scholarly journals A Design Chart for Optimum Dimensions of Reinforced Concrete Cantilever Beams

2021 ◽  
Vol 1094 (1) ◽  
pp. 012023
Author(s):  
Abdel Kareem M Al-Shammaa ◽  
Sohaib K Al-Mamoori
Keyword(s):  
Reinforced Concrete ◽  
Cantilever Beams ◽  
Design Chart

Experimental identification of exponential damping for reinforced concrete cantilever beams

2019 ◽  
Vol 186 ◽  
pp. 161-169 ◽  
Author(s):  
Li Su ◽  
Sheng-Qi Mei ◽  
Yu-Hua Pan ◽  
Yuan-Feng Wang
Keyword(s):  
Reinforced Concrete ◽  
Cantilever Beams ◽  
Experimental Identification

Artificial neural network model for deflection analysis of superelastic shape memory alloy reinforced concrete beams

2010 ◽  
Vol 37 (6) ◽  
pp. 855-865 ◽  
Author(s):  
Y. I. Elbahy ◽  
M. Nehdi ◽  
M. A. Youssef
Keyword(s):  
Reinforced Concrete ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Companion Paper ◽  
Reduction Factor ◽  
Moment Of Inertia ◽  
Reinforced Concrete Beams ◽  
Rc Beams ◽  
Design Chart ◽  
Artificial Neural

The need for a new model capable of accurately predicting the deflection of shape memory alloy (SMA) reinforced concrete (RC) beams is clear from the results obtained in the companion paper. In the present paper, artificial neural networks (ANNs) are utilized to develop such a model. The objective is to create a design tool for computing a reduction factor β to be used in the calculation of the effective moment of inertia for SMA RC beams. First, a database was developed using the results obtained from the parametric study reported in the companion paper. The main factors affecting the moment of inertia have been considered. The network architecture that results in the optimum performance was selected and trained. After demonstrating the network’s ability to predict output data for unfamiliar input data, the network was used to develop a design chart that provides the reduction factor β as a function of the reinforcement ratio and the reinforcement modulus of elasticity. A design example is discussed to illustrate the advantages of using the developed design chart over existing models.

scholarly journals The Effect of Changing Stirrup Spacing and Hook Angle on RC Cantilever Beams with Industrial Iron Chips Waste

2021 ◽  
Author(s):  
MUHAMMET ZEKİ ÖZYURT ◽  
Ömer Fatih Sancak
Keyword(s):  
Reinforced Concrete ◽  
The Other ◽  
Experimental Setup ◽  
Cantilever Beams ◽  
Loading Process ◽  
End Point ◽  
Side Load ◽  
Load Displacement ◽  
Strength And Ductility

Abstract In this study, the usability of industrial iron chips waste was investigated in order to provide recycling in the production of reinforced concrete cantilever beams with different stirrup spacing and hook angle. In the concrete produced for cantilever beams, aggregates not larger than 4 mm in diameter were reduced by 20% and replaced with iron chips waste. Cantilever beams are manufactured with stirrup spaces of 50, 100 and 150 mm. The hook angles of the stirrups are differentiated to be 90 and 135 degrees. The experimental setup was prepared in such a way that one side of the samples was fixed, and the other side was free. The loading process was done from the end point of the released side. Load-Displacement curves of cantilever beams were obtained. In the research, it was observed that although 20% iron chips added cantilever beams experienced a decrease in their strength compared to the reference beams, they increased their ductility values at all three different stirrup spaces. As the stirrup spacing widened, the ductility values decreased. However, the effect of iron chips additive on ductility has increased. Samples with stirrup hook angle of 135 degrees increased both strength and ductility values compared to samples with 90 degrees.

scholarly journals Modelling of Bonded Post-Tensioned Concrete Cantilever Beams under Flexural Loading

2017 ◽  
Vol 3 (7) ◽  
pp. 463-479
Author(s):  
Abbas Mohammed ◽  
Khattab Saleem Abdul-Razzaq ◽  
Nildem Tayşi ◽  
Awat FAQE
Keyword(s):  
Reinforced Concrete ◽  
Three Dimensional ◽  
Offshore Structures ◽  
Cantilever Beams ◽  
Fe Method ◽  
Flexural Strengthening ◽  
Long Span ◽  
Small Depth ◽  
Package Program ◽  
Post Tensioned

Prestressing is widely used technic all over the world for constructions of buildings, bridges, towers, offshore structures etc. due to its efficiency and economy for achieving requirements of long span with small depth. It is used for flexural strengthening of reinforced concrete structures for improving cracking loads and decreasing deflections due to service loads. There are two methods for prestressing (pre-tensioning and post-tensioning). In this paper, a three-dimensional nonlinear Finite Element (FE) method is used to determine the behaviour of Post-Tensioned (PT) concrete cantilever beams with different tendon profiles. Numerical analyses ANSYS package program is used for analysis of beams. The results from FE analysis is verified by experimental reference test result and good agreement is achieved. This paper is focused on the effect of different tendon profiles on the flexural behaviour of Bonded Post Tensioned (BPT) reinforced concrete cantilever beams. Six models with different tendon profiles are investigated. These models are without tendons, two tendons at the bottom, middle, top, parabolic tendons with one draped point and two draped points. Failure loads, deflections, and load versus deflection relationships for all models are examined and it is seen that the beam with one draped tendon profile shows a highest performance.

scholarly journals DAMAGE OF HIGH-STRENGTH REINFORCED CONCRETE COLUMNS UNDER HORIZONTAL AND VERTICAL LOADING

2003 ◽  
Vol 9 (3) ◽  
pp. 163-171
Author(s):  
Rogerio Bairrăo ◽  
Rimantas Kačianauskas ◽  
Romualdas Kliukas
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
High Strength ◽  
Concrete Columns ◽  
Shaking Table ◽  
Cantilever Beams ◽  
Concentrated Force ◽  
Reinforced Concrete Columns ◽  
Vertical Loading ◽  
Horizontal Displacements

The global damage of the high-strength reinforced concrete columns is investigated experimentally. Two identical specimens with annular cross-section and spiral containment were designed and two tests up to failure for the both specimens were carried out at the LNEC shaking table facilities. The columns worked as plane cantilever beams under the action of the constant vertical concentrated force and time-dependent concentrated horizontal force. The global damage concept is based on stiffness degradation. A variation of the observed horizontal displacements and forces during experiments as well as evolution of damage are presented and considered in details. The results show that increase of loading values is dominating factor of the global damage.

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