Response Spectrum 2
Response Spectrum 2 : A curve showing the computed maximum response of a set of simple damped harmonic oscillators of different natural frequency to a particular record of ground acceleration. Response spectra, commonly plotted on tripartite logarithmic graph paper, show the oscillator's maximum acceleration, velocity, and displacement as a function of oscillator frequency for various levels of oscillator's damping. A computational approximation to the response spectrum is referred to as the pseudo-relative velocity response spectrum (PSRV). These curves are used by engineers to estimate the maximum response of simple structures to complex ground motions. for example, the 5-percent spectral acceleration at 1 second is the maximum acceleration of the top of a structure with 5 percent damping whose natural period of vibration is 1 second when subjected to a given input ground-acceleration record
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