ABSTRACT

The paper investigates the effectiveness of two-dimensional Discrete Element Method as a tool for structural analysis of arches provided with buttresses and backfill and strengthened with externally bonded reinforcement. Masonry vault and buttresses are modelled as an assembly of 2D rigid blocks interacting through non-linear contact joints, the backfill is discretized into deformable elastic-plastic triangular elements, while the reinforcement is modelled by means of truss elements bonded to the substrate through non-linear springs. A parametric analysis on the influence of material parameters and the effect of the discretization of the backfill is carried out, and the outcome of different reinforcement systems, consisting of Steel Reinforced Grout applied either at the intrados or at the extrados, are analysed. The comparison with experimental full-scale tests proved the ability of the numerical approach to capture hinges position, load bearing capability, as well as the increase in deflection and load capacity provided by the reinforcement.

摘要

本文研究了二维离散元方法作为具有支撑和回填的拱结构分析工具的有效性，并用外部结合钢筋加固。砌体拱顶和扶壁被建模为通过非线性接触接头相互作用的 2D 刚性块的组合，回填被离散为可变形的弹塑性三角形单元，而钢筋则通过通过非接触连接到基板的桁架单元进行建模。线性弹簧。对材料参数的影响和回填土的离散化的影响进行了参数分析，并分析了不同加固系统的结果，这些加固系统由应用于内弧或外弧的钢增强灌浆组成。