based on GA-SVR

According to the nine main factors,which affect building settlements due to earthquake liquefaction,a method is proposed to predict building settlements due to earthquake liquefaction based on support vector regression(ν-SVR)and genetic algorithm(GA).Since the modeling of this method uses the genetic algorithm to automatically determine the optimal parameters of ν-SVR,and it is directly based on 60 real measured seismic settlement samples,the nonlinear relation between building settlements and the various factors is established.The other 10 examples are predicated by the training model to achieve good results with the average relative error of around 5% compared with the actual building settlements.The effectiveness and feasibility have been proven.The analytic method and process discussed in this paper can also be applied to the seismic damage prediction of other structures of different forms.