4. Summary of results

The direct response module at the top of the excited building and the coupled response module at the top of the adjacent building are tested for various modules of the intermediate link foundation. They are compared to the values obtained with the extreme conditions of connection between the 2 buildings: completely decoupled or completely rigid foundations. It is shown in the figures below that by dividing or multiplying by 1000 the constituent module of the structures to assign it to the intermediate link foundation with the flexible foundation hypothesis, we obtain the 2 limit cases of connection between the 2 buildings (rigid foundation hypothesis).

Figure 4-a: Comparison of the modules of direct and coupled responses to harmonic excitation between rigid and soft cases with an increase in the modulus of the link foundation in the direction \(X\) .

Figure 5-b: Comparison of the modules of direct and coupled responses to harmonic excitation between rigid and soft cases with an increase in the modulus of the link foundation in the direction \(Y\) .

Figure 5-c: Comparison of the modules of direct and coupled responses to harmonic excitation between decoupled rigid cases and soft cases with a decrease in the modulus of the link foundation in the direction \(X\) .

Figure 5-d: Comparison of the modules of direct and coupled responses to harmonic excitation between decoupled rigid cases and soft cases with a decrease in the modulus of the link foundation in the direction \(Y\) * . *