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This thesis investigates the acceleration amplification experienced by solar towers mounted on the rooftops of low-rise industrial buildings during a seismic event. Specifically, this thesis looks to assess the validity of using amplification factors adopted by the ASCE 7-05Minimum Design Loads for Buildings and Other Structures to approximate seismic acceleration amplification for roof-mounted solar towers. To investigate the validity of the ASCE 7-05 amplification factors, this thesis conducts time-history analyses of three theoretical solar towers mounted on the roof of a case study building. The time history analyses are conducted in the finite element computer modeling program SAP 2000 using 30 historical ground motion records of varying frequency content. Based on the results of the time history analyses, modifications to the ASCE 7-05 provision specific to roof-mounted solar towers are proposed. ix NOMENCLATURE A = alternate component amplification factor proposed by Assi a p = component amplification factor from the ASCE 7-05 A r = roof amplification factor A t = tower amplification factor a(t) = acceleration of the structure with respect to time A z = rooftop solar tower amplification factor C n = viscous damping matrix d(t) = displacement of the structure with respect to time F p = design seismic base shear F tb = tower base shear h n = average height of the primary structure with respect to the base I p = importance factor of the component K n = stiffness matrix M n = mass matrix n = degrees of freedom of the structure PRA = peak roof acceleration PGA = peak ground acceleration p(t) = applied load R p = response modification factor of the component S DS = spectral acceleration at a short period T = fundamental building period T a = approximate fundamental period T c = fundamental period of the component T building = fundamental period of the building T ratio = period ratio T tower = fundamental period of the tower v(t) = velocity of the structure with respect to time x = building period coefficients W p = weight of the component W t = weight of the tower (lbs.) x z = height in the primary structure of the point of attachment of the component with respect to the base μ = average σ = standard deviation 1.0 INTRODUCTION This thesis investigates the seismic amplification effects experienced by a solar tower mounted on the rooftop of …

Approximating the Seismic Amplification Effects Experienced by Solar Towers Mounted on the Rooftops of Low-Rise Industrial Buildings