We have developed light and durable mirrors made of CFRP (Carbon Fiber Reinforced Plastics) laminates for the re ector of the new CANGAROO-II 7 m telescope. The re ector has a parabolic shape (F/1.1) with a 30 m 2 e ective area which consists of 60 small spherical mirrors. The attitude of each mirror can be remotely adjusted by stepping motors. After the rst adjustment work, the re ector o ers ...

................................................................................................................................. i Dedication........................................................................................................................... iii Acknowledgements............................................................................................................. i...

a large number of bridges and buildings that are currently used, are made of slabs with opening. some of these buildings and bridges have been severely damaged because of natural disasters such as earthquake, storm and other effects such as materials fatigue and alkaline and corrosive agents. therefore, retrofitting and strengthening of these structures is essential and affordable. in this rese...

Abstract The FRP material plays a major role as strengthening in RC structural elements. It is popularly used to improve the load carrying capacity and stiffness elements by wrapping with sheets (combination of GFRP & CFRP). usefulness laminates external at both sides full vertical strips interval 100mm on beams studied.. In this experimental study nine reinforced concrete were cast that th...

Carbon fiber reinforced plastic (CFRP) is regarded as a suitable material for large, high-precision reflectors (mirrors) used in high-resolution space observatories because of its high specific elasticity and low coefficient thermal expansion. However, it was made clear that non-negligible out-of-plane deformation generated CFRP orientation errors occurring during manufacturing. In this study, ...

Advances in the fields of polymers and composites have resulted in a major development of high strength fibre reinforced polymers (FRP). These materials offer great potential for cost-effective retrofitting of concrete structures. In response to the growing need for concrete repair and rehabilitation, an experimental program was conducted at the University of Manitoba in Winnipeg, Manitoba, Can...

Studies on the flexural behavior of post-tensioned beams subjected to strand damage and strengthened with near-surface mounted (NSM) technique using carbon fiber-reinforced polymer (CFRP) are limited fail examine effect CFRP laminates strain strengthening efficiency systematically. Furthermore, a design approach for UPC structures in existing guidelines FRP techniques is lacking. Hence, NSM-CFR...

Introduction In the 1970s, exterior bonded steel reinforcement was used sporadically to reinforce bridges to attain higher service load capacities. This steel post-strengthening system consisted of steel straps bonded with epoxies to the exterior of concrete beams. An alternative to the steel retrofit is woven carbon fiber reinforced polymer fabric applied in the same manner as steel. Carbon fi...