| 深埋地下结构地震反应分析的局部反应加速度法 |
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| 引用本文： | 许紫刚,杜修力,徐长节,吴晔.深埋地下结构地震反应分析的局部反应加速度法[J].工程力学,2021,38(6):62-71. |
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| 作者姓名： | 许紫刚 杜修力 徐长节 吴晔 |
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| 作者单位： | 华东交通大学江西省岩土工程基础设施安全与控制重点实验室,江西,南昌 330013;北京工业大学城市与工程安全减灾教育部重点实验室,北京 100124;华东交通大学江西省岩土工程基础设施安全与控制重点实验室,江西,南昌 330013;浙江大学滨海和城市岩土研究中心,浙江,杭州 310058 |
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| 基金项目： | 国家重点研发计划项目(2018YFC1504305)；国家自然科学基金创新研究群体项目(51421005)；教育部“创新团队发展计划”项目(IRT13044) |
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| 摘 要： | 城市地下结构逐渐呈现埋深更大化、断面复杂化、空间立体化等特点,中国现行《城市轨道交通结构抗震设计规范》(GB?50909?2014)推荐采用的反应位移法和反应加速度法在计算大埋深或复杂断面地下结构的动力反应方面存在一定的局限性.在广义反应位移法和传统反应加速度法的基础上,该文提出一种适用于深埋地下结构地震反应分析的局部...
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| 关 键 词： | 地下结构 抗震分析 局部反应加速度法 深埋 简化分析方法 |
| 收稿时间： | 2020-06-19 |
LOCAL RESPONSE ACCELERATION METHOD FOR SEISMIC ANALYSIS OF DEEP BURIED UNDERGROUND STRUCTURES |
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| Affiliation: | 1.Jiangxi Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering, East China Jiaotong University, Nanchang, Jiangxi 330013, China2.Key Laboratory of Urban Security and Disaster Engineering of the Ministry of Education, Beijing University of Technology, Beijing 100124, China3.Research Center of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, Zhejiang 310058, China |
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| Abstract: | The urban underground structures gradually show the characteristics of larger buried depth, of complicated section and of stereoscopic space. The response displacement method (RDM) and response acceleration method (RAM) recommended by Code for Seismic Design of Urban Rail Transit Structures (GB 50909?2014) have some limitations in the seismic analysis of underground structures with large buried depth or complicated sections. Based on the generalized response displacement method (GRDM) and traditional RAM, this paper proposes the local response acceleration method (LRAM) for the seismic analysis of deep buried underground structures, and this method only needs to determine the acceleration and soil shear stress of the local free field. In combination with a tunnel structure with circle cross section, the validity of the proposed method with different heights of the model and different stiffness of the structure is verified by comparing with the results of the dynamic time history analysis method. The analysis results show that the proposed method is a practical analysis method with a simple operation. When the height of the model is 5 times that of the underground structure, a more accurate structural response can be obtained. |
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