An experimental study on delamination of FRP plates bonded to concrete
An experimental study on delamination of FRP plates bonded to concrete
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DOI：
10.1016/j.conbuildmat.2007.04.009
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发表时间：
2008-07-01
影响因子：
7.4
通讯作者：
Ferracuti, B.
中科院分区：
文献类型：
--
作者：
Mazzotti, C.;Savoia, M.;Ferracuti, B.
FRP混凝土分层的实验活动的结果。已测试了具有不同粘结长度和板宽度的试样。沿FRP板沿着的应变计已被用于测量纵向应变。对于较长的粘结长度，遵循沿试样沿着的渐进剥离。从实验数据出发，计算了平均剪应力-滑移数据。通过后处理这些数据，两个不同的板宽度的非线性界面的法律已被校准。最大剪应力随板宽的减小而增大，而板宽对断裂能和脱层力的影响不显著。采用数值粘结滑移模型和上述非线性规律对FRP-混凝土界面进行了试验模拟。在低和很高的负载水平下，数值结果与实验结果吻合良好。(C)2007爱思唯尔有限公司保留所有权利。
Results of an experimental campaign on FRP-concrete delamination are presented. Specimens with different bonded lengths and plate widths have been tested. Strain gauges along the FRP plate have been used to measure longitudinal strains. For long bonded lengths, progressive debonding along the specimens has been followed. Starting from experimental data, average shear stress-slips data have been computed. By post-processing these data, non-linear interface laws for two different plate widths have been calibrated. Increase of maximum shear stress with decreasing plate width has been observed, whereas no significant plate width effect on fracture energy and delamination force has been found. Experimental tests have been simulated by adopting a numerical bond-slip model and the above mentioned non-linear law for the FRP-concrete interface. Numerical results in good agreement with experimental results have been obtained, both at low and very high loading levels. (C) 2007 Elsevier Ltd. All rights reserved.