The effects of block shape on the seismic behavior of dry-stone masonry retaining walls: A numerical investigation by discrete element modeling
The effects of block shape on the seismic behavior of dry-stone masonry retaining walls: A numerical investigation by discrete element modeling
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DOI：
10.1016/j.sandf.2014.11.007
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发表时间：
2014-12
影响因子：
3.7
通讯作者：
Y. Fukumoto;J. Yoshida;H. Sakaguchi;A. Murakami
中科院分区：
文献类型：
--
作者：
Y. Fukumoto;J. Yoshida;H. Sakaguchi;A. Murakami
通过离心模型试验和三维离散元法数值模拟，研究了干石砌体挡土墙砌块在地震荷载作用下的形状效应。比较了块状的变化，即立方形和楔形。物理实验和数值模拟结果均表明，楔形块体壁的地震电阻率高于长方体块体壁，尽管长方体块体壁的总质量更大。因此，通过离散元模型对形状效应的机理进行了详细的研究。研究发现，表面积是影响干石砌体挡土墙抗震强度的关键参数，它决定了每块砌块与回填体之间的摩擦阻力。
The shape effect of the blocks comprising a dry-stone masonry retaining wall under seismic loading was investigated through centrifuge model tests and numerical simulations using the three-dimensional discrete element method. Variations in block shape, namely, cubic-shaped and wedge-shaped, were compared. For both the physical experiments and the numerical simulations, seismic resistivity was higher in the wall of wedge-shaped blocks than in the wall of cuboid blocks, although the total mass was larger for the wall of cuboid blocks. Therefore, a detailed investigation was performed by the discrete element model to explore the mechanism of the shape effect. We found that the surface area, which contributes to the frictional resistance between each stone block and the backfill, is the key parameter to mobilizing the anti-seismic strength of a dry-stone masonry retaining wall.