Effect of Beam Depth on Shear Behavior of FRP RC Beams

被引：21
|
作者：
Cholostiakow, S. [1 ]
Di Benedetti, M. [2 ]
Pilakoutas, K. [3 ]
Guadagnini, M. [1 ]
机构：
[1] Univ Sheffield, Dept Civil & Struct Engn, Sir Frederick Mappin Bldg,Mappin St, Sheffield S1 3JD, S Yorkshire, England
[2] Univ Sheffield, Multidisciplinary Engn Educ, 32 Leavygreave Rd, Sheffield S3 7RD, S Yorkshire, England
[3] Univ Sheffield, Dept Civil & Struct Engn, Construct Innovat, Sir Frederick Mappin Bldg,Mappin St, Sheffield S1 3JD, S Yorkshire, England
来源：
JOURNAL OF COMPOSITES FOR CONSTRUCTION | 2019年 / 23卷 / 01期
关键词：
Fiber-reinforced polymer (FRP); RC beams; Shear strength; Size effect; Cracking; Shear strain; Experimental study; Diagonal tension failure; Shear resisting mechanism; REINFORCED-CONCRETE BEAMS; STRENGTH; POLYMER; MEMBERS; DESIGN; PERFORMANCE; RESISTANCE;
D O I：
10.1061/(ASCE)CC.1943-5614.0000914
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The behavior of shear critical fiber-reinforced-polymer (FRP) RC elements is characterized by the development of comparatively large strains and crack widths, which can be strongly influenced by their relative geometrical size. This paper investigates experimentally the size effect on the shear behavior of FRP RC beams with and without shear reinforcement and with overall depth varying from 260 to 460mm. The results confirm a considerable size effect for members without shear reinforcement, with an average reduction in normalized shear strength of about 19% and a maximum value up to 40%. It is also shown that current design provisions are overall conservative, but with nonuniform margins of safety that decrease with increasing member depth. It is anticipated that the results of this study will help improve the efficiency of future design equations for the shear strength of FRP RC.
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页数：13
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