The use of glass fibre reinforced polymer composites as reinforcement for tubular concrete poles

摘要

This paper presents the results of a theoretical and experimental study carried out on the possibility of using polymer composites reinforcing elements for a power supply tubular reinforced concrete (RC) column. The composite reinforcing elements are utilized both as longitudinal glass reinforced thermosetting polymer (vinyl-ester) bars and transverse reinforcement made of a glass fibre reinforced polypropylene (GFPP) spiral. The columns have been fabricated using the existing manufacturing facilities based on centrifuging procedure. An experimental program has been organized to determine the mechanical characteristics of the GFPP spiral and bonding of this composite element to concrete. The program has been extended to evaluate structural response of spun-cast element according to existing standard tests. A 4m long hollow tapered RC column has been tested to assess the load-deformation characteristics. A theoretical analysis has been performed to prove the suitability of existing calculation formulas for serviceability and ultimate limit states. The study confirms the possibility of using composite reinforcement for hollow tapered RC columns.