Numerical analysis of large multifork surge-shaft lining structure under seismic action

YE Chao; XIAO Ming; YANG Ya-ling

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Numerical analysis of large multifork surge-shaft lining structure under seismic action

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- Numerical analysis of large multifork surge-shaft lining structure under seismic action
- Vol. 29, Issue S1, (2008)
- 作者机构：
  
  武汉大学水资源与水电工程科学国家重点实验室,武汉,430072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TV554
- Online First：15 April 2016，
  
  Published：2008
- 稿件说明：
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YE Chao, XIAO Ming, YANG Ya-ling. Numerical analysis of large multifork surge-shaft lining structure under seismic action[J]. 2008, 29(S1).
DOI：

YE Chao, XIAO Ming, YANG Ya-ling. Numerical analysis of large multifork surge-shaft lining structure under seismic action[J]. 2008, 29(S1). DOI：

摘要

针对地震作用下的深埋多岔圆形调压井，采用三维非线性有限元对其洞室开挖及衬砌结构受力特性进行了计算分析。引入岩石弹塑性损伤本构关系模拟地下调压井洞室的开挖效应；基于模拟结构支护的隐式锚杆、锚索单元，提出了复杂体型的调压井洞室开挖支护及衬砌开裂的计算方法；采用波动场拟静法对地震波作用下混凝土衬砌结构受力、变形特性进行了计算，给出了衬砌开裂的裂缝宽度和结构配筋的计算公式。通过小湾水电站调压井的工程实例计算，分析了空间多岔调压井衬砌结构在地震作用下的变形、开裂特性和应力分布规律，验证了模型的合理性与计算方法的可行性，为强震地区大型复杂调压井结构设计施工和安全校核提供了新思路和参考依据。

Abstract

The seismic mechanical behavior of lining structure of deep-embedded cylindrical surge-shaft with multifork tunnel is analyzed by using 3D nonlinear FEM. Combined with the elastoplastic constitutive relations of rock mass

the implicit bolt element and anchorage cable element

a calculation method of excavations

supports and lining cracks of complex surge-shaft structure is presented. The stress and distortion characteristics of lining under seismic wave is calculated by using wave field pseudo-static method

also the calculation formula for the lining crack width and structural reinforcement is provided. By an actual engineering computation

the distortion characteristics and stress distribution rules of the dimensional multifork surge-shaft lining structure under seismic action are revealed

which verifies the rationality and feasibility of this method; and that provides a new idea and reference for the complex surge-shaft design and construction in meizoseismal area.

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