Seismic Response of Partially Prestressed Concrete

Idealizations for the cyclic moment-curvature behavior of prestressed, partially prestressed, and reinforced concrete members are presented. These idealizations are used in a comparative study of the earthquake response of partially prestressed concrete single degree of freedom systems, ranging from fully prestressed to reinforced, to different earthquake acceleration records. Maximum displacement ductility factors are tabulated for varying values of system strength, initial period of vibration and viscous damping ratio, and for different earthquake excitations. In general, it is found that for very severe earthquake shaking the displacement response is greater for a prestressed concrete system than for a reinforced concrete system with the same strength, initial stiffness, and equivalent viscous damping.