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高速列车振动下盾构隧道交叉结构动力响应及其损伤特性分析
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摘要
针对高速列车振动对盾构隧道与联络横通道交叉结构影响问题,以国内某高铁盾构隧道为对象,采用实测的列车振动荷载曲线,基于规范推荐混凝土应力-应变关系与应变等效性假设推导的损伤演化方程,建立三维数值分析模型,研究了盾构隧道与横通道交叉结构加速度、应力响应规律及其损伤特性,所得结果可为高铁盾构隧道设计提供一定的参考。
According to the effect of vibration induced from high speed train to cross structure of shield tunnel and transverse passage, a three-dimensional numerical model was performed to investigate the dynamic response and damage properties of cross structure in this paper. Based on a shield tunnel in high-speed-railway line in China, the measured vibration load curve of high speed train was used and the damage evolution model based on the stress-strain relationship recommend by code for concrete structure design and strain equivalence hypothesis was considered to analyze the vibration characteristics of the cross structure. The results of this research may provide some valuable reference for the design of shield tunnel in high speed railway.
引文
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