上盖地铁车站结构振动台试验对比研究

韩学川,陶连金,张宇,贾志波

振动与冲击 ›› 2021, Vol. 40 ›› Issue (24) : 65-74.

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (24) : 65-74.
论文

上盖地铁车站结构振动台试验对比研究

  • 韩学川,陶连金,张宇,贾志波
作者信息 +

A comparative study on the shaking table test of a superstructure subway station structure

  • HAN Xuechuan,TAO Lianjin,ZHANG Yu,JIA Zhibo
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摘要

为了研究上盖地铁车站结构的地震响应规律,以两种地铁上盖结构体系为研究对象,开展了粉细砂场地振动台试验研究,分别从加速度和应变两方面对地铁车站结构部分进行地震响应研究,并将两种试验结果进行对比,试验数据表明:(1)两种试验模型土监测点的加速度峰值随着输入地震强度的增加逐渐增大,而加速度放大系数则逐渐减小,加速度放大系数变化幅度随地震强度的增大而逐渐减小。(2)与上盖一体化地铁车站结构相比,上盖密贴地铁车站中柱上部监测点的加速度峰值和放大系数相对较小,而底部监测点则相对较大。(3)上盖地铁车站各测点的应变幅值表现为随着输入地震强度的增加逐渐增大;当地震强度较小时,两种试验工况下应变幅值相差较小,当地震强度较大时,上盖一体化地铁车站结构的应变增幅明显大于上盖密贴地铁车站结构。研究成果可为上盖地铁车站结构的抗震设计与分析提供参考依据。

Abstract

In order to study the seismic response law of subway station structure with superstructure, two kinds of subway superstructure systems were taken as research objects, and shaking table test was carried out in silty sand site field. The seismic response of subway station structure was studied from acceleration and strain, and the two test results were compared. The test data show that: (1) With the increase of input seismic intensity, the soil acceleration peak value of the monitoring points increases, but the acceleration amplification coefficient and the amplitude of acceleration magnification factor decreases. (2) Compared with the integrated subway station structure with upper cover, the acceleration peak value and amplification coefficient of the upper monitoring point close to the middle column of the subway station are relatively small, while those of the monitoring point at the bottom are relatively large. (3) The strain amplitude of each measuring point in the superstructure subway station gradually increases with the increase of input earthquake intensity. When the earthquake intensity is low, the difference of strain amplitude between the two test conditions is small. When the earthquake intensity is high, the strain increase of the integrated subway station structure with upper cover is obviously larger than that of the closely attached subway station structure with upper cover. The research results can provide reference for seismic design and analysis of superstructure subway station structure. 

关键词

上盖地铁车站结构 / 地震响应 / 数值分析 / 振动台试验 / 自由场

Key words

Upper cover subway station structure / Seismic response / Numerical analysis / Shaking table test / Free field

引用本文

导出引用
韩学川,陶连金,张宇,贾志波. 上盖地铁车站结构振动台试验对比研究[J]. 振动与冲击, 2021, 40(24): 65-74
HAN Xuechuan,TAO Lianjin,ZHANG Yu,JIA Zhibo. A comparative study on the shaking table test of a superstructure subway station structure[J]. Journal of Vibration and Shock, 2021, 40(24): 65-74

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