Properties of strain hardening ultra high performance fiber reinforced concrete (UHP-FRC) under direct tensile loading
Properties of strain hardening ultra high performance fiber reinforced concrete (UHP-FRC) under direct tensile loading
复制标题
DOI：
10.1016/j.cemconcomp.2013.12.015
复制
发表时间：
2014-04-01
影响因子：
10.5
通讯作者：
Naaman, A. E.
中科院分区：
文献类型：
--
作者：
Wille, K.;El-Tawil, S.;Naaman, A. E.
增强的基体堆积密度和定制的纤维-基体界面结合性能导致了超高性能纤维增强混凝土（UHP-FRC）的最新发展，在强度、延展性和能量吸收能力方面提高了材料的拉伸性能。本研究的目的是对新材料的单轴拉伸性能进行实验研究和分析。本文回顾和分类了其他研究人员使用的各种拉伸试验装置，并提出了一种经过修订的拉伸装置，以最小的准备工作获得可靠的结果。实验研究考虑了三种不同体积分数的钢纤维。对UHP-FRCs的弹性、应变硬化和软化拉伸参数（如首次开裂应力和应变、弹性和应变硬化模量、复合强度和耗能能力）进行表征和分析，并将其与微观分析观察到的裂纹模式联系起来。提出了表示材料拉伸应力-应变响应的模型。(C) 2014 Elsevier Ltd.版权所有。
Enhanced matrix packing density and tailored fiber-to-matrix interface bond properties have led to the recent development of ultra-high performance fiber reinforced concrete (UHP-FRC) with improved material tensile performance in terms of strength, ductility and energy absorption capacity. The objective of this research is to experimentally investigate and analyze the uniaxial tensile behavior of the new material. The paper reviews and categorizes a variety of tensile test setups used by other researchers and presents a revised tensile set up tailored to obtain reliable results with minimal preparation effort. The experimental investigation considers three types of steel fibers, each in three different volume fractions. Elastic, strain hardening and softening tensile parameters, such as first cracking stress and strain, elastic and strain hardening modulus, composite strength and energy dissipation capacity, of the UHP-FRCs are characterized, analyzed and linked to the crack pattern observed by microscopic analysis. Models are proposed for representing the tensile stress-strain response of the material. (C) 2014 Elsevier Ltd. All rights reserved.