scholarly journals Seismic Retrofitting of Traditional Masonry with Pultruded FRP Profiles

2020 ◽  
Vol 10 (7) ◽  
pp. 2489 ◽  
Author(s):  
Francesca Sciarretta
Keyword(s):  
Maximum Load ◽  
Seismic Retrofitting ◽  
Fiber Reinforced Polymer ◽  
Experimental Program ◽  
Future Research ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Before And After ◽  
Basic Frame

This paper presents a study on the potentiality of seismic retrofitting solutions with pultruded Fiber Reinforced Polymer (FRP) profiles. This material can be used in connected frames providing lightweight, corrosion-free and reversible retrofitting of masonry buildings with the moderate requirements of surface preservation. In a hypothetical case study, an experimental program was designed; monotonic shear tests on a half-size physical model of the sample wall were performed to assess the structural performance before and after retrofitting with a basic frame of pultruded Glass Fiber Reinforced Polymer (GFRP) C-shaped profiles, connected to the masonry by steel threaded bar connections. During the tests, the drift, the diagonal displacements in the masonry and the micro-strain in the profiles were measured. The retrofitted system has proven very effective in delaying crack appearance, increasing the maximum load (+85% to +93%) and ultimate displacement (up to +303%). The failure mode switches from rocking to a combination of diagonal cracking and bed joint sliding. The gauge recordings show a very limited mechanical exploitation of the GFRP material, despite the noticeable effectiveness of the retrofit. The application seems thus promising and worth a deeper research focus. Finally, a finite element modelling approach has been developed and validated, and it will be useful to envisage the effects of the proposed solution in future research.

Development of a glass-fiber-reinforced-polymer bridge deck system

2007 ◽  
Vol 34 (3) ◽  
pp. 453-462
Author(s):  
Emile Shehata ◽  
Aftab Mufti
Keyword(s):  
Bridge Deck ◽  
Load Level ◽  
Fiber Reinforced Polymer ◽  
Experimental Program ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Shear Key ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Service Load

Development of an efficient and durable bridge deck system is a priority for most highway departments worldwide. This paper summarizes the results of an experimental program designed to study the behaviour of innovative glass-fiber-reinforced-polymer (GFRP) bridge deck modules and their transverse connection. The deck consisted of a number of triangular filament-wound tubes bonded with epoxy resin. Pultruded GFRP laminates were adhered to the top and bottom of the tubes to create one modular unit. The experimental program described in this paper discusses the evolution of the last two generations of the bridge deck. The description of the first and second deck generations was presented in an earlier paper. For the third-generation GFRP deck, a full-scale prototype specimen was subjected to 2 × 106 cycles at 135% of the service load level and was tested to failure afterward. The fourth-generation bridge deck system was fabricated by optimizing the weight of the deck section and then tested to failure. The performance was evaluated on the basis of load capacity, failure mode, deflection at service load level, and stiffness degradation under cyclic loading. Another phase of the work was to establish a means of connecting adjacent deck panels. A GFRP shear key was designed, manufactured, and installed in a full-scale deck module to address this need. Assessment of the structural adequacy in both resisting repeated loading and transmitting loads between adjacent deck modules is presented. The GFRP deck system with and without the shear key was capable of resisting 2 × 106 cycles of an equivalent American Association of State Highway and Transportation Officials HS30-design truck wheel load plus the dynamic load allowance of the bridge deck.Key words: bridge decks, advanced composite materials, shear key, glass fibers, fiber-reinforced polymers, filament winding, pultrusion.

Experimental Investigation and Analytical Modeling of Eccentrically Loaded Composite Short Columns Confined with Glass Fiber-Reinforced Polymer Tube

2010 ◽  
Vol 168-170 ◽  
pp. 143-151
Author(s):  
Hong Bo Guan ◽  
Qing Xiang Wang ◽  
Bing Feng Ruan
Keyword(s):  
Glass Fiber ◽  
Analytical Modeling ◽  
Fiber Reinforced Polymer ◽  
Experimental Program ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Short Columns ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Polymer Tube

This paper presents the results of the experimental program and analytical modeling for performance evaluation of the eccentrically loaded composite short columns confined with Glass Fiber-Reinforced Polymer (GFRP) tube. This test matrix included six specimens, which were tested in the variable eccentricity. Research findings indicated that the strength of the concrete-filled GFRP tubular column was enhanced correspondingly; however, the strength gain caused by the GFRP tube decreased as the ratio of e/d0 was increased. A nonlinear analysis that accounts for the change in eccentricity caused by the lateral deformation was proposed to predict the columns’ strength. A comparison between analytical and experimental results of the present study demonstrated the accuracy and validity of the proposed analysis.

Research on Static Load Tests of Damaged Bridge Strengthened with Pre-Stressed HFRP

2014 ◽  
Vol 1079-1080 ◽  
pp. 258-265
Author(s):  
Chen Ning Cai ◽  
Shan He ◽  
Li Na Liu ◽  
Shi Kun Ou
Keyword(s):  
Static Load ◽  
Flexural Rigidity ◽  
Fiber Reinforced Polymer ◽  
Test Results ◽  
Structural Members ◽  
Fiber Reinforced ◽  
Hybrid Fiber ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Load Tests

Thispaper presents an experimental study to strengthen an existing bridge usingpre-stressed carbon fiber reinforced polymer (CFRP) and glass fiber reinforced polymer(GFRP) materials. The method using pre-stressed hybrid fiber reinforced polymer(HFRP) to strengthened structural members is an emerging pre-stressed strengtheningtechnology. In this study, experimental data selected from result of staticloading test conducted to hollow slabs with CFRP/GFRP has been compared with specimenswithout strengthening. Test results showed that the strengthening methoddeveloped in this study could effectively reduce the stress in hollow slab,improving the flexural rigidity and inhibiting the concrete from fracture.

scholarly journals Investigation into the Effect of Cutting Conditions in Turning on the Surface Properties of Filament Winding GFRP Pipe Rings

Machines ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 16
Author(s):  
Gabriel Mansour ◽  
Panagiotis Kyratsis ◽  
Apostolos Korlos ◽  
Dimitrios Tzetzis
Keyword(s):  
Surface Roughness ◽  
Glass Fiber ◽  
Process Parameters ◽  
Filament Winding ◽  
Numerical Control ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced

There are numerous engineering applications where Glass Fiber Reinforced Polymer (GFRP) composite tubes are utilized, such as desalination plants, power transmission systems, and paper mill, as well as marine, industries. Some type of machining is required for those various applications either for joining or fitting procedures. Machining of GFRP has certain difficulties that may damage the tube itself because of fiber delamination and pull out, as well as matrix deboning. Additionally, short machining tool life may be encountered while the formation of powder like chips maybe relatively hazardous. The present paper investigates the effect of process parameters for surface roughness of glass fiber-reinforced polymer composite pipes manufactured using the filament winding process. Experiments were conducted based on the high-speed turning Computer Numerical Control (CNC) machine using Poly-Crystalline Diamond (PCD) tool. The process parameters considered were cutting speed, feed, and depth of cut. Mathematical models for the surface roughness were developed based on the experimental results, and Analysis of Variance (ANOVA) has been performed with a confidence level of 95% for validation of the models.

Review on glass fiber reinforced polymer composites

2021 ◽  
Author(s):  
Priyadarsini Morampudi ◽  
Kiran Kumar Namala ◽  
Yeshwanth Kumar Gajjela ◽  
Majjiga Barath ◽  
Ganaparthy Prudhvi
Keyword(s):  
Glass Fiber ◽  
Polymer Composites ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Glass Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Fiber Reinforced Polymer Composites
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