Abstract:
Low-cycle reversed lateral loading experiments were conducted on three full scale specimens, including one reference cast-in-place specimen with axial compression ratio of 0.20 and two new hybrid precast specimens with axial compression ratios of 0.10 and 0.20. In contrast with the cast-in-place specimen, it was found that the new hybrid precast specimens under the same axial loading possessed enhanced crack resistance, strength, lateral stiffness, similar displacement ductility and slightly decreased energy-dissipating capacity. By comparison of the two new hybrid precast specimens with different axial compression ratios, it was shown that as the axial loading was increased, the lateral stiffness was significantly reduced, the residual displacement was increased, and the energy-dissipating capacity was enhanced. The new hybrid precast specimen with lower axial compression ratio performed even poorer in all aspects except for strength than the cast-in-place specimen under higher axial compression ratios.