邻近地面建筑一体化地铁车站结构地震响应分析

    Seismic Response Analysis of Integrated Subway Station Structure Near Ground Building

    • 摘要: 为了研究邻近地面建筑一体化地铁车站结构地震响应特性,基于ABAQUS软件建立了地铁地下车站-土-邻近地面建筑一体化结构大型三维有限元数值模型,利用典型的近、远场地震动记录,计算分析了邻近地面建筑一体化地铁车站结构的地震响应规律及空间效应.结果表明,邻近地面建筑一体化结构兼备地铁地下车站结构和地上结构2种结构特性,原有单体结构的动力特性和反应发生了改变;邻近地面建筑一体化结构受地震波频谱特性的影响显著,其中,体系基频附近能量分布相对集中的地震波能够对一体化地铁车站结构的地震响应产生显著的影响;邻近地面建筑一体化地铁车站结构具有明显的空间效应,应该按照空间问题进行一体化地铁车站结构的抗震计算;受地面建筑的影响,一体化地铁车站中柱出现了扭矩,在进行一体化车站结构中柱抗震设计时,应考虑轴力、剪力、弯矩和扭矩的共同作用.研究成果对该类结构的抗震设计与分析具有一定的参考意义.

       

      Abstract: To study the seismic response characteristics of integrated subway station structures, based on the ABAQUS software, a large three-dimensional finite element numerical model of the integrated structure of underground station-soil-neighborly ground building was established. The seismic response law and spatial effect of the integrated subway station structure of adjacent ground buildings were calculated and analyzed by using the typical near and far field seismic records. Results show that the integrated structure of adjacent ground buildings has two structural characteristics, subway underground station structure and above ground structure, and the dynamic characteristics and reaction of the original single structure have changed. The seismic response of the integrated subway station structure is obviously affected by the seismic wave spectrum characteristics, among which the seismic wave with relatively concentrated energy distribution near the fundamental frequency of the system can have a significant impact on the seismic response of the integrated subway station structure; the integrated subway station structure with adjacent ground buildings has obvious spatial effect, therefore, the seismic calculation of the integrated subway station structure should be carried out according to the space problem. The seismic response of the integrated subway station structure is obviously smaller than that of the single station, and the near-field seismic wave can make great difference to the seismic response of the two structures. At the same time, due to the influence of the ground building, the torque of the column in the integrated subway station appears. The research results have certain reference significance for seismic design and analysis of this type of structure.

       

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