# Vertical Earthquake Effects

**Symbols**

* S _{DS} =* Short period design spectral acceleration coefficient [dimensionless]

*(Z) direction earthquake effect under the effect of the design underlying earthquake*

**E**_{d }^{(Z)}_{ }=*Constant load effect*

**G =****4.4.3. Vertical Earthquake Impact**

**4.4.3.1 -** Vertical earthquake calculation in buildings classified as DTS = 1, DTS = 1a, DTS = 2 and DTS = 2a and containing the following elements, based on the *local vertical vibration modes of these elements, only the vertical elasticity* defined in **2.3.5 ***for these elements According to the acceleration spectrum* , it will be done with the method given in **4.8.2** . In this calculation of the *vertical earthquake effect E *_{d }^{(Z)} , *R* / *I* = 1 and *D* = 1 for all structural systems .

**(a) **Buildings containing beams whose openings have a horizontal projection of 20 m or more,

**(b) **Buildings containing consoles whose openings have a horizontal projection of 5 m or more,

**(c)** Buildings containing columns resting on beams,

**(d)** Buildings whose columns are inclined relative to the vertical.

**The ***vertical earthquake effect E *_{d }^{(Z) }in the structural system parts other than the elements specified in **4.4.3.2 - 4.4.3.1** and in buildings other than the definition in **4.4.3.1 will** be calculated approximately with **Equation (4.10)** without making a special calculation.

Here, *G shows the* constant load effect and *S *_{DS shows} the *short-period design spectral acceleration coefficient* defined in **2.3.2** .