CAJ | 학술논문

为了研究纵筋采用500 MPa级细晶粒钢筋的高速铁路圆端形桥墩的抗震性能，对4个配置HRBF500钢筋和1个配置HRB335钢筋的圆端形桥墩试件进行了拟静力试验。试验参数主要包括纵筋强度、轴压比、配筋率和箍筋加密区的拉筋数量。试验结果表明：配置HRBF500钢筋的圆端形桥墩抗震性能变化规律与配置HRB335钢筋的圆端形桥墩基本相同；配置HRBF500钢筋可以显著减少桥墩纵向钢筋的用量，提高桥墩的承载力并具有良好的抗震延性；增加轴压比或提高配筋率均可提高桥墩的承载力，但同时也会减小其变形能力；在墩底箍筋加密区增加拉筋的数量可明显提高桥墩的延性。研究表明，配置HRBF500钢筋的圆端形桥墩具有良好的抗震性能，可在高速铁路工程中安全应用。
위료연구종근채용500 MPa급세정립강근적고속철로원단형교돈적항진성능，대4개배치HRBF500강근화1개배치HRB335강근적원단형교돈시건진행료의정력시험。시험삼수주요포괄종근강도、축압비、배근솔화고근가밀구적랍근수량。시험결과표명：배치HRBF500강근적원단형교돈항진성능변화규률여배치HRB335강근적원단형교돈기본상동；배치HRBF500강근가이현저감소교돈종향강근적용량，제고교돈적승재력병구유량호적항진연성；증가축압비혹제고배근솔균가제고교돈적승재력，단동시야회감소기변형능력；재돈저고근가밀구증가랍근적수량가명현제고교돈적연성。연구표명，배치HRBF500강근적원단형교돈구유량호적항진성능，가재고속철로공정중안전응용。
To study the seismic behavior of round-ended high-speed railway bridge piers reinforced with 500 MPa fine grained rebar, four HRBF500 rebar reinforced pier specimens and one HRB335 rebar reinforced pier specimen were tested under low-cycle reversed loading.The test parameters mainly include longitudinal reinforcement strength, axial compression ratio, reinforcement ratio and the number of tie bars in the dense stirrup region.The test results show that the change rule of seis-mic performance of the HRBF500 rebar reinforced pier is much the same as that of the HRB335 rebar reinforced pier.Using HRBF500 rebar can significantly reduce the number of longitudinal reinforce-ments, and improve the bearing capacity of the pier with good seismic ductility.Increasing the axial compression ratio or the reinforcement ratio can improve the bearing capacity of the pier while re-duces its deformation capability.Increasing the number of tie bars within the dense stirrup region can significantly improve the ductility of the pier.The study shows that HRBF500 rebar reinforced round-ended piers have excellent seismic performance, and they can be safely applied to the high-speed railway engineering.