Newmark-Hall Earthquake Response Spectrum Calculator
Structural earthquake engineering: Construct the tripartite Newmark-Hall elastic design response spectrum, calculating spectral pseudo-acceleration ($S_a$), pseudo-velocity ($S_v$), and relative displacement ($S_d$) at structural period ($T$).
Peak Ground Motion Kinematics
Standard civil structure = 5%
Structure Natural Period
Tall building ~0.1s/story; Short masonry ~0.1β0.3s
Elastic Spectral Response at T
Pseudo-Acceleration S_a:
--
g (design base shear coefficient)
Relative Displacement S_d:
--
centimeters (drift demand)
Pseudo-Velocity:
--
cm / s (S_v)
Amp Factor:
--
S_a / PGA ratio
Base Shear / W:
--
V / Weight
Spectral Region Control
Governing Spectral Domain:
--
Corner Periods ($T_a, T_b, T_c, T_d$):
--
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