【作者】 张腾； 许成顺； 杜修力；

【Author】 ZHANG Teng;XU Chengshun;DU Xiuli;The Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education, Beijing University of Technology;

【机构】 北京工业大学城市与工程安全减灾教育部重点实验室；

【摘要】 对于地铁车站结构,高轴压下承压柱水平变形能力不足是发生破坏的关键因素。然而大多研究工作仅为针对地铁中柱轴心受压下的抗震研究,对于实际地下结构工程减震设计的指导作用不足。通过对偏心受压中柱的分析,研究偏心受压地下结构在地震作用下所能抗震反应性能,为实际工程设计提供参考。基于ABAQUS有限元平台,采用拟静力推覆分析方法,从构件层次系统地研究地铁中柱偏心受压下变形能力的影响规律,建立土–结构有限元分析模型,通过动力时程分析方法,对比研究了多层多跨地下车站结构在相同地震动作用下,相反偏心受压方向中柱偏心受压的抗震效果。研究结果表明,地铁中柱在偏心受压下变形能力发生变化,与偏心方向相同方向变形能力增强。地铁车站中柱在竖向地震动与横向地震动共同作用下发生破坏,破坏时地震动方向与偏心方向相同。更多还原

【Abstract】 For subway station structures, insufficient horizontal deformation capacity of bearing columns under high axial pressure is a key factor in the occurrence of failure. However, most of the research work is only focused on seismic research under axial compression of subway columns, which lacks guidance for the seismic design of actual underground structural engineering. By analyzing the eccentrically compressed columns, the seismic response performance of eccentrically compressed underground structures under earthquake action is studied, providing reference for practical engineering design. Based on the ABAQUS finite element platform, a quasi-static pushover analysis method is used to systematically study the influence of eccentric compression on the deformation capacity of subway columns at the component level. A soil structure finite element analysis model is established. Through dynamic time history analysis method, the seismic performance of multi story and multi span underground station structures under the same seismic motion and eccentric compression in the opposite direction of eccentric compression is compared and studied. The research results indicate that the deformation capacity of subway columns under eccentric compression changes, and the deformation capacity in the same direction as the eccentric direction increases. The central column of a subway station undergoes damage under the combined action of vertical and horizontal seismic motions, and the direction of the seismic motion during the damage is the same as the eccentric direction.更多还原