首页期刊在线 2022年（第25卷）第8期

不同类型地震波作用下软土场地地铁车站动力响应试验研究

张志明1,2姚贵1袁勇3

Experimental Study on Dynamic Response of Metro Station in Soft Soil Site under Different Types of Seismic Waves

ZHANG ZhimingYAO GuiYUAN Yong

作者信息:

1.1. 贵州大学土木工程学院， 550025，贵阳；
2.2. 贵州大学贵州省岩土力学与工程安全重点实验室， 550025，贵阳；
3.3. 同济大学土木工程防灾国家重点实验室， 200092，上海
Affiliation:

School of Civil Engineering, Guizhou University, 550025, Guiyang, China
关键词:

地铁车站;软土场地;地震响应;振动台试验
Key words:

metro station;soft soil site;seismic response;shaking table test
DOI:

10.16037/j.1007-869x.2022.08.044
中图分类号/CLCN:

U442.5+5∶U231.4
栏目/Col:

其他

摘要:

依托上海某软土场地框架式地铁车站开展了振动台模型试验，通过在模型基底输入相同峰值加速度、不同频率成分的地震波，研究不同频谱特性的地震波对近场和远场加速度，以及车站结构的加速度、动应变、轴力和弯矩等动力响应的影响规律。研究结果表明:地震波的频率成分将同时影响场地、车站结构的加速度大小及其沿场地深度的分布，低频丰富的地震波对加速度的放大效应更加显著；不同频谱特性的地震波对结构不同类型动力响应的影响规律不同。

Abstracts:

Based on a frame-type metro station in Shanghai certain soft soil site,a shaking table model test is carried out. By inputting seismic waves with the same peak acceleration and different frequency components at model base, the effects of seismic waves with different spectral characteristics on near-field and far-field acceleration, station structure dynamic response such as acceleration, dynamic strain, axial force and bending moment are studied. Results show that frequency component of seismic wave will affect both the acceleration amplitude and distribution along the depth for site and station structure. For seismic wave rich in low-frequency components, its acceleration amplification effect is more significant. The influencing mechanisms of seismic waves with different spectral characteristics on different types of structural dynamic responses are different.