Open AccessShear strength enhancement of reinforced self-compacting concrete box T-beams with different walled webs thickness using CFRP strips
Author(s) -
Ali Hameed Aziz,
Mutaz Kahdom Madhloom,
Muhammad Ali Jasem
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/737/1/012029
Subject(s) - materials science , strips , structural engineering , finite element method , parametric statistics , ultimate load , compressive strength , composite material , beam (structure) , shear (geology) , engineering , statistics , mathematics
This paper deals with the effect of walled webs thickness variation and strengthening by CFRP strips on structural performance of reinforced self-compacting concrete (SCC) box T-beams subjected to shear loads. Eight reinforced SCC beam specimens have a dimension of (1500×200×300mm) for length; width and height, respectively were poured and tested. Three variables were adopted in the present study, section type (box or solid), web thickness (50mm, 62.5mm, 75mm, and 200mm) and with or without strengthening by CFRP. Experimental results show that the increase of the wall web thickness leads to increase the ultimate strength by about (17%-38%); while the strengthening of beams using CFRP strips led to increasing in ultimate capacity by about (75%-111%). All tested beams were analyzed by finite element method using ANSYS software. Also, a parametric study was performed based on two variables, concrete compressive strength, and the strengthening by prestressing forces. It was observed there is a simulation between the finite element analysis and the experimental results of about (102%) for ultimate capacity. Also, the increase of concrete compressive strength to (50MPa) leads to increase in ultimate load capacity about (11-17%), while the ultimate capacity increased for about (78-82%) when the beams were prestressed.