Strengthening of Fired RC Beam Column Joint using Geosynthetics

From the past few decades, there has been a steady growth in the field of construction of building all over the globe. With the technological advances on all fronts the complexity of fires, explosions and the hazards are major challenge thrown up to the planner, engineer and architects. Hence, new techniques and sustainability material have to be adapted for the retrofitting of fire damaged buildings. Notable work has been done with Glass Fibre Reinforced Polymers (GFRP), Carbon Fibre Reinforced Polymers (CFRP) and Basalt Fibre Reinforced Polymer (BFRP) as a fibre reinforced polymers used as a retrofitting material. But less work has been done with geosynthetics material (Gotextiles. Geogrids, Geonets, Geomembranes) . The main purpose of this research study is to evaluate the behaviour of fired RC beam-column joint specimens wrapped with Geogrid and Glass Geocomposite. In the process, 12 beam-column joint specimens were casted out which 9 were fired at a temperature of 6000 c for 6 hours and 6 specimens were wrapped with the geosynthetics (3- wrapped with Geogrid, and 3- wrapped with glass fibre) and remaining 3 specimens were tested directly without any wrappings. Studies were performed on the control specimens and the wrapped/ retrofitted specimens for engineering properties. From the result, it has been observed that geogrid wrapped fired specimen and glass geocomposite wrapped fire specimen showed more deflection than control specimen and had higher load carrying capacity than the fired specimen without wrapping.

Download Full-text

Investigation into fibre orientation and weldline reduction of injection moulded short glass-fibre/polyamide 6-6 automotive components

Journal of Thermoplastic Composite Materials ◽

10.1177/0892705719833098 ◽

2019 ◽

Vol 33 (12) ◽

pp. 1603-1628

Author(s):

Sarah Mosey ◽

Feras Korkees ◽

Andrew Rees ◽

Gethin Llewelyn

Keyword(s):

Glass Fibre ◽

Fibre Orientation ◽

Weight Ratio ◽

Polyamide 6 ◽

Processing Parameters ◽

Material Strength ◽

Reinforced Polymers ◽

Automotive Components ◽

Glass Fibre Reinforced ◽

Component Failures

Due to the increasing demands on automotive components, manufacturers are relying on injection moulding components from fibre-reinforced polymers in an attempt to increase strength to weight ratio. The use of reinforcing fibres in injection moulded components has led to component failures whereby the material strength is hampered through the formation of weldlines which are also a problem for unreinforced plastics. In this study, an industrial demonstrator component has the injection locations verified through a combination of fibre orientation tensor simulation and optical microscopy analysis of key locations on the component. Furthermore, the automotive component manufactured from 30% glass fibre–reinforced polyamide 6-6 is simulated and optimized through a Taguchi parametric study. A comparison is made between the component, as it is currently manufactured, and the optimum processing parameters determined by the study. It was found that the component can be manufactured with roughly 7.5% fewer weldlines and with a mould fill time 132 ms quicker than the current manufacturing process.

Download Full-text

Porosity Determination of Carbon and Glass Fibre Reinforced Polymers Using Phase-Contrast Imaging

Journal of Nondestructive Evaluation ◽

10.1007/s10921-018-0529-6 ◽

2018 ◽

Vol 38 (1) ◽

Cited By ~ 5

Author(s):

Christian Gusenbauer ◽

Michael Reiter ◽

Bernhard Plank ◽

Dietmar Salaberger ◽

Sascha Senck ◽

...

Keyword(s):

Glass Fibre ◽

Phase Contrast ◽

Phase Contrast Imaging ◽

Contrast Imaging ◽

Reinforced Polymers ◽

Glass Fibre Reinforced

Download Full-text

Seismic Retrofitting of Unreinforced Brick Masonry Panels with Glass Fibre Reinforced Polymers

International Journal of Geotechnical Earthquake Engineering ◽

10.4018/ijgee.2017010102 ◽

2017 ◽

Vol 8 (1) ◽

pp. 28-37 ◽

Cited By ~ 3

Author(s):

Radhikesh Prasad Nanda ◽

Hasim Ali Khan ◽

Apurba Pal

Keyword(s):

Flexural Strength ◽

Glass Fibre ◽

Bending Moment ◽

Brick Masonry ◽

Seismic Retrofitting ◽

Loading Test ◽

Reinforced Polymers ◽

Geometric Configurations ◽

Out Of Plane ◽

Glass Fibre Reinforced

The out-of-plane performances of brick masonry panels with different retrofitting patterns using glass fibre reinforced polymers (GFRP) have been studied under three-point loading test. The panels were retrofitted on one side and both sides with different geometric configurations. The retrofitted specimens increased the failure load from 19.6 kN (UR) to 79.2 kN. It was observed that the flexural strength of the retrofitted patterns increased from 31.58% to 150% when compared to un-retrofitted specimens. Also, the bending moment of the retrofitted panels increased from 5.94 kNm to 8.96 kNm when retrofitted with one side, while it goes up to 14.88 kNm when retrofitted with both side as compared to un-retrofitted specimens. Further, it also observed that the panel with cross retrofitting showed more efficiency in terms of flexural strength, bending moment, stiffness and deformation capacity.

Download Full-text

Effect of indenter size on delamination initiation in glass fibre reinforced polymers (GFRP) under transverse loading

Journal of Materials Science ◽

10.1023/b:jmsc.0000034160.36767.cc ◽

2004 ◽

Vol 39 (14) ◽

pp. 4637-4641

Author(s):

S. Yuen ◽

T. Kuboki ◽

P.-Y. B. Jar ◽

T. W. Forest ◽

J. J. R. Cheng

Keyword(s):

Glass Fibre ◽

Transverse Loading ◽

Reinforced Polymers ◽

Glass Fibre Reinforced

Download Full-text

Investigating the Unrecovered Displacement of Glass Fibre Reinforced Polymers Due to Manufacturing Conditions

Journal of Multifunctional Composites ◽

10.12783/issn.2168-4286/2.2/milani ◽

2015 ◽

Vol 2 (2) ◽

pp. 100-104 ◽

Cited By ~ 1

Author(s):

SHAH MOHAMMADI ◽

L. SOLNICKOVA ◽

B. CRAWFORD ◽

M. KOMEILI ◽

A. S. MILANI

Keyword(s):

Glass Fibre ◽

Reinforced Polymers ◽

Glass Fibre Reinforced

Download Full-text

Mechanisms of fatigue fracture in short glass fibre-reinforced polymers

Journal of Materials Science ◽

10.1007/bf01133353 ◽

1987 ◽

Vol 22 (11) ◽

pp. 4015-4030 ◽

Cited By ~ 49

Author(s):

R. W. Lang ◽

J. A. Manson ◽

R. W. Hertzberg

Keyword(s):

Fatigue Fracture ◽

Glass Fibre ◽

Reinforced Polymers ◽

Short Glass Fibre ◽

Glass Fibre Reinforced ◽

Short Glass

Download Full-text

Influence of interlaminar fracture toughness on impact resistance of glass fibre reinforced polymers

Composites Science and Technology ◽

10.1016/s0266-3538(02)00316-0 ◽

2003 ◽

Vol 63 (7) ◽

pp. 943-953 ◽

Cited By ~ 23

Author(s):

T Kuboki ◽

P.-Y.B Jar ◽

T.W Forest

Keyword(s):

Fracture Toughness ◽

Glass Fibre ◽

Impact Resistance ◽

Interlaminar Fracture Toughness ◽

Reinforced Polymers ◽

Interlaminar Fracture ◽

Glass Fibre Reinforced

Download Full-text

Effect of combined fatigue and hygrothermal loading on structural properties of E-glass/polymers

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406216644268 ◽

2016 ◽

Vol 231 (18) ◽

pp. 3382-3392 ◽

Cited By ~ 2

Author(s):

Abhineet Saini ◽

Rahul Chhibber ◽

A Chattopadhyay

Keyword(s):

Glass Fibre ◽

Volume Fraction ◽

Cyclic Fatigue ◽

Standard Test ◽

Reinforced Polymers ◽

Tropical Environments ◽

Tropical Conditions ◽

Different Temperatures ◽

Glass Fibre Reinforced ◽

Structural Tests

The paper discusses the potential ingress and combined effect of moisture and temperature on pre-fatigued glass fibre-reinforced polymers standard test specimens. An experimental investigation was conducted to analyse the behaviour of glass fibre-reinforced polymers’ in environmental conditions similar to that of tropical environments. The standard pre-fatigued glass fibre-reinforced polymers specimens were subjected to varying hygrothermal conditions: three different temperatures, i.e. natural bath, 45 ℃ and 55 ℃ to study the degradation in strength and related properties. Several macro-structural and micro-structural tests were conducted to determine the damage. The effect of these conditions on characteristics such as diffusivity, weight gain, resin volume fraction, conductivity and deterioration of ultimate tensile strength was determined. The maximum reduction in strength is found to be approximately 39% for the specimen exposed to 55 ℃ water bath for 60 days. This study shall be helpful in estimating the characteristics of glass fibre-reinforced polymers composites subjected to cyclic fatigue loads in the tropical conditions.

Download Full-text

Simplified encapsulation of solar cells using glass fibre reinforced polymers

2013 Africon ◽

10.1109/afrcon.2013.6757596 ◽

2013 ◽

Author(s):

Warren S Hurter ◽

Haydn du Plessis ◽

Nickey Janse van Rensburg

Keyword(s):

Solar Cells ◽

Glass Fibre ◽

Reinforced Polymers ◽

Glass Fibre Reinforced

Download Full-text

Experimental Study on Structural Rehabilitation of Severely Damaged I-Beams Using Fibre Reinforced Polymers

10.1115/omae2021-60938 ◽

2021 ◽

Author(s):

Jerin Mathew George ◽

Mehrdad Kimiaei ◽

Mohamed Elchalakani

Keyword(s):

Failure Modes ◽

Offshore Structures ◽

Reinforced Polymers ◽

Frp Composites ◽

Four Point Bending ◽

Repair Costs ◽

Structural Rehabilitation ◽

Carbon Fibre Reinforced Polymers ◽

Fibre Reinforced Polymer ◽

Glass Fibre Reinforced

Abstract Fixed and Floating Offshore structures commonly utilize I-beams as structural components withstanding distributed loads on their decks or inside hulls. These structural members get damaged due to the corrosive marine environment leading to a condition in which they need replacement or rehabilitation. Such situations are not desirable as it will incur monetary losses directly with replacement or repair costs and indirectly through operational losses due to shut down for hot repair works. A safe and economical alternative for structural rehabilitation of damaged I-beams is using Fibre Reinforced Polymer (FRP) composites. An experimental investigation on the feasibility of repair of a heavily damaged I-beam using two different types of FRPs is presented. The severe damage in the I-beam was artificially introduced by removing both flanges and the web for 300 mm in the mid-span of 1800 mm long I-beam. Four-point bending tests under static loads were performed until failure of the beam. The first repair was done using carbon fibre reinforced polymers (CFRPs) and the second one utilized glass fibre reinforced polymers (GFRP). The CFRP repaired specimen showed 277% improvement from the damaged state whereas the GFRP repair improved 248% in terms of the ultimate strength. A comparison of the behaviour between CFRP and GFRP repair is also highlighted in the study. Various parameters like stiffness, ductility, load-displacement behaviour and failure modes of these FRP repairs for damaged I-beams are discussed in detail. Overall, the results from the study portray the adequacy of an FRP rehabilitation to reinstate the strength from such structural damages in I-beams.

Download Full-text