Hello!

I'm a PhD student of the Civil Engineering Department and i'm trying to modulate some RC beams externally reinforced with GFRP. At this point, i allready tested one beam unreinforced. The results are pretty good however, the experimental results (p.e. Force vs displacement graph) shows concrete cracking at 9kN and the ATENA shows almost twice this value. I'm using fixed crack and i remember an article of prof. Cervenka saying that fixed crack gives minor displacement... i'm supposing that the cause may be here... it is possible? or it is something else? if it is something else, what is it?

Thank you for your attention,
Best wishes,

Hugo Biscaia
Civil Engineering Department
New University of Lisbon