Crack width evaluation of fiber-reinforced cementitious composite considering interaction between deformed steel rebar
Crack width evaluation of fiber-reinforced cementitious composite considering interaction between deformed steel rebar
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DOI：
10.1016/j.conbuildmat.2020.119968
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发表时间：
2020-11-20
影响因子：
7.4
通讯作者：
Kanakubo, Toshiyuki
中科院分区：
文献类型：
--
作者：
Sunaga, Daiki;Namiki, Keisuke;Kanakubo, Toshiyuki
本研究旨在提出一种简单的钢筋混凝土构件裂缝宽度评估方法。为了明确裂缝宽度的测量，对带狭缝的FRP混凝土棱柱体试件进行了单轴拉伸试验。试验参数为棱柱体截面尺寸和FRCC的纤维体积分数。通过加载试验，得到了钢筋应变与裂缝宽度的关系.考虑粘结应力-滑移关系、纤维桥接规律（桥接应力-裂缝宽度关系）和裂缝发生条件，通过求解FRCC与钢筋之间的力平衡和协调条件，导出了预测型钢FRCC裂缝宽度的理论计算公式。用该公式预测的钢材应变-裂纹宽度曲线与试验结果在各参数下具有良好的适应性。(C)2020作者（S）爱思唯尔有限公司出版
This study aims to propose a simple evaluation method of crack width in reinforced FRCC members. Uniaxial tension test is conducted for steel-reinforced FRCC prism specimens with slits to measure crack width clearly. The test parameters are cross-sectional size of prism and fiber volume fraction of FRCC. Through the loading test, steel strain - crack width relationship is obtained. The theoretical calculation formula to predict crack width in steel-reinforced FRCC is led by solving the force equilibrium and compatibility conditions between FRCC and reinforcing bar considering bond stress - slip relationship, fiber bridging law (bridging stress - crack width relationship) and condition of crack occurrence. The steel strain - crack width curves predicted by the proposed formula show a good adaptability with the experimental results in each parameter. (C) 2020 The Author(s). Published by Elsevier Ltd.