CAJ | 학술논문

我国高速铁路桥梁广泛采用混凝土重力式桥墩及钻孔灌注桩基础。针对高速铁路桥梁的主要结构特征，介绍了其地震反应特点。由于高速铁路桥梁墩身横桥向刚度及截面抗力较大，导致桩基础承受的地震作用也较大，使桩基础基于强度控制的能力保护设计难于实现。通过对比AASHTO(LRFD)，Eurocode 8、新西兰桥梁抗震规范及日本铁道构筑物抗震设计规范对桩基础抗震性能的要求，提出了高速铁路桥梁桩基础由能力保护设计向基于性能的抗震设计思想转化的必要性。建议应根据桥梁的重要性，对桩基础采用多级抗震设防思想，合理地利用地基土的塑性耗能作用，以减少桥墩的水平地震作用。介绍了强震下桩基础的非线性静力计算模型的最新研究进展，总结了地基土非线性的合理模拟方法。
아국고속철로교량엄범채용혼응토중력식교돈급찬공관주장기출。침대고속철로교량적주요결구특정，개소료기지진반응특점。유우고속철로교량돈신횡교향강도급절면항력교대，도치장기출승수적지진작용야교대，사장기출기우강도공제적능력보호설계난우실현。통과대비AASHTO(LRFD)，Eurocode 8、신서란교량항진규범급일본철도구축물항진설계규범대장기출항진성능적요구，제출료고속철로교량장기출유능력보호설계향기우성능적항진설계사상전화적필요성。건의응근거교량적중요성，대장기출채용다급항진설방사상，합리지이용지기토적소성모능작용，이감소교돈적수평지진작용。개소료강진하장기출적비선성정력계산모형적최신연구진전，총결료지기토비선성적합리모의방법。
Concrete gravity pier withbored pile foundation are widely used in high speed railway bridge in China. According to the main structural characteristics of high speed railway bridge,the characteristics of seismic response were introduced. Due to the larger transverse rigidity of pier shafts and larger cross-section resistance, seismic action of high speed railway bridge pile foundation is also bigger,so it is difficult to achieve capacity design based on intensity control. By comparing the different requirements of seismic performance for pile foundation from AASHTO(LRFD),Eurocode 8,bridge manual of transit New Zealand and seismic design standards and explanations for railway structures of Japan,it is necessary that the pile foundation of high speed railway bridge should transform from capacity design to performance-based seismic design. The ideal of multiple seismic fortifications should be adopted for pile foundation according to the importance of bridges,and plastic energy dissipation of foundation soil should be reasonably used in order to reduce horizontal earthquake action of bridge piers. The latest research progress of the nonlinear static calculation model of pile foundation under strong earthquake was introduced,and reasonable simulation method for the nonlinearity of foundation soil was summarized.