Strengthening of Precast Concrete Manhole Cover using GFRP Wrapping System

2017 ◽  
Vol MCSP2017 (01) ◽  
pp. 1-3
Author(s):  
Soumya Priyadarsini Pradhan ◽  
Manoj Kumar Rath ◽  
Rakesh Kumar Jena
Keyword(s):  
High Performance ◽  
Fiber Composite ◽  
Precast Concrete ◽  
Fiber Reinforced Polymer ◽  
Fiber Reinforced ◽  
Heavy Load ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Modern Cities ◽  
High Performance Composite

Today’s new high performance composite materials can be engineered to meet specific and critical needs in modern cities and industries. Fiber Reinforced Polymer (FRP) is considered to be the best alternate material for manhole covers as it has longer life span and has the capability to withstand heavy load. The invention related to Strengthening of precast concrete manhole cover by using fiber composite. Three sample of circular manhole cover were constructed for this experimental test program. Two different strengthening schemes were used in this paper. Sample 1 includes strengthened control slabs and other two were strengthened with Glass Fiber Reinforced Polymer (GFRP) Laminates. The strengthening of manhole covers was done with different layers of GFRP wraps. This is why investigation was undertaken to increase the durability of precast concrete covers. The high effectiveness of fiber reinforcement enhancing the load bearing capacity of concrete covers was investigated.

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.

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