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Cracking and load-deformation behavior of fiber reinforced concrete: Influence of testing method

机译:纤维混凝土的裂缝和荷载 - 变形特性:试验方法的影响

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摘要

The characterization of the tensile behavior of cementitious materials has been a long-standing researchtopic and a general consensus on how to accomplish this task has not yet been reached. Many standardized tests are available but each with different test set-up and prescriptions on the definition ofmeasured and derived parameters, including toughness, elastic properties and strength. This paperdiscusses a number of test procedures for selected material properties including tension and flexure. Acomparative experimental study was carried out using two distinct fiber reinforced cementitious composites with strain hardening and strain softening behavior. Digital Image Correlation was utilized in the experimental program to detect and quantify the formation of cracks. Results show that the different test methodologies valuate specific aspects of material performance. The outcome of these evaluation procedures is compared and critically analyzed.
机译:胶结材料拉伸性能的表征一直是一个长期的研究课题,尚未就如何完成这一任务达成共识。可以使用许多标准化测试,但是每种测试都有不同的测试设置和有关测量和导出参数(包括韧性,弹性特性和强度)定义的规定。本文讨论了一些针对选定材料特性的测试程序,包括拉伸和弯曲。使用两种具有应变硬化和应变软化特性的纤维增强水泥基复合材料进行了对比实验研究。实验程序中使用了数字图像相关技术来检测和量化裂纹的形成。结果表明,不同的测试方法评估材料性能的特定方面。比较并严格分析了这些评估程序的结果。

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