利用双向收敛值的通缝盾构隧道纵缝张开量计算方法
发布时间：2019-05-11 10:31
【摘要】：以上海地铁中广泛使用的通缝拼装盾构管片衬砌为研究对象,通过对结构自由度的理论分析,提出一种的新的纵缝张开量计算方法。该方法提出两种基本变形模态,进而应用基本模态线性叠加的思想,通过水平与竖直方向收敛值确定两个基本模态的参与系数,最终根据基本模态线性叠加的结果确定各个纵缝的张开量。多组有限元数值算例表明,该方法对于不同的纵缝抗弯刚度与不同的荷载情况均有较好的准确性。利用已公开发表的整环盾构管片加载试验数据,进一步验证了该计算方法的可靠性,并反演计算出该试验中纵缝接头抗弯刚度的大致范围。研究成果可为运营地铁隧道的健康监测提供一定的理论依据。
[Abstract]:Taking the shield segment lining, which is widely used in Shanghai Metro, as the research object, a new calculation method of longitudinal joint opening is put forward through the theoretical analysis of the degree of freedom of the structure. In this method, two basic deformation modes are proposed, and then the participation coefficients of the two basic modes are determined by the convergence values of horizontal and vertical directions by using the idea of linear superposition of basic modes. Finally, according to the results of linear superposition of basic modes, the opening amount of each longitudinal seam is determined. Numerical examples of multi-group finite element method show that the method is accurate for different longitudinal joint bending stiffness and different load conditions. Based on the published test data of the whole ring shield segment loading, the reliability of the calculation method is further verified, and the approximate range of bending stiffness of the longitudinal joint in the test is inversely calculated. The research results can provide a certain theoretical basis for the health monitoring of subway tunnel operation.
【作者单位】： 同济大学地下建筑与工程系;同济大学建筑设计研究院(集团)有限公司;
【分类号】：U455.43
本文编号：2474420
[Abstract]:Taking the shield segment lining, which is widely used in Shanghai Metro, as the research object, a new calculation method of longitudinal joint opening is put forward through the theoretical analysis of the degree of freedom of the structure. In this method, two basic deformation modes are proposed, and then the participation coefficients of the two basic modes are determined by the convergence values of horizontal and vertical directions by using the idea of linear superposition of basic modes. Finally, according to the results of linear superposition of basic modes, the opening amount of each longitudinal seam is determined. Numerical examples of multi-group finite element method show that the method is accurate for different longitudinal joint bending stiffness and different load conditions. Based on the published test data of the whole ring shield segment loading, the reliability of the calculation method is further verified, and the approximate range of bending stiffness of the longitudinal joint in the test is inversely calculated. The research results can provide a certain theoretical basis for the health monitoring of subway tunnel operation.
【作者单位】： 同济大学地下建筑与工程系;同济大学建筑设计研究院(集团)有限公司;
【分类号】：U455.43
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