Structural Performance of a Precast Beam to Column Connection Strengthened with FRP under Monotonic Loading

2018 ◽  
Vol 878 ◽  
pp. 121-125
Author(s):  
Charles K.S. Moy
Keyword(s):  
Steel Plate ◽  
Precast Concrete ◽  
High Strength ◽  
Careful Consideration ◽  
Structural Performance ◽  
Rotational Stiffness ◽  
Basalt Fibre ◽  
Reinforced Polymer ◽  
The World ◽  
Fibre Reinforced Polymer

Over the years, precast concrete construction has been employed in many parts of the world mainly because it is less labour intensive and rapid. However, its connection remains in many cases an issue that requires careful consideration at both the design and construction stages. More precisely, the ductility and rotational stiffness are often challenging factors that need to be considered. In that perspective, this work focuses on finding the improvement of a precast beam-to-column connection with strengthening from fibre reinforced polymer (FRP). High strength basalt fibre fabric was used in this particular study. The study revealed a net improvement in the connection’s rotational stiffness and ductility. It was also found that the addition of a steel plate on top of the FRP contributed to maintaining the strength of the connection under late plastic deformation.

scholarly journals Investigation on application of basalt materials as reinforcement for flexural elements of concrete bridges

2015 ◽  
Vol 10 (3) ◽  
pp. 201-206 ◽  
Author(s):  
Viktor Gribniak ◽  
Aleksandr K. Arnautov ◽  
Gintaris Kaklauskas ◽  
Vytautas Tamulenas ◽  
Edgaras Timinskas ◽  
...  
Keyword(s):  
Deformation Behaviour ◽  
High Strength ◽  
Concrete Bridges ◽  
Polymer Materials ◽  
Structural Stiffness ◽  
New Materials ◽  
Basalt Fibre ◽  
Reinforced Polymer ◽  
Polymer Sheets ◽  
Fibre Reinforced Polymer

Basalt polymers are rather new materials for civil engineering; therefore, identification of peculiarities and limitations of application of such polymers in concrete structures (particularly bridges) is of vital importance. This paper experimentally investigates deformation behaviour and cracking of flexural elements, which are predominant parameters governing serviceability of the bridges. Unlike a common practice, the present study is not limited by the analysis of concrete beams reinforced with the polymer bars; it also considers effectiveness of basalt fibre reinforced polymer sheets for repairing the beams. The analysis has revealed that a combination of the high strength and elasticity polymer materials governs the effective repair of the beams by significantly increasing (up to 40%) the structural stiffness.

scholarly journals Advances in Precast Concrete Sandwich Panels toward Energy Efficient Structural Buildings

2018 ◽  
Author(s):  
Sani Mohammed Bida ◽  
Farah Nora Aznieta Abdul Aziz ◽  
Mohd Saleh Jaafar ◽  
Farzad Hejazi ◽  
Abu Bakar Nabilah
Keyword(s):  
Energy Efficient ◽  
Precast Concrete ◽  
Sandwich Panels ◽  
Strength Loss ◽  
Insulation Layer ◽  
Basalt Fibre ◽  
Reinforced Polymer ◽  
Alternative Materials ◽  
Fibre Reinforced Polymer ◽  
Thermal Bridges

Precast concrete sandwich panels (PCSP) are energy efficient building system that is achieved through an insulation layer created between the concrete wythes. The insulation layer is usually of low bearing strength material making it more applicable for non-structural building systems. Hence, shear connectors are introduced to improve its structural capacity, which subsequently degrades it thermal performance by serving as thermal bridges across the panel. This article review researches of alternative materials and methods used to improve the thermal efficiency as well as reduced the strength loss due to insulation in PCSP. The alternative materials are basalt fibre reinforced polymer (BFRP), carbon fibre reinforced polymer (CFRP), glass fibre reinforced polymer (GFRP), and foam concrete which are selected due to their low thermal conductivity for use in shear connection. While thermal path method has been used to prevent the effect of thermal bridges. Although, some of these materials have successfully achieved the desirable behaviours, however, several undesirable properties such as brittleness, bond slip, the sudden crushing of the panel system, and FRP failure below its ultimate strength were observed. Hence, the practicality of the alternative materials is still questionable despite its higher cost compared to the conventional steel and concrete used in the PCSP system.

scholarly journals Blast responses of polyurea retrofitted utility tunnel reinforced with basalt fibre reinforced polymer bars

2021 ◽  
Author(s):  
Jian-nan Zhou ◽  
Xiao-shuo Chen ◽  
Yin-zhi Zhou ◽  
Wen-ye Wang ◽  
Peng Wang ◽  
...  
Keyword(s):  
Basalt Fibre ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Utility Tunnel

scholarly journals Sequential Laser–Mechanical Drilling of Thick Carbon Fibre Reinforced Polymer Composites (CFRP) for Industrial Applications

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2136
Author(s):  
Sharizal Ahmad Sobri ◽  
Robert Heinemann ◽  
David Whitehead
Keyword(s):  
Carbon Fibre ◽  
Polymer Composites ◽  
Weight Ratio ◽  
High Strength ◽  
Industrial Applications ◽  
Fibre Laser ◽  
Reinforced Polymer ◽  
Carbon Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Thrust And Torque

Carbon fibre reinforced polymer composites (CFRPs) can be costly to manufacture, but they are typically used anywhere a high strength-to-weight ratio and a high steadiness (rigidity) are needed in many industrial applications, particularly in aerospace. Drilling composites with a laser tends to be a feasible method since one of the composite phases is often in the form of a polymer, and polymers in general have a very high absorption coefficient for infrared radiation. The feasibility of sequential laser–mechanical drilling for a thick CFRP is discussed in this article. A 1 kW fibre laser was chosen as a pre-drilling instrument (or initial stage), and mechanical drilling was the final step. The sequential drilling method dropped the overall thrust and torque by an average of 61%, which greatly increased the productivity and reduced the mechanical stress on the cutting tool while also increasing the lifespan of the bit. The sequential drilling (i.e., laser 8 mm and mechanical 8 mm) for both drill bits (i.e., 2- and 3-flute uncoated tungsten carbide) and the laser pre-drilling techniques has demonstrated the highest delamination factor (SFDSR) ratios. A new laser–mechanical sequence drilling technique is thus established, assessed, and tested when thick CFRP composites are drilled.

Durability of coral-reef-sand concrete beams reinforced with basalt fibre-reinforced polymer bars in seawater

2021 ◽  
pp. 136943322098166
Author(s):  
Wang Xin ◽  
Shi Jianzhe ◽  
Ding Lining ◽  
Jin Yundong ◽  
Wu Zhishen
Keyword(s):  
Coral Reef ◽  
Marine Environment ◽  
Failure Modes ◽  
Concrete Beams ◽  
Shear Capacity ◽  
Initial Stiffness ◽  
Basalt Fibre ◽  
Rc Structures ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer

A combination of coral reef sand (CRS) concrete and fibre-reinforced polymer (FRP) bars provides an effective solution to the durability deficiency in conventional RC structures. This study experimentally investigates the durability of CRS concrete beams reinforced with basalt FRP (BFRP) bars in a simulated marine environment. Flexural tests are conducted on a total of fourteen CRS concrete beams aged in a cyclic wet-dry saline solution at temperatures of 25, 40 and 55°C. The variables comprise the types of reinforcement (steel and BFRP), the aging duration and the temperature. The failure modes, capacities, deflections and crack development of the beams are analysed and discussed. The results indicate that the ultimate load of the beams exhibits no degradation after aging, whereas the failure mode of the BFRP-CRS concrete beams transition from flexure to shear, which is caused by the degradation in the mechanical properties of the stirrups. The aged BFRP-CRS concrete beams show a substantial increase of over 70% in their initial stiffness compared with the control beams (beams without aging) and a substantial decrease in their crack width after aging due to the prolonged maturation of the concrete. Furthermore, a formula for calculating the shear capacity in the existing code is modified by a partial factor equal to 2, which can predict the capacity of a CRS concrete beam reinforced with BFRP bars in a marine environment.

scholarly journals Impact Properties of Aluminum Foam – Nanosilica Filled Basalt Fiber Reinforced Polymer Sandwich Composites

2018 ◽  
Vol 7 (3.11) ◽  
pp. 77
Author(s):  
Nurul Emi Nor Ain Mohammad ◽  
Aidah Jumahat ◽  
Mohamad Fashan Ghazali
Keyword(s):  
Energy Absorption ◽  
Basalt Fiber ◽  
Sandwich Composite ◽  
Sandwich Composites ◽  
Basalt Fibre ◽  
Reinforced Polymer ◽  
Closed Cell ◽  
The Face ◽  
Al Foam ◽  
Fibre Reinforced Polymer

This paper investigates the effect of nanosilica on impact and energy absorption properties of sandwich foam-fibre composites. The materials used in this study are closed-cell aluminum (Al) foam (as the core material) that is sandwiched in between nanomodified basalt fiber reinforced polymer (as the face-sheets). The face sheets were made of Basalt Fibre, nanosilica and epoxy polymer matrix. The sandwich composite structures are known to have the capability of resisting impact loads and good in absorbing energy. The objective of this paper is to determine the influence of closed-cell aluminum foam core and nanosilica filler on impact properties and fracture behavior of basalt fibre reinforced polymer (BFRP) sandwich composites when compared to the conventional glass fibre reinforced polymer (GFRP) sandwich composites. The drop impact tests were carried out to determine the energy absorbed, peak load and the force-deflection behaviour of the sandwich composite structure material. The results showed that the nanomodified BFRP-Al foam core sandwich panel exhibited promising energy absorption properties, corresponding to the highest specific energy absorption value observed. Also, the result indicates that the Aluminium Foam BFRP sandwich composite exhibited higher energy absorption when compared to the Aluminium foam GFRP sandwich composite.  

scholarly journals Processing and Mechanical Behavior of Banana Fibre Reinforced Epoxy based Composite with Alumina and silicon Carbide

2021 ◽  
pp. 434-441
Author(s):  
Kaushal Arrawatia ◽  
Kedar Narayan Bairwa ◽  
Raj Kumar
Keyword(s):  
Mechanical Properties ◽  
Polymer Composites ◽  
Glass Fibre ◽  
High Strength ◽  
Fibre Reinforcement ◽  
Fixed Amount ◽  
Reinforced Polymer ◽  
Banana Fibre ◽  
Percentage Weight ◽  
Fibre Reinforced Polymer

Polymer composites have outstanding qualities such as high strength, flexibility, stiffness, and lightweight. Currently, research is being performed to develop innovative polymer composites that may be used in many operational situations and contain a variety of fibre and filler combinations. Banana fibre has low density compared to glass fibre and it is a lingo-cellulosic fibre having relatively good mechanical properties compared to glass fibre. Because of their outstanding qualities, banana fibre reinforced polymer composites are now widely used in various industries. The primary goal of this study is to determine the effect of the wt.% of banana fibre, the wt.% of SiC, and the wt.% of Al2O3 in banana fibre reinforcement composites on the mechanical and physical properties of banana fibre reinforcement composites. Tensile strength and flexural strength of unfilled banana fibre epoxy composite increased with the increase in wt. of banana fibre from 0 wt.% to 12 wt.%. Further, an increase in wt.% banana fibre drop in mechanical property was observed. It has been concluded from the study that the variation in percentage weight of filler material with fixed amount (12 wt.%) of banana fibre affects the mechanical properties of filled banana reinforcement composites. Optimum mechanical properties were obtained for BHEC5 (72 wt.% Epoxy + Hardener, 12 wt.% banana fibre and 16 wt.% Al2O3).

Strengthening of Concrete Beams with Basalt Fibre Reinforced Polymer

2020 ◽  
Author(s):  
Eric Hughes ◽  
Adeyemi Adesina ◽  
Bruno Paini ◽  
Sreekanta Das ◽  
Niel Van Engelen
Keyword(s):  
Concrete Beams ◽  
Basalt Fibre ◽  
Reinforced Polymer ◽  
Fibre Reinforced Polymer
Sign in / Sign up

Export Citation Format

Share Document