Replacing Stirrups of Self-Compacting Concrete Beams with Steel Fibers  

作　　者：尤志国 丁一宁 NIEDEREGGER Christoph 

机构地区：[1]State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology [2]Faculty of Civil Engineering, University of Innsbruck

出　　处：《Transactions of Tianjin University》2010年第6期411-416,共6页天津大学学报（英文版）

基　　金：Supported by National Natural Science Foundation of China (No. 50578026)

摘　　要：Based on the investigation of fiber influence on workability of self-compacting concrete (SCC), tests were carried out on two series of SCC rectangular simply supported beams, which were made of hooked steel fibers reinforced concrete with or without stirrups, subjected to four-point symmetrically placed vertical loads. The major test variables are steel fiber contents and stirrup ratios. The results indicate that the ultimate load significantly increases with the increase of fiber content; the addition of ...Based on the investigation of fiber influence on workability of self-compacting concrete (SCC), tests were carried out on two series of SCC rectangular simply supported beams, which were made of hooked steel fibers reinforced concrete with or without stirrups, subjected to four-point symmetrically placed vertical loads. The major test variables are steel fiber contents and stirrup ratios. The results indicate that the ultimate load significantly increases with the increase of fiber content; the addition of steel fibers in adequate percentage can change the failure mode from a brittle shear collapse into a ductile flexural mechanism. The stirrups can be partially replaced by steel fibers. The combination of stirrups and steel fibers demonstrated a positive hybrid effect on the mechanical behavior.

关 键 词：steel fiber self-compacting concrete BEAM ultimate shear strength failure mode WORKABILITY 

分 类 号：TU375[建筑科学—结构工程]