Experimental, analytical and numerical investigation of pultruded GFRP composite beams infilled with hybrid FRP reinforced concrete

2021 ◽  
Vol 244 ◽  
pp. 112790
Author(s):  
Lokman Gemi ◽  
Emrah Madenci ◽  
Yasin Onuralp Özkılıç
Keyword(s):  
Reinforced Concrete ◽  
Numerical Investigation ◽  
Composite Beams ◽  
Gfrp Composite

scholarly journals Reliability of beams designed in accordance with Brazilian codes

2014 ◽  
Vol 7 (5) ◽  
pp. 723-746 ◽  
Author(s):  
D. M. Santos ◽  
F. R. Stucchi ◽  
A. T. Beck
Keyword(s):  
Reinforced Concrete ◽  
Concrete Beams ◽  
Composite Beams ◽  
Reinforced Concrete Beams ◽  
Steel Beams ◽  
Structural Elements ◽  
Pure Bending ◽  
Design Standards ◽  
Limit Values ◽  
Relative Safety

This paper presents an investigation on the safety of structural elements submitted to pure bending, produced in reinforced concrete, in steel and steel-concrete composites, and designed according to Brazilian codes NBR8681:2003, NBR6118:2007 and NBR8800:2008. The study allows a comparison of the relative safety of beams produced with these materials and designed using these codes. Comparative studies between the performances of different materials are difficult to find in the published literature. The present study shows that reliability indexes for reinforced concrete beams are satisfactory; however, results for steel beams are below limit values established in international design standards. Reliability indexes found herein for steel-concrete composite beams are intermediate to concrete and steel beams.

Responses of composite beams with high-performance fiber-reinforced concrete

2021 ◽  
Vol 270 ◽  
pp. 121814
Author(s):  
Duy-Liem Nguyen ◽  
Duc-Kien Thai ◽  
H.T. Tai Nguyen ◽  
Thac-Quang Nguyen ◽  
Kien Le-Trung
Keyword(s):  
Reinforced Concrete ◽  
High Performance ◽  
Composite Beams ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
High Performance Fiber

scholarly journals A numerical investigation of the cracking behaviour of reinforced-concrete tie elements

2020 ◽  
Vol 72 (3) ◽  
pp. 109-121 ◽  
Author(s):  
Reignard Tan ◽  
Max A. N. Hendriks ◽  
Mette Geiker ◽  
Terje Kanstad
Keyword(s):  
Reinforced Concrete ◽  
Numerical Investigation

The effect of dome properties on design of the axial symmetric cylindrical wall

2021 ◽  
Vol 7 (1) ◽  
pp. 11
Author(s):  
Aylin Ece Kayabekir
Keyword(s):  
Reinforced Concrete ◽  
Computer Program ◽  
Numerical Investigation ◽  
Computer Software ◽  
General Purpose ◽  
Design Stage ◽  
Cylindrical Wall ◽  
Support Condition ◽  
Structural Concrete ◽  
Analysis And Design

The usage of computer software in civil engineering has expanded in last decades. Many general-purpose and special-purpose commercial programs perform a very important function, especially at the design stage. In this study, a computer program is introduced for the analysis and design of the axial symmetric cylindrical wall considering the dome effects. Analysis processes are carried out according to Flexibility theory with long wall assumption and during the reinforced concrete (RC) design of the wall, ACI 318-Building code requirements for structural concrete are considered. In numerical investigation, the effects of the dome properties (thickness and height) on the analysis and design of the wall are investigated by performing a totally 72 case analyzes. These cases include different support condition at bottom of the wall, wall heights, dome thicknesses and heights. According to analysis results, it is concluded that effects of dome thickness and heights on the wall on the wall are very limited.

scholarly journals Research on the Efficiency of Composite Beam Application in Multi-Storey Buildings

2020 ◽  
Vol 12 (20) ◽  
pp. 8328 ◽  
Author(s):  
Tomas Kinderis ◽  
Mindaugas Daukšys ◽  
Jūratė Mockienė
Keyword(s):  
Reinforced Concrete ◽  
Fire Resistance ◽  
Composite Beam ◽  
Concrete Beams ◽  
Residential Building ◽  
Reinforced Concrete Beam ◽  
Composite Beams ◽  
Reinforced Concrete Beams ◽  
Assessment Criteria ◽  
Floor Structure

Over the past decade, several types of composite slim floor constructions have been used in multi-storey buildings in Lithuania. In order to study the efficiency of composite beam application in steel-framed multi-storey buildings, Thorbeam (A1), Deltabeam (A2), slim floor beam (A3) and asymmetric slim floor beam (A4) were chosen and evaluated according to nine assessment criteria (beam cost (K1), initial preparation on site (K2), installation time (K3), complexity of installation technology (K4), labour costs (K5), fire resistance (K6), load bearing capacity (K7), beam versatility (K8), and availability of beams (K9)). First, the significance of the rating criteria was selected and the order of the ranking criteria was obtained (K1˃K7˃K3˃K6˃K4˃K5˃K2˃K8˃K9) by means of a survey questionnaire. Second, the beams were ranked according to the points given by the questionnaire respondents as follows: 160 points were given to A2, 144 points to A1, 129 points to A4, and 111 points to A3. Deltabeam is considered to be the most rational alternative of the four beams compared. Calculations done using the Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) analysis method revealed that composite beam A2 was the best slim floor structure alternative for an eight-storey high-rise commercial residential building frame, A1 ranked second, A4 ranked third, and A3 ranked fourth. In addition, the four composite beams were compared to a reinforced concrete beam (A5) according to three assessment criteria (beam cost including installation (C1), beam self-weight (C2) and fire resistance (C3)). Deltabeam was found to be efficient for use as a slim floor structure in a multi-story building due to having the lowest cost, including installation, and self-weight, and the highest fire resistance compared to other composite beams studied. Although Deltabeams are 1.4 times more expensive than reinforced concrete beams, including installation costs, they save about 2.5% of the building’s height compared to reinforced concrete beams.

3D Finite Element Modeling of GFRP-Reinforced Concrete Deep Beams without Shear Reinforcement

2017 ◽  
Vol 15 (02) ◽  
pp. 1850001 ◽  
Author(s):  
George Markou ◽  
Mohammad AlHamaydeh
Keyword(s):  
Reinforced Concrete ◽  
Mechanical Behavior ◽  
Numerical Investigation ◽  
Numerical Models ◽  
Design Guidelines ◽  
Design Parameters ◽  
Shear Reinforcement ◽  
Deep Beams ◽  
Modes Of Failure ◽  
Hexahedral Elements

This paper presents the numerical investigation of nine Glass Fiber-Reinforced Polymer (GFRP) concrete deep beams through the use of numerically-efficient 20-noded hexahedral elements. Cracking is taken into account by means of the smeared crack approach and the bars are simulated as embedded rod elements. The developed numerical models are validated against published experimental results. The validation beams spanned a practical range of varying design parameters; namely, shear span-to-depth ratio, concrete specified compressive strength and flexural reinforcement ratio. The motivation for this research is to accurately yet efficiently capture the mechanical behavior of the GFRP-reinforced concrete deep beams. The presented numerical investigation demonstrated close correlations of the force–deformation relationships that are numerically predicted and their experimental counterparts. Moreover, the numerically predicted modes of failure are also found to be conformal to those observed experimentally. The proposed modeling approach that overcame previous computational limitations has further demonstrated its capability to accurately model larger and deeper beams in a computationally efficient manner. The validated modeling technique can then be efficiently used to perform extensive parametric investigations related to behavior of this type of structural members. The modeling method presented in this work paves the way for further parametric investigations of the mechanical behavior of GFRP-reinforced deep beams without shear reinforcement that will serve as the base for proposing new design guidelines. As a deeper understanding of the behavior and the effect of the design parameters is attained, more economical and safer designs will emerge.

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