English：

The structural model modification for complex and high-dimensional structures often faces thechallenges of high solution difficulty and large amount of calculation, to solve this problem, a modelmodification method based on the combination of Kriging and NSGA2 algorithm is proposed for largeconcrete W-shaped column structures. Firstly, the W-shaped column is divided into five segments forsimulation, and the finite element model of the W-shaped column is established by MIDAS FEA NXsoftware, the elastic modulus, bulk density, cross-sectional area i, j of the five segments are selected, asthe model modification parameters, and the Latin hypercube sampling （LHS） method is used to generatethe combination of model modification parameters, and the settlement of the north and south sides of theW-shaped column under different parameter combinations is calculated. Taking the combination of modelparameters as the input and the settlement of the north and south sides as the output, a Kriging finiteelement surrogate model is established. At the same time, the objective function is established by minimizing the error between the measured settlement of the north and south sides of the W-shapedcolumn, the finite element calculation results, and the NSGA2 multi-objective optimization algorithm isused for parameter optimization, finally, the modified parameters of the W-shaped column model areupdated. Through verification, the settlements of the north and south sides of the modified W-shapedcolumn are 203.0745, 203.0748mm, respectively,which are close to the actual measured results of217,218mm,which proves the practicability.