Aiming at the structural performance and multi-objective optimization problems of modern Huizhou style buildings, this paper proposes a set of overall structural performance modeling and intelligent optimization design methods based on BIM platform. Firstly, the refined BIM model is constructed by Revit, and combined with Navisworks collision detection to solve the design conflicts and improve the design accuracy. Relying on the BIM model to carry out structural performance analysis, the project duration was shortened by 15% after optimization. Secondly, a mathematical model was established with the maximum inter-story displacement angle and the equivalent gross weight of the structure as the dual objectives, and the national norms (shear-to-weight ratio, stiffness-to-weight ratio, axial compression ratio) as the constraints, and the design variables covered the stiffness and position of the extension arm/ring truss, and the column cross-section dimensions. In view of the complexity of the model, the GA-RBF coupling algorithm (dynamic synergy between NSGA-II and RBF neural network) is innovatively adopted, and the RBF proxy model is utilized to replace the time-consuming simulation. Taking the Anhui Hui building as a case study, under the excitation of 270° transverse wind direction, the GA-RBF algorithm reduces the displacement of the top floor from [-0.15, 0.15] m to [-0.06, 0.06] m (vibration damping of 60-70%), and the acceleration from [-0.04, 0.04] m/s² to [-0.01, 0.01] m/s² (vibration damping of >25%), which is significantly better than the traditional FM formulation. Based on multi-objective hybrid swarm optimization, the decentralized control strategy reduces the total mean square error (J₂) of the control force by more than 80% compared to the centralized control, which has J₂ = 1096.14 kN, and the actuator configuration is flexible and the parameters are adaptive (α- value spanning 11.923-13.482). The method of this paper deeply integrates BIM accurate modeling, multi-objective optimization theory and intelligent algorithm, which can take into account the structural safety, economy and construction efficiency, and provide technical support for the modernization of Huizhou-style buildings.
