The compressive resistance of concrete in new structures is usually characterized on the basis of tests performed on concrete cylinders or cubes under relatively rapid loading conditions. Although efficient for material characterization, these tests do not acknowledge a number of phenomena potentially influencing the compressive resistance of concrete in actual structures. For this reason, when performing a structural analysis, strength reduction factors are usually considered in codes of practice modifying the uniaxial strength of material tests. In this paper, a detailed investigation of the influence of material brittleness and internal stress redistributions on the structural response of reinforced concrete members is presented. This work is based on a number of theoretical considerations and supported by the experimental results of more than 400 reinforced concrete columns tested with or without eccentricity and gathered from the literature. The results show the pertinence of considering a brittleness factor in the calculation of the structural resistance of reinforced concrete columns and compression zones of beams. The results of this work are eventually formulated in terms of code‐like proposals, currently considered in the draft of the new Eurocode 2 (prEN 1992‐1‐1:2018).

中文翻译：

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混凝土抗压强度：从材料表征到结构值

新结构中混凝土的抗压强度通常基于在相对快速的载荷条件下对混凝土圆柱体或立方体进行的测试来表征。尽管可以有效地表征材料，但这些测试并未发现许多可能影响实际结构中混凝土抗压强度的现象。因此，在进行结构分析时，通常在修改材料测试的单轴强度的操作规范中考虑强度减小因子。本文详细研究了材料脆性和内应力重新分布对钢筋混凝土构件结构响应的影响。这项工作基于许多理论考虑，并得到了400多个有或没有偏心率的钢筋混凝土柱的试验结果的支持，并从文献中收集了数据。结果表明，在计算钢筋混凝土柱和梁的受压区的结构阻力时，考虑脆性因子是有意义的。最终，这项工作的结果是根据类似代码的提案来制定的，目前已在新的《欧洲规范2》（prEN 1992-1-1-1：2018）草案中进行了审议。