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王国波, 郝朋飞, 孙富学. 地铁车站结构端部效应影响范围研究[J]. 岩土工程学报, 2020, 42(8): 1435-1445. DOI: 10.11779/CJGE202008008
引用本文: 王国波, 郝朋飞, 孙富学. 地铁车站结构端部效应影响范围研究[J]. 岩土工程学报, 2020, 42(8): 1435-1445. DOI: 10.11779/CJGE202008008
WANG Guo-bo, HAO Peng-fei, SUN Fu-xue. Spatial influence scope of end wall of metro station structures[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(8): 1435-1445. DOI: 10.11779/CJGE202008008
Citation: WANG Guo-bo, HAO Peng-fei, SUN Fu-xue. Spatial influence scope of end wall of metro station structures[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(8): 1435-1445. DOI: 10.11779/CJGE202008008

地铁车站结构端部效应影响范围研究

Spatial influence scope of end wall of metro station structures

  • 摘要: 常规的地铁车站抗震设计均是选择跨中截面按平面问题进行计算分析和设计,但在靠近车站前后端墙的区域必然受端墙及区间隧道的影响,从而应考虑其空间效应,即端墙的端部效应。基于对地铁车站及区间隧道振动台试验的数值模拟,验证数值模型的合理性,然后对地铁车站结构端部空间影响范围进行一系列的数值分析,主要考虑地铁车站结构跨数及层数、土体参数、地震波类型及幅值以及区间隧道数量的影响。计算分析结果表明:车站结构的跨数、层数以及区间隧道的数量均会对地铁车站端部影响范围产生一定的影响,车站结构端部影响范围最大的为2层3跨车站,其影响范围为1.6BB为结构宽度);地铁车站结构端部效应影响范围与其自身结构特性相关,而受土体参数和地震波类型及幅值影响较小,同时对比分析表明采用柱端弯矩作为端部影响范围的评价指标更为合理。

     

    Abstract: The conventional seismic design of metro stations is to select the mid-span section for calculation analysis and design based on plane problem. However, the spatial effect of end walls must be considered because the area close to the front and rear end walls will inevitably be affected by the end walls and running tunnels. This effect is also called the end wall effect. The rationality of the numerical model is verified based on the numerical simulation of shaking table tests on metro stations and running tunnels firstly. Then a series of parameter analysis is performed on the spatial influence scope of the end wall of the metro station structures, which mainly includes the influences of the number of spans and layers of the metro station structures, soil parameters, seismic wave types and amplitudes, and the number of running tunnels. The calculation and analysis results show that the number of spans, the number of layers and the number of tunnels of the station structures will have certain effect on end walls influence scope. The largest influence area of end wall is the station with 2 layers and 3 spans, and the influence range is 1.6B (B is the structure width). The influence range of end wall effect is related to their own structural characteristics, but they are less affected by the soil parameters and seismic wave types and amplitudes. At the same time, the comparative analysis shows that it is more reasonable to use column end bending moment as evaluation indexes for end wall influence range analysis.

     

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