This paper investigates the role of masonry elastoplastic constitutive models on tunnelling-induced damage in buildings. A two-stage analysis method (TSAM) is adopted, incorporating input greenfield displacements, 3D masonry walls, and an elastic model for the soil. The paper focuses on four masonry constitutive models that can be readily adopted for routine analysis in industry. Comparison of in-plane yield surfaces with experimental data indicates that, among the considered masonry models, the Concrete Damaged Plasticity model under biaxial calibration gives the best overall performance. The TSAM is then used to study selected tunnel-masonry wall scenarios, confirming a significant effect of the constitutive model and its parameters on masonry wall response to tunnelling, particularly after volume losses where moderate damage is triggered. Also, as masonry stress paths are shown to concentrate in the tensile–compressive areas, with damage prediction being sensitive to the yield surface within this quadrant, numerical damage predictions must rely on the accurate calibration of the constitutive model in the tensile–compressive quadrants. This appraisal indicates that, in the context of routine structure modelling for tunnelling assessments, the selection of elastoplastic masonry models and their biaxial calibration have a non-negligible impact on the damage category estimate.

中文翻译：

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隧道诱发的墙体损伤：砌体弹塑性本构模型评价


本文研究了砌体弹塑性本构模型对建筑物隧道诱发损伤的作用。采用两阶段分析方法 （TSAM），包括输入的绿地位移、3D 砌体墙和土壤弹性模型。本文重点介绍了四种砌体本构模型，这些模型可以很容易地用于工业中的常规分析。面内屈服面与实验数据的比较表明，在所考虑的砌体模型中，双轴校准下的混凝土损伤塑性模型提供了最佳的整体性能。然后，TSAM 用于研究选定的隧道砌体墙情景，确认本构模型及其参数对砌体墙对隧道响应的显着影响，特别是在引发中度损坏的体积损失之后。此外，由于砖石应力路径集中在拉伸-压缩区域，损伤预测对该象限内的屈服面敏感，因此数值损伤预测必须依赖于拉伸-压缩象限中本构模型的准确校准。该评估表明，在隧道评估的常规结构建模背景下，弹塑性砌体模型的选择及其双轴校准对损伤类别估计的影响不可忽视。