Bài viết Ảnh hưởng của chiều sâu khóa đến khả năng chịu cắt của khóa chống cắt đơn trong cấu kiện lắp ghép phân đoạn bê tông cốt thép dự ứng lực tập trung khảo sát khả năng chịu cắt của một khóa chống cắt đơn không bố trí cốt thép và có bố trí cốt thép khi thay đổi chiều sâu khóa trong khi chiều cao khóa không đổi để xác định chiều sâu khóa hợp lý nhằm góp phần hoàn thiện công tác thiết kế cũng như khai thác bảo dưỡng kết cấu cầu dầm bê tông cốt thép lắp ghép phân đoạn. | Transport and Co mmunications Science Journal Vol 73 Issue 9 12 2022 835-848 Transport and Co mmunications Science Journal THE EFFECT OF KEY DEPTH ON SHEAR RESISTANCE OF SINGLE KEY IN SEGMENTAL ASSEMBLY OF PRESTRESSED REINFORCED CONCRETE Nguyen Dac Duc1 Nguyen Ngọc Long1 Tran Duc Nhiem1 Hoang Nhat Minh2 1 University of Transport and Co mmunications No3 Cau Giay Street Lang Thuong Ward Dong Da District Hanoi Vietnam 2 Viettel Aerospace Institute Viettel Building Hoa Lac Hi-Tech Park Co mmune Tan Xa Thach That District Hanoi Vietnam. ARTICLE INFO Received 30 09 2022 Revised 10 11 2022 Accepted 28 12 2022 Published online 15 12 2022 https Corresponding author Email minhhn5@ Tel 84 0976840260 Abstract. The segmental girder bridge is assembled by segments. These segments are connected at joints by prestressed cables shear key and epoxy glue. The moment resistance of the section at the joint thanks to the prestressed cables and the compressive strength of the concrete is calculated as a conventional flexural prestressed reinforced concrete structure. However the joints have not reinforcement and stirrups so the shear resistance of the joint depends on the shear resistance of the shear key itself the friction of the smooth surfaces and component of prestressed reinforcement if any. This has been shown by many experimental studies simulations and in many standards of AASHTO DIN EURO CODE which the shear resistance of the shear key itself has a significant proportion. The shear resistance of key depends not only on compressive strength of concrete height key but also the key depth significantly. Many studies have been done to give the formula for calculating the shear resistance of the key itself as well as the joint but only performed on one or some specific key sizes so that they do not reflect the effect of key depth on shear resistance. This paper focuses on investigating the shear resistance of a single key without .
