Scale effects in FRC and HPFRCC structural elements

Title: Scale effects in FRC and HPFRCC structural elements
Author(s): H. Stang
Paper category : conference
Book title: International Workshop High Performance Fiber Reinforced Cement Composites
Editor(s): A. E. Naaman and H. W. Reinhardt
Print-ISBN: 2-912143-38-1
e-ISBN: 2912143799
Publisher: RILEM Publications SARL
Publication year: 2003
Pages: 245 - 258
Total Pages: 14
Nb references: 19
Language: English

Abstract: So-called high performance mechanical behavior of fiber reinforced cementitious composites, is usually associated with the ability of the material to produce multiple cracking under increasing load, when loaded in uni-axial tension. This behavior is also referred to as pseudo strain hardening. Sometimes also the ability of the material to produce multiple cracking when loaded in bending under increasing moment is associated with the term high performance or pseudo strain hardening. In the present paper it is discussed - on a theoretical, mechanical basis - why multiple cracking under uni-axial tension is a more conservative requirement than the occurrence of multiple cracking under bending. Further, it is demonstrated how significant scale effects can occur in structural elements, if the FRC-material exhibits high performance behavior in bending only. This is particularly relevant in thin-walled elements, where the occurrence of scale effects may depend on the loading mode, i.e. thin walled pipe in beam bending or ring crushing load configuration. Finally, sources of observed scale effects in structural elements made from materials exhibiting multiple cracking and strain hardening also in direct tension are discussed.

Online publication: 2003-04-28
Publication type : full_text
Public price (Euros): 0.00