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Influence of the Chloride Attack on the Post-Cracking Behavior of Recycled Steel Fiber Reinforced Concrete

机译:氯化物攻击对再生钢纤维钢筋混凝土后开裂行为的影响

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摘要

The main purpose of the present work is to study the mechanical behavior and durability performance of recycled steel fiber reinforced concrete (RSFRC) under a chloride environment. To this end, the effect of chloride attack on the load-carrying capacity of pre-cracked RSFRC round panels is investigated by performing round panel tests supported on three points (RPT-3ps), considering the influence of the crack width and the fiber distribution/orientation profile. In addition, the influence of the adopted chloride exposure conditions on the post-cracking constitutive laws of the developed RSFRC is also assessed by performing numerical simulations for the prediction of the long-term performance of RSFRC under these aggressive conditions. The tensile stress–crack width relationship of RSFRC is derived by performing an inverse analysis with the RPT-3ps results. The obtained experimental and numerical results show a negligible effect of the chloride attack on the post-cracking behavior of RSFRC for the chloride exposure conditions and pre-crack width levels adopted in this study.
机译:本作本作的主要目的是研究氯化物环境下再生钢纤维钢筋混凝土(RSFRC)的力学行为和耐用性能。为此,考虑到裂缝宽度和纤维分布的影响,通过执行支撑的圆面板测试来研究氯化物攻击对预裂纹RSFRC圆形面板的承载能力的影响。 /方向剖面。此外,还通过对这些侵略性条件进行了预测RSFRC的长期性能来评估所发育的氯化物暴露条件对发达的RSFRC的后裂解本构规则的影响。通过使用RPT-3PS结果进行逆分析来导出RSFRC的拉伸应力裂纹宽度关系。所获得的实验性和数值结果表明氯化物侵蚀对氯化物暴露条件和本研究采用的前裂纹宽度水平的氯化物侵蚀对RSFRC的后开裂行为的效果可忽略不计。

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