基于Pushover方法的漫滩软土区地铁车站抗震分析

姚任行; 涂智溢; 王仰君; 蒋家卫; 吴琪; 张江伟

doi:10.11899/zzfy20230318

基于Pushover方法的漫滩软土区地铁车站抗震分析

doi: 10.11899/zzfy20230318

1.
宁波市轨道交通集团有限公司建设分公司, 浙江宁波 315100
2.
浙江数智交院科技股份有限公司, 浙江宁波 315100
3.
南京工业大学, 岩土工程研究所, 南京 210009
4.
河北地质大学 , 城市地质与工程学院, 石家庄 050031

基金项目: 国家自然科学基金（52008206）；河北省自然科学基金（E2019403153）

详细信息

作者简介:
姚任行，男，生于1984年。硕士。主要从事城市轨道交通防灾减灾研究。E-mail：13615740671@139.com

通讯作者:
吴琪，男，生于1991年。博士，副教授，硕士生导师。主要从事海洋岩土动力特性研究。E-mail：qw09061801@163.com

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出版历程
- 收稿日期: 2022-03-07
- 刊出日期: 2023-08-31

Pushover Method Based Seismic Analysis for Subway Station Built in the Floodplain Soft Soil Area

1.
Ningbo Rail Transportation Group Co., Ltd., Ningbo 315101, Zhejiang, China
2.
Zhejiang Institute of Communications Co., Ltd., Ningbo 315101, Zhejiang, China
3.
Institute of Geotechnical Engineering, Nanjing Tech University, Nanjing 210009, China
4.
School of Urban and Geological Engineering, Hebei GEO University, Shijiazhuang 050031, China

摘要

摘要: 为研究地下结构Pushover分析方法在不同条件下的适用性，基于有限元软件平台，建立长江漫滩区地铁车站土-结构二维有限元分析模型，分别采用非线性动力时程分析方法与地下结构Pushover分析方法对5种不同土体刚度模型进行抗震分析。峰值层间位移角与峰值内力的分析结果表明，当土体刚度与结构刚度一致时，地下结构Pushover分析方法计算结果与非线性动力时程分析方法计算结果相近，而当土体刚度小于结构刚度或土体刚度大于结构刚度时，Pushover分析方法计算精度下降。
- 地下结构 /
- Pushover分析方法 /
- 土体刚度 /
- 抗震分析 /
- 长江漫滩区
Abstract: This paper is to study the applicability of the underground structure pushover analysis method under different conditions. Based on the finite element software platform, the soil-structure two-dimensional finite element analysis model based on the cross section of the subway station located in Yangtze River floodplain aera was established. The nonlinear dynamic time history analysis method and the pushover analysis method are respectively used for seismic analysis of five models with different soil stiffness. The analysis results based on the peak inter-layer displacement angle and the peak internal force show that, when the soil stiffness is consistent with the structural stiffness, the calculation results of the pushover analysis method are very close to the results of the nonlinear dynamic time history analysis method. However, when the soil stiffness is less than the structural stiffness or when the soil stiffness is greater than the structural stiffness, the calculation accuracy of the pushover analysis method will decrease significantly.
- Underground structure /
- Pushover analysis method /
- Soil stiffness /
- Seismic analysis /
- Yangtze River floodplain

HTML全文

图 1 地下结构Pushover方法力学模型

Figure 1. Mechanics model of underground structure pushover method

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图 2 地铁车站断面尺寸

Figure 2. Section dimension of subway station

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图 3 有限元分析模型

Figure 3. Finite element analysis model

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图 4 加速度时程曲线

Figure 4. Acceleration time history curve

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表 1 地铁车站土层物理参数

Table 1. The soil parameters of subway station

编号	土体	深度/m	密度/（kg·m⁻³）	剪切波速/（m·s⁻¹）	泊松比
1	回填土	2	1 700	147	0.35
2	粉质黏土	6	2 020	190	0.35
3	黏土	7	2 000	193	0.36
4	粉细砂	2	2 050	274	0.33
5	黏土	10	2 020	300	0.36
6	粉细砂	3	2 050	328	0.33
7	黏土	2	1 990	331	0.36
8	细砂	6	2 050	368	0.33
9	粉质黏土	7	2 000	382	0.35
10	花岗岩	—	2 500	700	0.25

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表 2 计算结果

Table 2. Summary of calculation results

工况编号	土-结构刚度比	层间位移角/mm		轴力/（kN·m⁻¹）		剪力/（kN·m⁻¹）		弯矩/[（kN·m）m⁻¹]
工况编号	土-结构刚度比	动力时程分析	Pushover分析	动力时程分析	Pushover分析	动力时程分析	Pushover分析	动力时程分析	Pushover分析
A	0.25	1.69	1.580	1 311	1 295	111	110	412	415
B	0.36	1.47	1.500	1 309	1 280	113	112	414	416
C	1.00	0.89	0.895	1 269	1 249	104	104	372	369
D	1.40	0.57	0.490	1 183	1 167	78	69	270	238
F	2.00	0.38	0.340	1 142	1 140	59	54	201	182

下载: 导出CSV

表 3 计算误差

Table 3. Computed error

工况编号	土-结构刚度比	层间位移角误差/%	轴力误差/%	剪力误差/%	弯矩误差/%
A	0.25	−6.51	−1.22	−4.5	1.46
B	0.36	2.04	−2.22	−4.42	2.9
C	1.00	0.56	−1.58	0.96	−0.81
D	1.40	−14.04	−1.35	−11.54	−11.85
F	2.00	−10.53	−0.18	−8.47	−9.45

下载: 导出CSV

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