Influence of construction method on the load bearing capacity of skew masonry arches
Influence of construction method on the load bearing capacity of skew masonry arches
复制标题
施工方法对斜砌拱承载力的影响
DOI：
10.1016/j.engstruct.2018.05.005
复制
发表时间：
2018
影响因子：
5.5
通讯作者：
K. Bagi
中科院分区：
文献类型：
--
作者：
T. Forgács;V. Sarhosis;K. Bagi
本文研究了施工方法（如假斜、螺旋、对数法）对单跨斜交砌体拱受力性能和承载力的影响。基于离散元分析方法，用三维计算软件进行模拟。砖石斜拱的每一块石头/砖都由一个不同的块表示。砂浆接缝被建模为零厚度接口，可以打开和关闭取决于施加到它们的应力的大小和方向。研究的变量是施工方法、斜交角、砌体块的尺寸和活荷载沿拱跨沿着的临界位置。在每个斜交拱上，递增地施加全宽垂直线荷载，直至坍塌。结果表明，对于采用伪斜法施工的砌体斜拱，随着斜交角的增大，拱内砌体间的滑移量增大，破坏荷载减小。然而，对于使用螺旋线和对数方法建造的斜交砌体拱，随着斜交角的增加，破坏荷载增加。根据接触摩擦角和施工方法确定了三种不同的特征失效模式。这些观察提供了新的见解的行为，并导致理解斜拱的承载能力和破坏模式的建议。
This paper investigates the influence of construction method (e.g. false skew, helicoidal and logarithmic method) on the mechanical behaviour and load carrying capacity of single span skew masonry arches. Simulations were performed with the three dimensional computational software, based on the Discrete Element Method of analysis. Each stone/brick of the masonry skew arch was represented by 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 construction method, the angle of skew, the size of masonry blocks and the critical location of the live load along the span of the arch. At each skew arch, a full width vertical line load was applied incrementally until collapse. From the results analysis, it was found that for a skew masonry arch constructed using the false skew method, as the angle of skew increase, sliding between voussoirs in the arch increases and failure load decreases. However, for skew masonry arches constructed using the helicoidal and logarithmic method, as the angle of skew increases, the failure load increases. Three different characteristic failure modes were identified depending on the contact friction angle and the method of construction. These observations provide new insight into the behaviour and lead to suggestions for understanding the load carrying capacity and failure mode of skew arches.