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Experimental investigations on the influence of the slab width and the moment-shear-ratio on the shear capacity of RC slabs without shear reinforcement
Publikationstyp
Journal Article
Date Issued
2018
Sprache
English
Author(s)
Journal
Volume
93
Issue
1
Start Page
37
End Page
45
Citation
Bauingenieur 93 (1): 37-45 (2018)
Scopus ID
Publisher
Springer-VDI
Despite decades of research regarding shear in reinforced concrete, there is still no conclusive answer to the question of realistically quantifying shear capacity. Current code provisions distinguish between members with and without shear reinforcement. While beams must be provided with minimum shear reinforcement, it is allowed to realise slabs without. However, the semi-empirical shear design approach according to EC 2 for components without shear reinforcement was deduced from a database that comprises tests on beam-shaped specimen that were primarily tested as simple beams. A possible increase in shear capacity due to large widths is therefore not considered. Other influences on shear, e.g. resulting from support conditions that differ from the ones of a simple beam, are not taken into account in shear design. That is why tests on slabs loaded alongside their entire width and reference beams were conducted in order to investigate the influence of slab action. Some tests were conducted as continuous beams in order to investigate the influence of varying moment-shear-ratios (shear slendernesses). Therefore, the point of contra flexure was gradually shifted from one test to another, simulating different distances between a load and an intermediate support in order to quantify the increase in shear capacity due to small shear slendernesses.
DDC Class
600: Technology
620.1: Engineering Mechanics and Materials Science
690: Building, Construction