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Symbols
D | Strength Excess Coefficient |
D alt | Strength Excess Coefficient applied to the lower part of the building |
D üsy | Strength Excess Coefficient applied to the lower part of the building |
R | Carrier System Behavior Coefficient |
R alt | Structural System Behavior Coefficient applied to the lower part of the building |
(R a ) alt | Earthquake Load Reduction Coefficient applied to the lower part of the building |
(R a ) n, alt | Earthquake Load Reduction Coefficient applied to the lower part of the building in nth vibration mode |
R üst | Structural System Behavior Coefficient applied to the lower part of the building |
( R a ) üst | Earthquake Load Reduction Coefficient applied to the upper part of the building |
(R a ) n, üst | Earthquake Load Reduction Coefficient applied to the upper part of the building in the nth vibration mode |
T | Natural vibration period |
Tn | Natural vibration period of the nth mode |
Tp(X) | (X) the dominant natural vibration period of the building in the direction of the earthquake |
νn(X) | The coefficient used in the calculation of the equivalent earthquake load reduction coefficient applied in the nth mode for the lower part of the building |
ν alt (X) | Coefficient used to calculate the reduced internal forces caused by the vibration of the lower part of the building itself |
ν n, alt(X) | Coefficient used to calculate the reduced internal forces from the vibration of the lower part of the building itself in the nth mode |
νüst(X) | Coefficient used to calculate the internal forces transferred from the upper to the lower part of the building |
ν n, üst(X) | Coefficient used to calculate the internal forces transferred from the upper to the lower part of the building in the nth mode |
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In buildings with basements where different R and D coefficients are used in the upper and lower sections, the earthquake calculation is made by considering the Modal Calculation Methods as mentioned in 4.3.6.2 . For each nth vibration mode and taking the relevant natural vibration period T n into consideration , the procedures in Equation (4.4) , Equation (4.5) and Equation (4.6) are applied.
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The "Calculation method with single loading status" option is selected from the "Analysis Settings" command as shown in the picture below.
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Modal Response Spectrum Analysis of Structures with Basement Buildings with Modal Analysis Located under the heading.
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