Experimental study of hybrid FRP reinforced concrete beams
Experimental study of hybrid FRP reinforced concrete beams
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DOI：
10.1016/j.engstruct.2010.08.028
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发表时间：
2010-12-01
影响因子：
5.5
通讯作者：
Pam, Hoat Joen
中科院分区：
文献类型：
--
作者：
Lau, Denvid;Pam, Hoat Joen
纤维增强聚合物（FRP）已成为一种实用的替代建筑材料，用于替代混凝土结构中的钢筋作为增强材料。然而，FRP的脆性极大地降低了FRP增强混凝土（FRPRC）梁的延性。为了提高其弯曲延性，同时保留FRP筋的高强度特性，建议添加纵向钢筋以形成混合FRPRC梁。制作并测试了12个试件，包括素混凝土梁、钢筋混凝土（SRC）梁、纯FRPRC梁和混合FRPRC梁。试验结果表明，与纯FRPRC梁相比，混合FRPRC梁表现出更好的延性。此外，还观察到梁试件中较高程度的超配筋会使FRPRC梁具有更好的延性。因此，添加钢筋可以提高FRPRC构件的弯曲延性，并且在FRPRC构件设计中，超配筋是一种优选的方法。（C）2010爱思唯尔有限公司。保留所有权利。
Fiber-reinforced polymer (FRP) has become a practical alternative construction material for replacing steel bars as reinforcement in concrete structures. However, the brittleness of FRP greatly reduces the ductility of FRP-reinforced concrete (FRPRC) beams. In order to improve its flexural ductility, and at the same time retain the high strength feature of the FRP bars, it is proposed that steel longitudinal reinforcement should be added to form a hybrid FRPRC beam. Twelve specimens consisting of plain concrete beams, steel-reinforced concrete (SRC) beams, pure FRPRC beams and hybrid FRPRC beams were fabricated and tested. The test results show the hybrid FRPRC beams behave in a more ductile manner when compared with the pure FRPRC beams. Also, it is observed that a higher degree of over-reinforcement in the beam specimen resulted in a more ductile FRPRC beams. Hence, the addition of steel reinforcement can improve the flexural ductility of FRPRC members, and over-reinforcement is a preferred approach in the design of FRPRC members. (C) 2010 Elsevier Ltd. All rights reserved.