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Assessment of analytical formulations for the ULS resistance verification of structural glass elements accounting for the effects of different load durations

机译：评估用于分析结构玻璃元件的ULS阻力的分析配方，考虑了不同载荷持续时间的影响

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Glass is an increasingly used material in construction and buildings. Despite its large application as load-bearing construction material, several aspects related to safe and optimal design are still under investigation and exploration, towards the full implementation of standardized and conservative rules of practical use. One of the main concerns in the design of this typically tensile brittle material is given by the rational estimation of static fatigue phenomena, under the effects of multiple design loads. In this paper, careful consideration is paid to the Ultimate Limit State (ULS) resistance verification of structural glass elements under a combination of variable loads with assigned duration. Taking advantage of past literature contributions and existing design standards for glass, an assessment of several available formulations to account for the cumulative stress effects of combined design loads is first carried out by means of selected case studies and extended parametric analytical calculations. Based on the obtained results, an alternative, simplified but practical and rather accurate - compared to the exact theoretical model - linear formulation is also finally proposed to account for static fatigue phenomena in load-bearing glass elements.
机译：玻璃是建筑和建筑物中使用越来越多的材料。尽管将其广泛用作承重建筑材料，但仍在研究和探索与安全和最佳设计有关的几个方面，以全面实施标准化和保守的实际使用规则。这种典型的拉伸脆性材料在设计中的主要问题之一是在多个设计载荷的影响下，合理估计静态疲劳现象。在本文中，应仔细考虑结构玻璃元件在分配有指定持续时间的可变载荷组合下的极限极限状态（ULS）电阻验证。利用过去的文献资料和玻璃的现有设计标准，首先通过选定的案例研究和扩展的参数分析计算，对几种可用配方进行评估，以说明组合设计载荷的累积应力效应。根据获得的结果，最后提出了一种替代方法，与精确的理论模型相比，该方法简化了但实用且相当准确，因此提出了线性公式来解决承载玻璃元件中的静态疲劳现象。

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