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Uncertainty analysis of the effect of grout injection on the deformation of multi-wythe stone masonry walls

机译:灌浆注射效果对多于砌体墙变形的不确定性分析

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摘要

The eighteenth century Prince of Wales Fort in Manitoba Canada has experienced extensive freezethaw damage and mortar washout within the escarp walls resulting in distress and failures at multiple locations. Injection of grout could counteract this degradation of structural stability. However existing literature provides little guidance as to the improvement level that could be expected, especially with respect to out-of-plane performance. As such, the proposed treatment was modelled to include a high level of uncertainty in the system through the application of a Random Field Finite Element Micromodelling technique. A Latin Hyper cube simulation method was used in conjunction with a parametric finite element model to randomize the material properties of each stone and relevant grouting layer. The numerical results predicted that the stone-grout bond was the most critical parameter in the proposed intervention, and that in the grouted wall sections, collapse would be avoided and lateral displacements stabilized with the proposed treatment.
机译:在加拿大马尼托巴省威尔士堡十八世纪王子经历造成痛苦和失败在多个位置陡坡带围墙内广泛的冻融破坏和砂浆冲刷。灌浆注射可以抵消结构稳定性的这种退化。然而现有的文献没有指导,以可预期的提高水平,尤其是相对于外的平面性能。因此,所提出的处理被建模为包括通过随机电磁场有限元Micromodelling技术的应用高水平的系统中的不确定性。结合使用具有一个参数有限元模型中的拉丁超立方模拟方法来随机每个石和相关灌浆层的材料性质。数值结果预测,石灰浆键是在所提出的干预最关键的参数,并且,在灌浆壁部分,崩溃将被避免并且与所提出的处理稳定化的横向位移。

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