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•ÅF 1455-1460•Å
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ŒfÚŽGŽi‰pjF THE EARTHQUAKE ENGINEERING SYMPOSIUM PROCEEDINGS
’˜ŽÒi‰pjF Hirokazu Iemura, Yoshikazu Takahashi, Naoki Sogabe, Masahiro Ukai
ƒ^ƒCƒgƒ‹i‰pjF Fundamental Characteristics of Unbonded Bar Reinforced Concrete Structure
´˜^i‰pjF New type of RC pier with additional unbonded high-strength bars is proposed. The advantage of installing highstrength bars into RC pier is explained and the new concept of inelastic design of RC structure is proposed. To clarify the fundamental characteristics, four types of models are tested under cyclic lateral loading. As the result, the proposed structures are found to have the positive stiffness even after yielding. Compared with the conventional RC structure, the residual displacement of the proposed structures after strong earthqukes would be small, although the hysteretic dissipated energy is almost same. These results suggest that the proposed structure has a better performance under strong earthquakes.
ƒL[ƒ[ƒhi‰pjF High aseismic performance, RC structure, Unbonded bars, Residual displacement, Post-yield stiffness
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