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Bài viết Nghiên cứu thực nghiệm xác định ứng xử chịu cắt của dầm bê tông có cốt thép đai bị ăn mòn được tăng cường bằng bê tông cốt lưới dệt trình bày một số kết quả nghiên cứu thực nghiệm để xác định ứng xử chịu cắt của dầm bê tông có cốt thép đai bị ăn mòn được tăng cường bằng bê tông cốt lưới dệt. | Transport and Communications Science Journal Vol 73 Issue 2 02 2022 111-126 Transport and Communications Science Journal EXPERIMENTAL STUDY ON SHEAR BEHAVIOR OF REINFORCED CONCRETE BEAMS WITH CORRODED STIRRUPS STRENGTHENED WITH CARBON TEXTILE REINFORCED CONCRETE Nguyen Huy Cuong1 Dinh Huu Tai1 Le Minh Canh2 1 University of Transport and Communications No 3 Cau Giay Street Hanoi Vietnam 2 Campus in Ho Chi Minh city University of Transport and Communications 450-451 Le Van Viet Street Ho Chi Minh city Vietnam ARTICLE INFO TYPE Research Article Received 13 07 2021 Revised 27 09 2021 Accepted 15 10 2021 Published online 15 02 2022 https doi.org 10.47869 tcsj.73.2.2 Corresponding author Email nguyenhuycuong@utc.edu.vn Tel 8498 983 2425 Abstract. Corrosion of embedded reinforcing steel is widely accepted as the primary contributor causing premature damage to reinforced concrete RC structures. The Textile Reinforced Concrete TRC system is a relatively new technology in reparing and strengthening concrete structures including flexure shear and confinement. This paper reports an experimental investigation on the shear behavior of the corroded RC beams with stirrups having different levels of corrosion. The shear resistance contributions from the corroded RC beams and carbon TRC at various volume ratios were carefully examined. Eighteen beams were tested including twelve beams subjected by an electrochemically accelerated aging technique for 60 and 90 days to obtain the theoretical mass loss in their stirrups of 10 and 20 respectively. The stirrups were locally corroded in the shear span. A three-point bending test was applied to observe the shear behavior of the corroded beams. Eight corroded RC beams were strengthened with 2 and 3 layers of carbon textile in the form of U-wraps. The objective of the test program was to investigate the shear performances of strengthened beams loaded up to failure including load-deflection behavior crack patterns ultimate capacities and .
