# Assessing the Seismic Demands on Non-Structural Components Attached to Reinforced Concrete Frames
## 4 Selection and Scaling of Ground Motions  
In the seismic response assessment procedure, actual ground-motion records produce a realistic response [35; 36]. The PEER [37] NGA-West2 Database has such records readily available. Hence, in the present study, 11 horizontal actual ground motion excitations were considered as per ASCE 7-16 [38] for each soil type. According to the NEHRP [39] site classification system, ground motions are selected based on shear wave velocity (\(V_{S30}\)) to represent hard, medium, and soft soils. The details of the excitations with respect to hard (Soil A), medium (Soil B), and soft soil (Soil C) are shown in Tables 1-3, respectively. Ground motions consistent with the design spectrum are chosen in this study because they can significantly save computing work [40]. The time-domain spectral matching approach suggested by [41] is used to produce spectrum-compatible earthquake excitations. Figure 2: Generation of floor response spectrum. SeismoMatch [42], a computer software, was used to spectrally match the ground motions to the target spectrum. SeismoMatch is an application that uses the wavelet approach to change earthquake ground motions and build a response spectrum almost identical to the target spectrum in a period range of interest. In this procedure, carefully selected basic wavelets are added and removed from the original record so that no further displacement is imposed. The essential properties of the original record in terms of the amplitude and frequency content of the record over the time history duration are retained, and the generated design time histories have spectra that are identical to the design spectra. Figure 3 shows the IS 1893:2016 target spectra associated with 5% damping and mean spectra of ground excitations for three different soil types. The average spectrum cannot be less than 90% of the target spectrum for the full period range, as stated in ASCE 7-16. From \begin{table}
\begin{tabular}{c c c c c c} \hline
**Earthquake** & **Year** & **Station** & \(M_{w}\) & \(R_{hp}\) (km) & \(V_{s30}\) **(m/s)** \\ \hline Helena\_ Montana-01 & 1935 & Carroll College & 6 & 2.07 & 593.35 \\ Helena\_ Montana-02 & 1935 & Helena Fed Bldg & 6 & 2.09 & 551.82 \\ Kern County & 1952 & Pasadena, CIT Athenaeum & 7.36 & 122.65 & 415.13 \\ Kern County & 1952 & Santa Barbara Courthouse & 7.36 & 81.3 & 514.99 \\ Kern County & 1952 & Taft Lincoln School & 7.36 & 38.42 & 385.43 \\ Southern Calif & 1952 & San Luis Obispo & 6 & 73.35 & 493.5 \\ Parkfield & 1966 & Cholame, Shandon Array \#12 & 6.19 & 17.64 & 408.93 \\ Parkfield & 1966 & San Luis Obispo & 6.19 & 63.34 & 493.5 \\ Parkfield & 1966 & Temblor pre-1969 & 6.19 & 15.96 & 527.92 \\ Borrego Mtn & 1968 & Pasadena, CIT Athenaeum & 6.63 & 207.14 & 415.13 \\ Borrego Mtn & 1968 & San Onofre, So Cal Edison & 6.63 & 129.11 & 442.88 \\ \hline \end{tabular}
\end{table} 
Table 1: Details of ground motions consistent with hard soil. \begin{table}
\begin{tabular}{c c c c c} \hline
**Earthquake** & **Year** & **Station** & \(M_{w}\) & \(R_{hp}\) (km) & \(V_{s30}\) **(m/s)** \\ \hline Humbolt Bay & 1937 & Ferndale City Hall & 5.8 & 71.28 & 219.31 \\ Imperial Valley-01 & 1938 & El Centro Array \#9 & 5 & 32.44 & 213.44 \\ Northwest Calif-01 & 1938 & Ferndale City Hall & 5.5 & 52.73 & 219.31 \\ Imperial Valley-02 & 1940 & El Centro Array \#9 & 6.95 & 6.09 & 213.44 \\ Northwest Calif-02 & 1941 & Ferndale City Hall & 6.6 & 91.15 & 219.31 \\ Northern Calif-01 & 1941 & Ferndale City Hall & 6.4 & 44.52 & 219.31 \\ Borrego & 1942 & El Centro Array \#9 & 6.5 & 56.88 & 213.44 \\ Imperial Valley-03 & 1951 & El Centro Array \#9 & 5.6 & 24.58 & 213.44 \\ Northwest Calif-03 & 1951 & Ferndale City Hall & 5.8 & 53.73 & 219.31 \\ Kerr County & 1952 & LA, Hollywoodototot FF & 7.36 & 114.62 & 316.46 \\ Northern Calif-02 & 1952 & Ferndale City Hall & 5.2 & 42.69 & 219.31 \\ \hline \end{tabular}
\end{table} 
Table 2: Details of ground motions consistent with medium soil.