Estimation of Equivalent Viscous Damping Ratio for Prestressed Reinforced Concrete Beam in Cruciform Beam-Column Subassemblages

Abstract

An available expression to estimate an equivalent viscous damping ratio for a flexural beam within prestressed reinforced concrete (called as PRC) interior beam-column subassemblages is proposed empirically through regression analyses using previous test results for cruciform beam-column subassemblage specimens. Energy dissipating ability in a PRC flexural beam is dominated by a contribution ratio of a tensile force in a PC tendon to an ultimate flexural moment of a beam critical section, and both bond situation