| Title |
An Analytical Study for Structural Behaviors of Unbonded Precast Rectangular Hollow Section Concrete Piers |
| Keywords |
precast piers;OpenSEES;gap opening;jacking force ratio;ratio of tendon;size of segment;프리캐스트 교각;갭오프닝;긴장비;긴장재 비;세그먼트 크기 |
| Abstract |
Unbonded precast concrete piers have better seismic performances than conventional reinforced concrete piers. In this research, seismic performances of unbonded precast prestressed concrete piers are analyzed using OpenSEES. Main parameters of analysis are concrete strength, jacking force ratio, ratio of tendon, and size of precast segment. In results, as the ratio of tendon and jacking force ratio increase, the flexural strength increases at softening state and ultimate state. Concrete strength and size of precast segment are negligible. But initial jacking force ratio leads to early yielding of prestressing tendon. Since compressive strain in core concrete is much less than ultimate strain, it can be expected that the amount of transverse steel reinforcement is to be reduced in comparison with conventional reinforced concrete column. |