Long-Term Performance of a Glass Fiber-Reinforced Polymer Truss Bridge

An assembled plane truss structure used for vehicle loading is designed and manufactured. In the truss, the glass fiber reinforced polymer (GFRP) tube and the steel joint are connected by a new technology featuring a pretightened tooth connection. The detailed description for the rod and node design is introduced in this paper, and a typical truss panel is fabricated. Under natural conditions, the short-term load test and long-term mechanical performance test for one year are performed to analyze its performance and conduct a comparative analysis for a reasonable FEM model. The study shows that the design and fabrication for the node of an assembled truss panel are convenient, safe, and reliable; because of the creep control design of the rods, not only does the short-term structural stiffness meet the design requirement but also the long-term creep deformation tends towards stability. In addition, no significant change is found in the elastic modules, so this structure can be applied in actual engineering. Although the safety factor for the strength of the composite rods is very large, it has a lightweight advantage over the steel truss for the low density of GFRP. In the FEM model, simplifying the node as a hinge connection relatively conforms to the actual status.

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Service-life-prediction and field application of glass fiber-reinforced polymer tubular and solid bolts based on laboratory physical and mechanical assessment

Journal of Composite Materials ◽

10.1177/0021998318764806 ◽

2018 ◽

Vol 52 (24) ◽

pp. 3309-3323 ◽

Cited By ~ 2

Author(s):

Brahim Benmokrane ◽

Hamdy M Mohamed ◽

Ahmed H Ali

Keyword(s):

Service Life ◽

Glass Fiber ◽

Fiber Reinforced Polymer ◽

Ground Control ◽

Fiber Reinforced ◽

Glass Fiber Reinforced Polymer ◽

Rock Bolts ◽

Reinforced Polymer ◽

Glass Fiber Reinforced

This paper presents the physical, mechanical, and durability characterization of glass fiber-reinforced polymer solid and tubular bars. These bars were subsequently used as rock bolts for ground control of the Jurong Rock Caverns in Singapore. The long-term performance of these bars was assessed under harsh environmental exposure (saline solution) simulating the subsea cavern water. The test parameters were (1) type of bars (solid and tubular), (2) temperature (20, 40, and 50℃), and (3) conditioning time (1000, 3000, and 5000 h). The measured tensile strengths of the bars before and after exposure were considered as a measure of the durability performance of the specimens and were used for long-term properties prediction based on a theoretical model. Moreover, microstructural analyzes using scanning electronic microscopy, Fourier transform infrared spectroscopy, and differential scanning calorimetry are also conducted to investigate the deterioration of fiber, matrix, and the fiber/matrix interface due to environmental conditioning. The results show the very high long-term durability of solid and tubular glass fiber-reinforced polymer rock bolts exposed to field conditions. The predicted tensile strength retention at a MAT of 32℃, with an RH of 100%, is 0.90 and 0.82 for a service life of 100 years for solid and tubular glass fiber-reinforced polymer bars, respectively. Based on the findings of this research, the tested glass fiber-reinforced polymer rock bolts were recommended as alternatives to stainless-steel rock bolts and successfully used as ground control in the Jurong Rock Caverns in Singapore.

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Experimental Study on Long-Term Ring Deflection of Glass Fiber-Reinforced Polymer Mortar Pipe

Advances in Materials Science and Engineering ◽

10.1155/2019/6937540 ◽

2019 ◽

Vol 2019 ◽

pp. 1-10

Author(s):

Sun-Hee Kim ◽

Soon-Jong Yoon ◽

Wonchang Choi

Keyword(s):

Glass Fiber ◽

Large Diameter ◽

Fiber Reinforced Polymer ◽

Soil Conditions ◽

Fiber Reinforced ◽

Glass Fiber Reinforced Polymer ◽

In Situ Tests ◽

Reinforced Polymer ◽

Glass Fiber Reinforced

Long-term pressurizing of buried glass fiber-reinforced polymer (GFRP) pipe will result in the reduction of stiffness in the pipes. It leads to excessive deflections in long-term design limits. In situ tests were performed for 664 days to measure deflections of buried GFRP pipe with a large diameter of 2,400 mm. Based on the field test results, finite element analysis was conducted to determine the pipe deflections with respect to the soil conditions and buried depth as variables. Regression analysis has been conducted to determine the long-term deflection of the GFRP pipe after 50 years of construction. The long-term deflection of the GFRP pipe was less than 5 percent suggested by the existing specifications including ASTM D5365 and AWWA M45. The comparison indicates the current specifications significantly conservative to predict long-term deflection of the buried GFRP pipe.

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Design and Analysis of Glass Fiber Reinforced Polymer Leaf Spring

Indian Journal Of Applied Research ◽

10.15373/2249555x/aug2013/70 ◽

2011 ◽

Vol 3 (8) ◽

pp. 211-215

Author(s):

Devendra. K Damor ◽

◽

K. D Kothari K. D Kothari

Keyword(s):

Glass Fiber ◽

Fiber Reinforced Polymer ◽

Leaf Spring ◽

Fiber Reinforced ◽

Glass Fiber Reinforced Polymer ◽

Reinforced Polymer ◽

Glass Fiber Reinforced

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

Machines ◽

10.3390/machines9010016 ◽

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.

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