Effectiveness of stirrups and steel fibres as shear reinforcement

被引:224
作者
Cucchiara, C [1 ]
La Mendola, L [1 ]
Papia, M [1 ]
机构
[1] Univ Palermo, Dipartimento Ingn Strutturale & Geotecn, I-90128 Palermo, Italy
关键词
fibre reinforced concrete beams; ultimate strengths; stirrups; steel fibres; tests;
D O I
10.1016/j.cemconcomp.2003.07.001
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
This paper presents the results of experimental tests carried out on rectangular simply supported beams made of hooked steel fibre reinforced concrete with and without stirrups, subjected to two-point symmetrically placed vertical loads. The tests, carried out with controlled displacements, allow one to record complete load-deflection curves by means of which it is possible to deduce information on dissipative capacity and ductile behaviour up to failure. Depending on the amount of transverse reinforcement, volume fraction of fibres added in the mix and shear span, the collapse mechanism is due to predominant shear or flexure, thus showing the influence of the aforementioned structural parameters on the load carrying capacity and the post-peak behaviour of the beam. In particular, the results show that the inclusion of fibres in adequate percentage can change the brittle mode of failure characterizing shear collapse into a ductile flexural mechanism, confirming the possibility of achieving analogous performance by using reinforcing fibres instead of increasing the amount of transverse reinforcement. The ultimate values of the shear stresses recorded experimentally are compared with the corresponding values deduced by semiempirical expressions available in the literature and the correlation is satisfactory. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码:777 / 786
页数:10
相关论文
共 29 条
[1]  
Adebar P, 1997, ACI STRUCT J, V94, P68
[2]  
Al-Taan S., 1990, Cem. Concr. Compos., V12, P87
[3]  
American Concrete Institute (ACI), 1963, 31863 ACI
[4]  
[Anonymous], 1988, ACI STRUCT J, V85, P563
[5]  
[Anonymous], 1984, ACI J
[6]  
ASHOUR SA, 1992, ACI STRUCT J, V89, P176
[7]  
Campione G, 1999, ADV EARTHQ ENGN, P23
[8]  
CAMPIONE G, 2000, FIBRE REINFORCED CON, P451
[9]   Diagonal shear in thin-webbed reinforced concrete beams: Fibre and stirrup roles at shear collapse [J].
diPrisco, M ;
Romero, JA .
MAGAZINE OF CONCRETE RESEARCH, 1996, 48 (174) :59-76
[10]  
ELNIEMA EL, 1991, ACI STRUCT J, V88, P178