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68. Numerical modelling of full scale prestressed fiber-reinforced concrete thin webbed open section roof elements



Title: 68. Numerical modelling of full scale prestressed fiber-reinforced concrete thin webbed open section roof elements
Author(s): L. Cominoli, F. Minelli, P. Riva
Paper category : conference
Book title: 6th International RILEM Symposium on Fibre Reinforced Concretes
Editor(s): M. di Prisco, R. Felicetti and G.A. Plizzari
Print-ISBN: 2-912143-51-9
e-ISBN: 2912143748
Publisher: RILEM Publications SARL
Publication year: 2004
Pages: 787 - 798
Total Pages: 12
Nb references: 12
Language: English


Abstract: Steel fibers have been shown to provide adequate ductility and strength in several structural applications, one above all in substituting the minimum code required shear reinforcement of beams, particularly if made of precast high performance concrete. The following research investigates the effectiveness of fibers in replacing the secondary reinforcement in thin webbed precast elements, which are nowadays mainly utilized as roof elements. Based on experiments carried out at the University of Brescia on a set of three full scale roof elements, made of self compacting fiber reinforced high performance concrete, numerical analyses were performed in order to model the fiber effect on the global structural behavior, which, in terms of greater ductility, crack control and lower transverse effects, benefited of the presence of fibrous randomly distributed reinforcement. Analyses were performed using a smeared crack damage model provided by the latest release of ABAQUS (V. 6.4). The numerical results turned out to be in close agreement with the experiments, particularly with respect to the first cracking point, the initial crack pattern, and its development. A discussion on the FE program merits is also presented.


Online publication: 2004-08-30
Publication type : full_text
Public price (Euros): 0.00