| Tip |
|---|
Using the coefficients obtained from the map, the spectrum curve given in Figure 11.4-1 with Equation 11.4-5 - 11.4-7 Codes is automatically determined by the programme. |
| Info |
|---|
Due to the need for site-specific analysis for site class F, the design spectrum isn’t determined automatically. The reduced design spectrum needs to be imported as a .txt file. |
...
İnternational Design Codes
ASCE 7-16 : 11.4.6 Horizontal Elastic Design Spectrum
TSC 2018 : Design Spectrum Reduced by Respose Modification (4.4.1)
...
SYMBOLS
Fa = Short-Period Site Coefficient
Fv = Long-Period Site Coefficient for a period of 1.0 seconds
SMS = Short-period design spectral response acceleration parameter [dimensionless]
SM1 = Design spectral response acceleration parameter for a period of 1.0 seconds [dimensionless]
SS = the mapped MCER spectral response acceleration parameter at short periods as determined in accordance with Section 11.4.2,
S1 = the mapped MCER spectral response acceleration parameter at a period of 1 s as determined in accordance with Section 11.4.2
SD1 = Design spectral response acceleration parameter for a period of 1.0 seconds
SDS = Design earthquake spectral response acceleration parameters at short periods
T = Natural vibration period [s]
T0 =Horizontal elastic design acceleration spectrum corner period [s]
TS = Horizontal elastic design acceleration spectrum corner period [s]
TL = Transition period to constant displacement region in horizontal elastic design spectrum [s]
Sa = Horizontal elastic design spectral acceleration [ g]
...
Horizontal elastic design spectral accelerations Sa, are defined in terms of gravity [g] depending on the natural vibration period.With the spectral response acceleration parameters obtained from USGS depending on the coordinates, horizontal elastic design spectrum Sa isdetermined according to the formula below. It is represented by a total of 4 functions, different in each region. It’s shown in the graph below.
...