论文标题
带有嵌入式的不连续性的宏建模连续方法，以评估地震载荷下的砖石拱桥
A macro modelling continuum approach with embedded discontinuities for the assessment of masonry arch bridges under earthquake loading
论文作者
论文摘要
该论文提出了一种有效的宏观建模方法，利用具有嵌入式不连续性的各向异性材料模型，用于砌体拱门和循环负载下的桥梁，包括地震引起的动态作用。静态和动态载荷下的砖石拱桥的现实数值模拟需要准确的模型，这些模型代表砌体和材料非线性的阴离子性质，这是由于拉伸裂纹的打开和闭合而导致的，沿砂浆接头的剪切裂纹和剪切滑动。提出的3D建模方法允许通过简单的校准建立砌体键，并可以表示砖砌中的拉伸裂纹，压碎和剪切损伤。采用了两尺度表示，其中3D连续元素在结构尺度上与代表材料中介质结构的嵌入式非线性接口有关。在静态和动态载荷下，在数值示例中显示了所提出方法的潜在和准确性，并与砌体拱门和桥梁上的物理实验进行了比较。
The paper presents an effective macro-modelling approach, utilising an anisotropic material model with embedded discontinuities, for masonry arches and bridges under cyclic loading, including dynamic actions induced by earthquakes. Realistic numerical simulations of masonry arch bridges under static and dynamic loading require accurate models representing the anionotropic nature of masonry and material nonlinearity due to opening and closure of tensile cracks and shear sliding along mortar joints. The proposed 3D modelling approach allows for masonry bond via simple calibration, and enables the representation of tensile cracking, crushing and shear damage in the brickwork. A two-scale representation is adopted, where 3D continuum elements at the structural scale are linked to embedded nonlinear interfaces representing the meso-structure of the material. The potential and accuracy of the proposed approach are shown in numerical examples and comparisons against physical experiments on masonry arches and bridges under static and dynamic loading.
