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首页> 外文期刊>Composite Structures >Dynamic response of RC beams - in different scale - with near surface mounted CFRP rectangular rods
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Dynamic response of RC beams - in different scale - with near surface mounted CFRP rectangular rods

机译：装有近表面CFRP矩形杆的RC梁在不同尺度下的动态响应。

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This paper deals with the experimental and theoretical analysis of concrete beams in different scale, under free vibration. Four beams were tested: two beams were reinforced with steel bars and two with steel bars and near surface mounted (NSM) carbon fiber reinforced polymer (CFRP) rectangular rods. All beams were subjected to static tests at different levels of bending loading to create increasing damage degrees before free vibration tests. Envelope of frequency response functions (FRFs) obtained by dynamic testing are shown and the changes of natural frequency values are related to the damage degree of RC beams with or without NSM CFRP rectangular rods. Theoretical frequency values are compared with those obtained by experimental tests and finite element analysis. The availability of the theoretical model for beam specimens in different scale is herein discussed on the basis of the data collected, comparing frequency values for undamaged and damaged elements obtained by dynamic tests with condition of free free edges. (C) 2015 Elsevier Ltd. All rights reserved.
机译：本文研究了在自由振动下不同比例的混凝土梁的试验和理论分析。测试了四根梁：两根梁用钢筋加固，另两根用钢筋和近表面安装（NSM）碳纤维增强聚合物（CFRP）矩形棒加固。在进行自由振动测试之前，所有梁都要在不同水平的弯曲载荷下进行静态测试，以增加破坏程度。显示了通过动态测试获得的频率响应函数（FRF）的包络，并且固有频率值的变化与带有或不带有NSM CFRP矩形杆的RC梁的损伤程度有关。将理论频率值与通过实验测试和有限元分析获得的理论频率值进行比较。本文在收集数据的基础上讨论了不同规模的梁样品的理论模型的可用性，将通过动态测试获得的未损坏和受损元件的频率值与自由边缘条件进行了比较。 （C）2015 Elsevier Ltd.保留所有权利。

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