土木工程与管理学报2017，Vol.34Issue(2)：19-24,6.
混杂纤维混凝土弯曲韧性评价体系
HFRC Flexural Toughness Evaluation System
摘要
Abstract
On the basis of the experimental data about the load-deflection curves of the 1% total fiber volume content, flexural toughness indexes In and fiber reinforced concrete energy absorption value Dn, which are belonging to the hybrid fiber reinforced concrete (HFRC) four-point bending test and notched beam bending test, this paper combined with the mechanical model and the flexural toughness rating index, the precision of load-deflection curves with the two experimental methods was analyzed with variance analysis, as well as the dispersion degree of calculation of flexural toughness indexes In and energy absorption value Dn under different deflection with statistical analysis. The analysis shows the good precision for the low content of hybrid fiber concrete of load-deflection curves of four-point bending test, is the same as the notched beam bending test. In notched beam bending test, the dispersion of the energy absorption value Dn under different deflection, which is the evaluation index of bending toughness, is small as well as the required number of specimen. The energy absorption value Dn under different deflection for the notched beam experimental method is more suitable for the index of flexural toughness, when evaluating concrete flexural toughness with low content hybrid fiber.关键词
混杂纤维混凝土/韧性指数/能量吸收值/方差分析/离散系数Key words
HFRC/flexural toughness indexes/energy absorption value/variance analysis/coefficient of variation分类
建筑与水利引用本文复制引用
夏冬桃,熊思慧,吴伟波,余阳..混杂纤维混凝土弯曲韧性评价体系[J].土木工程与管理学报,2017,34(2):19-24,6.基金项目
国家自然科学基金(51108164) （51108164）
