摘 要
城市地下综合管廊作为现代城市基础设施的重要组成部分，其抗震性能直接关系到城市生命线系统的安全运行。随着城市化进程加快和地震灾害频发，如何科学评估综合管廊的抗震性能成为工程界关注的重点问题。本文旨在系统梳理现有抗震性能评估方法的基础上，提出一种结合数值模拟与性能指标分析的综合评估框架。研究采用非线性时程分析法，结合典型地质条件建立三维有限元模型，并引入位移延性比、能量耗散能力及残余变形等关键性能指标，对不同结构形式的地下综合管廊进行抗震性能对比分析。结果表明，所提出的评估方法能够有效反映结构在地震作用下的响应特征与破坏模式，具有较强的适用性与可操作性。本研究的创新点在于构建了多指标融合的抗震性能评价体系，并通过实际工程案例验证了方法的有效性，为城市地下综合管廊的抗震设计与安全性评估提供了理论支持和技术参考。
关键词：城市地下综合管廊；抗震性能评估；非线性时程分析；多指标评价体系；三维有限元模型
ABSTRACT
As an essential component of modern urban infrastructure, the seismic performance of urban underground utility tunnels directly affects the safe operation of urban lifeline systems. With the acceleration of urbanization and frequent occurrences of earthquakes, how to scientifically evaluate the seismic performance of utility tunnels has become a key issue of concern in the engineering field. This paper aims to propose a comprehensive evaluation fr amework that combines numerical simulation with performance index analysis, based on a systematic review of existing seismic performance assessment methods. The study employs nonlinear time-history analysis to establish three-dimensional finite element models under typical geological conditions, and introduces key performance indicators such as displacement ductility ratio, energy dissipation capacity, and residual deformation for comparative analysis of the seismic performance of different structural types of underground utility tunnels. The results indicate that the proposed evaluation method can effectively reflect the structural response characteristics and failure modes under seismic action, demonstrating strong applicability and operability. The innovation of this study lies in the development of a multi-index integrated seismic performance evaluation system, with the effectiveness of the method verified through practical engineering cases, thereby providing theoretical support and technical reference for seismic design and safety assessment of urban underground utility tunnels.
Keywords: Urban Underground Utility Tunnel; Seismic Performance Evaluation; Nonlinear Time History Analysis; Multi Index Evaluation System; Three Dimensional Finite Element Model
目 录
摘 要 I
ABSTRACT II
第1章 绪论 2
1.1 背景与意义 2
1.2 国内外研究现状综述 2
1.3 本文研究方法与技术路线 2
第2章 地下综合管廊抗震性能评估的理论基础 4
2.1 地下结构抗震设计的基本原理 4
2.2 抗震性能评估的主要指标体系 4
2.3 地震动输入模型与场地效应分析 5
2.4 管廊结构动力响应特征分析 5
第3章 城市地下综合管廊抗震评估的数值模拟方法 7
3.1 有限元建模与参数设定 7
3.2 多遇地震下的线性动力分析 7
3.3 罕遇地震下的非线性响应模拟 8
3.4 模拟结果与工程实际的对比验证 8
第4章 城市地下综合管廊抗震性能评估的工程应用 10
4.1 典型工程案例选取与背景介绍 10
4.2 抗震性能评估流程实施 10
4.3 结构薄弱部位识别与改进措施 11
4.4 工程评估结果的可靠性分析 11
结论 13
参考文献 14
致 谢 15
