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Finite element analysis and fragility curves for the evaluation of restoration mortars behavior regarding the earthquake protection of historic structures

机译:评估历史建筑抗震保护砂浆性能的有限元分析和脆性曲线

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摘要

The target of this study is the evaluation of repair mortar contribution to the dynamic behavior of Kaisariani Monastery in Athens, by using the tools of finite element analysis and fragility curves. Three types of mortars (concrete) are designed in order to simulate the Hagia Sophia historic mortar, by using different binding material: lime/metakaolin, hydraulic lime, lime/cement. In the developed model the mechanical characteristics of the designed mortars are used. In addition, fragility curves were developed and their results indicated that for the current situation of Kaisariani Monastery and for peak ground acceleration (PGA) value > 0.24 g, the probability of occurrence of serious damage is 59%. For PGA= 0.36 g an overall failure happened. For PGA=0.40 and by using restoration mortar up to 15% of the total bed joint the failure percentage reduces in the range of 12-30%. Better protection is reported for lime/ cement mix design followed by hydraulic lime and lime/metakaolin.
机译:本研究的目标是使用有限元分析和脆性曲线工具评估修补砂浆对雅典凯萨里阿里修道院的动态行为的贡献。为了模拟圣索非亚大教堂历史悠久的砂浆,设计了三种类型的砂浆(水泥浆),方法是使用不同的粘结材料:石灰/偏高岭土,水硬性石灰,石灰/水泥。在开发的模型中,使用了设计的砂浆的机械特性。此外,还绘制了脆性曲线,其结果表明,对于Kaisariani修道院的当前状况和峰值地面加速度(PGA)值> 0.24 g,发生严重破坏的可能性为59%。对于PGA = 0.36g,发生了整体故障。对于PGA = 0.40并通过使用修复砂浆最多占总床缝的15%,破坏率降低了12-30%。据报道,石灰/水泥混合物设计得到了更好的保护,其次是水硬石灰和石灰/偏高岭土。

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