scholarly journals STUDY ON UPPER LIMITATION OF STEEL STRENGTH UTILIZABLE FOR REINFORCED CONCRETE MEMBERS : Part 3-Upper limitation of steel strength limited by flexural ductility of cross section and shear failure on R. C. column

1978 ◽  
Vol 265 (0) ◽  
pp. 19-31
Author(s):  
REIJI TANAKA
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Shear Failure ◽  
Concrete Members ◽  
Steel Strength ◽  
Flexural Ductility

FLEXURAL DUCTILITY OF STRUCTURAL CONCRETE MEMBERS SUBJECTED TO LIMITED CYCLES OF REPEATED LOADING

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Nazar Oukaili ◽  
Mohammed Khattab
Keyword(s):  
Reinforced Concrete ◽  
Prestressed Concrete ◽  
Concrete Beams ◽  
Constant Load ◽  
Reinforced Concrete Beams ◽  
Repeated Loading ◽  
Structural Concrete ◽  
Concrete Members ◽  
Flexural Ductility ◽  
High Level

For structural concrete members that may expose to serious earthquake, overload or accident impact, the design of ductility must be given the same importance as the flexural strength. The aim of this investigation is to study the change in ductility of structural concrete flexural members during their exposure to limited cycles of repeated loading. Twenty full-scale beam specimens have been fabricated in to two identical groups; each group consisted of ten specimens. The first group was tested under monotonic static loading to failure and regarded as control beams, while the specimens of the second group were subjected to ten cycles of repeated loading with constant load interval, which ranged between 40% and 60% of ultimate load. Specimens in each group were categorized as follows: two traditional reinforced concrete specimens with different intensity of tension reinforcement; three partially prestressed specimens with bonded strands; three partially prestressed specimens with unbonded strands; and two fully prestressed concrete specimens. The main variable, which was considered for all specimens was the partial prestressing ratio (PPR). It was observed that, the ductility of reinforced concrete beams was insignificantly increased during subjecting to limited repeated loading. For fully prestressed and partially prestressed concrete beams with high level of PPR, the ductility was significantly enhanced, while, it was decreased for specimens with small level of PPR.

scholarly journals ON THE MECHANISM OF SHEAR FAILURE OF REINFORCED CONCRETE MEMBERS

1972 ◽  
Vol 200 (0) ◽  
pp. 35-44,104
Author(s):  
TAKASHIGE HATTORI ◽  
TAKUJI SHIBATA ◽  
KAZUO OHNO
Keyword(s):  
Reinforced Concrete ◽  
Shear Failure ◽  
Concrete Members

Shear strength of heavily reinforced concrete members with circular cross section

2010 ◽  
Vol 32 (3) ◽  
pp. 617-626 ◽  
Author(s):  
Uffe G. Jensen ◽  
Linh C. Hoang ◽  
Henrik B. Joergensen ◽  
Lars S. Fabrin
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Cross Section ◽  
Circular Cross Section ◽  
Concrete Members

The Calculation of Flexural Capacity of Reinforced Concrete T-Section Beam under the Influence of Fire

2013 ◽  
Vol 351-352 ◽  
pp. 315-318
Author(s):  
Min Su ◽  
Hao Jun Gong
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Residual Strength ◽  
Flexural Capacity ◽  
Steel Strength ◽  
The Impact

According to the reduction of concrete and steel strength under the impact of fire, this paper studies the flexural capacity of concrete T-section beam after fire. Through meshing cross section, the residual strength of each unit material can be obtained from the respective temperature. Then find a matrix for the discrete numerical values and summarizes equations of flexural capacity at mid-span and support after fire respectively.

scholarly journals Shear failure in reinforced concrete members without transverse reinforcement: analysis of model error of NBR6118:2014

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Vinicius Paes de Barros ◽  
André Teófilo Beck ◽  
Túlio Nogueira Bittencout
Keyword(s):  
Shear Strength ◽  
Reinforced Concrete ◽  
Cross Section ◽  
Linear Regression Analysis ◽  
Model Error ◽  
Reinforcement Rate ◽  
Longitudinal Reinforcement ◽  
Model Errors ◽  
Concrete Members ◽  
Normative Models

Abstract This article presents an analysis of NBR6118:2014 models used to determine the one-way shear strength in reinforced concrete members without transversal reinforcement. The study compares model predictions with 751 experimental results, taken from the 2015 ACI-DAfStb database and from Quach. Model errors are quantified. Mean values observed are around unity, indicating models with no bias, but coefficients of variation are large. Model error trends are identified with respect to cross-section depth and longitudinal reinforcement rate. In elements with low rate of longitudinal reinforcement and/or large cross-section depths, the normative models provide results with low safety. This shows the need for revision of the normative models. By means of non-linear regression analysis, two correction terms are proposed to consider the longitudinal reinforcement rate and the size effect (decrease in shear strength with increase in section depth). With the proposed corrections, the observed trends are eliminated, and the design equation becomes more accurate with respect to cross-section shear.

scholarly journals Experimental analysis of T-beam reinforced concrete with holes

2018 ◽  
Vol 195 ◽  
pp. 02006
Author(s):  
Hotma Panggabean ◽  
Nicxson Pakpahan
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Shear Failure ◽  
Power Lines ◽  
Failure Model ◽  
Air Conditioners ◽  
Collapse Model ◽  
Shear Area ◽  
T Beam ◽  
Test Objects

The construction of lanes for the installation of reinforced concrete structures using holes are used for multi-storey buildings, which is required for utility networks such as power lines, piping, telephone cables, air conditioners, etc. The utility networks are usually sited in the space above the ceiling or attached by installation to the beam. Consequently, it can be reduced by the height of the rooms in the buildings and as well as debauched aesthetically. An alternative design is needed, and one of which would be implemented by utilizing spaces on the beam structures. In this research, we used an experimental method by performing analytical calculations initially, then the results from the laboratory were checked for collapse model on the test object I, which is a flexural collapse model. The collapse model on Test objects II and III was a shear failure model. Further, the test specimen III of 3-hollow T-beam cross section was feeblest from the other cross-section, with the type of shear failure occurring on the holes of the maximum shear area.

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