## 6 Seismic Response Spectra Criteria between Codes  
The previous sections described the seismic response spectra according to MDOC Sismo CFE 2015, ASCE/SEI 7-16, and IBC 2018, showing the procedure used according to the importance of the structure. Since each code has differences in the seismic inputs and soil factors, Tables 9 and 10 show an overview of the criteria used for each code to obtain the response spectra. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Spectrum** & **Inputs or Factors** & \begin{tabular}{c} **MDOC Sismo CFE** \\ **2015** \\ \end{tabular} & **ASCE-SEI 7/16** & **IBC 2018** \\ \hline \multirow{6}{*}{\begin{tabular}{c} Constant \\ acceleration spectrum \\ \end{tabular} } & Seismic hazard maps & PRODISIS & USGS website & \begin{tabular}{c} Seismic hazard maps of \\ each country or region \\ \end{tabular} \\  & Spectral inputs from & \(a_{0r}\) & \(S_{S}\) & \(S_{S}\) \\  & seismic hazard maps & & & \\ Soil factors & \(F_{sit}\), \(F_{res}\) & \(F_{a}\) & \(F_{a}\) \\  & Software aids & PRODISIS & ASCE-SEI 7/16 website & \begin{tabular}{c} Depends on each \\ country or region \\ \end{tabular} \\ \hline \multirow{6}{*}{\begin{tabular}{c} Regional \\ spectrum \\ \end{tabular} } & Seismic hazard maps & PRODISIS & USGS website & \begin{tabular}{c} Seismic hazard maps of \\ the country or region \\ \end{tabular} \\  & Spectral inputs from & \(a_{0r}\) & \(S_{S}\), \(S_{1}\) & \(S_{S}\), \(S_{1}\) \\  & seismic hazard maps & \(T_{s_{s}}\), \(H_{s}\), \(v_{s}\) & \(\overline{v}_{s}\), \(\overline{N}\), \(\overline{s}_{u}\) & \(\overline{v}_{s}\), \(\overline{N}\), \(\overline{s}_{u}\) \\  & Soil factors & \(F_{sit}\), \(F_{res}\) & \(F_{a}\), \(F_{v}\) & \(F_{a}\), \(F_{v}\) \\  & Software aids & PRODISIS & ASCE-SEI 7/16 website & \begin{tabular}{c} Depends on the \\ country or region \\ \end{tabular} \\ \hline \multirow{6}{*}{\begin{tabular}{c} Silemic hazard \\ maps source \\ \end{tabular} } & Seismic hazard maps of & PRODISIS & USGS website, PEER & \begin{tabular}{c} Seismic hazard maps of \\ the country or region \\ \end{tabular} \\  & Spectral inputs from & Spectral acceleration of & Spectral acceleration in & \begin{tabular}{c} Special acceleration in \\ rock layer, using site \\ class B \\ \end{tabular} & \begin{tabular}{c} rock layer, using site \\ class B \\ \end{tabular} \\  & \begin{tabular}{c} Minimum of five \\ synthetic \\ accelerators or five \\ real earthquakes \\ \end{tabular} & \begin{tabular}{c} Minimum of five \\ synthetic \\ accelerators or five \\ real earthquakes \\ \end{tabular} & \
\begin{tabular}{c} Minimum of five \\ synthetic \\ accelerators or five \\ real earthquakes \\ \end{tabular} \\  & Soil inputs for site class & Layered soil with & Layered soil with \\ dynamic properties & dynamic properties & dynamic properties \\  & 1D model: Soil transfer & 1D Model: soil transfer \\ Soil factors & function \(F(\omega)\) & function \(F(\omega)\) \\  & 3D FEM model: & \\  & Related to structures of &
\begin{tabular}{c} group A+ \\ PRODISIS, DeepSoil, \\ ProShake \\ \end{tabular} & DeepSoil, ProShake & DeepSoil, ProShake \\ \hline \hline \end{tabular}
\end{table} 
Table 9: Seismic response spectra criteria and comparison between codes. According to Table 9, the spectrum criteria used on each seismic code is presented, showing the minimum values required. The constant acceleration and regional spectrum criteria use a few seismic inputs, where the spectral acceleration in the rock layer does not require the entire graph of \(T\) vs. \(S_{a}\) and the site class use provides factors according to the soil type. Each seismic code has different inputs and factors we can use to assess the spectrum criteria.