Multi-objective optimization and seismic response analysis of concrete interlayer seismic isolation technology in prefabricated building

With the continuous optimization of prefabricated concrete structures, they have been widely used in the field of construction. However, due to the existence of semi-rigid connections in prefabricated concrete structures, the seismic performance of the entire structure will be reduced. Therefore, how to improve the seismic performance of prefabricated concrete structures has become a current research hotspot. This study first combines interlayer isolation structures with prefabricated concrete to build a new type of semi-rigid connection prefabricated concrete interlayer isolation system. Then, to further optimize the seismic simulation performance of the system, a multi-objective optimization scheme of semi-rigid connection prefabricated concrete interlayer isolation structure is designed by combining the sequential quadratic programming algorithm and the interior point method. The research results indicate that the multi-objective optimization algorithm used has good optimization performance. The cost optimization accuracy under this algorithm can reach up to 0.98, and in addition, the displacement and acceleration objective function values under this algorithm can also be maintained at around 0.95. In summary, the multi-objective optimization algorithm proposed by this research institute has good optimization results, which can ensure that the building structure has good seismic performance while meeting the optimal cost, displacement, and acceleration objective function values.