Optimization of a Seismically Isolated Structure Using Genetic Algorithms (original) (raw)

In this paper, the dynamic response of an isolated structure supported by lead rubber bearings is studied. The isolated building is modeled using finite element software. Each bearing is modeled using its yield force, elastic stiffness and plastic stiffness. The main objective of the paper is to find the optimal parameters of the base isolation system using genetic algorithms in order to minimize the displacement of the building. In order to minimize the objective function an elitist non-dominated sorting genetic algorithm is employed. The study focuses on a 10 story concrete structure rehabilitated according to new design prescriptions. The optimal distribution is determined using nonlinear time history analysis and three earthquakes pertinent to the Vrancea source.

Optimization of an Inter-storey Isolated Structure Using Genetic Algorithms

The paper studies the influence of an optimal inter-storey isolation system on seismic behaviour of a concrete structure. The inter-storey isolation system uses lead rubber bearings at a certain level of the structure. The structure will be subjected to a series of pulse like earthquakes in order to account for the variability of the hazard of the Vrancea source. The article will study a concrete structure which will be modelled using finite element software. The parameters and location of the story isolation system will be studied and optimized using genetic algorithms. The optimization will be applied in order to minimise displacements. The parameters which will be optimized will be the story where isolation system is equipped and its dimensions.

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