Open AccessFailure Mode Prediction for One-Way Reinforced Concrete Flat Slabs with Rectangular Columns
Author(s) -
Dênio Ramam Carvalho de Oliveira,
Lins Sandro Damsceno
Publication year - 2016
Publication title -
revista sul-americana de engenharia estrutural
Language(s) - English
Resource type - Journals
eISSN - 2316-2457
pISSN - 1806-3985
DOI - 10.5335/rsee.v12i2.1827
Subject(s) - structural engineering , slab , punching , failure mode and effects analysis , reinforcement , reinforced concrete , column (typography) , mode (computer interface) , shear (geology) , yield (engineering) , materials science , engineering , computer science , connection (principal bundle) , composite material , operating system
Flat slabs are reinforced concrete plates directly supported on columns, without intermediary beams. This structural system has been sufficiently used in the last decade, mainly for successful reach large spans and allowing "layouts" flexible. On the other hand, these slabs can be characterized as two-ways or one-ways, depending on the loading conditions, it is still stand out that NBR 6118 does not distinguish the types of flat slabs and make no reference to how much the punching resistance in the case of the one-ways flat slabs and it is known that normally these flat slabs presents low failure loads compared to the two-ways one. In this work presents a proposal, completely detailed in Damasceno’s master thesis (2007), for forecast the failure mode of one-way flat slabs with rectangular columns and without shear reinforcement, based on the prescriptions of CEB-FIP MC90 and on the Yield Line Theory. Equations that describe the behavior of the slabs in the limit between punching shear and flexure failures, considering the material’s properties, dimensions of the flat slab and the column’s cross sections, rate of flexure reinforcement in two directions, etc. are presented, parameters that influence on the slabs’ behavior. The estimates had been satisfactory and able to forecast one-way flat slabs’ failure modes.