The effect of skew angle on the mechanical behaviour of masonry arches
The effect of skew angle on the mechanical behaviour of masonry arches
复制标题
斜交角度对砌体拱受力性能的影响
DOI：
10.1016/j.mechrescom.2014.07.008
复制
发表时间：
2014
影响因子：
2.4
通讯作者：
P. Lourenço
中科院分区：
文献类型：
--
作者：
V. Sarhosis;D. Oliveira;J. Lemos;P. Lourenço
本文介绍了基于离散元法 (DEM) 的三维计算模型的开发，该模型用于研究倾斜角度对 28 个不同几何形状的单跨石砌拱的承载能力的影响。拱门的每块石头都被表示为一个独特的块。砂浆接缝被建模为零厚度界面，该界面可以根据施加到其上的应力的大小和方向而打开和关闭。研究的变量是拱跨度、跨度：立度比和斜角。在每个拱上，全宽垂直线荷载逐渐施加到四分之一跨度的外拱上，直到倒塌。在每次载荷增量时，记录裂纹的发展和垂直偏转轮廓。结果与类似的“方形”（或规则）拱门进行了比较。结果分析发现，倾斜角的增加会增加拱的扭转行为，最终导致在较低荷载下发生破坏。此外，偏斜角对砌体拱所能承受的极限荷载的影响对于节段拱比圆形拱更显着。
This paper presents the development of a three dimensional computational model, based on the Discrete Element Method (DEM), which was used to investigate the effect of the angle of skew on the load carrying capacity of twenty-eight different in geometry single span stone masonry arches. Each stone of the arch was represented as a distinct block. Mortar joints were modelled as zero thickness interfaces which can open and close depending on the magnitude and direction of the stresses applied to them. The variables investigated were the arch span, the span: rise ratio and the skew angle. At each arch, a full width vertical line load was applied incrementally to the extrados at quarter span until collapse. At each load increment, the crack development and vertical deflection profile was recorded. The results compared with similar “square” (or regular) arches. From the results analysis, it was found that an increase in the angle of skew will increase the twisting behaviour of the arch and will eventually cause failure to occur at a lower load. Also, the effect of the angle of skew on the ultimate load that the masonry arch can carry is more significant for segmental arches than circular one.