JOINT SHAPE AND SEAM WIDTH INFLUENCE ON THE REINFORCED CONCRETE STRUCTURES CONNECTION BEARING CAPACITY IN TRANSPORT CONSTRUCTION
Journal Title: Збірник наукових праць Українського державного університету залізничного транспорту - Year 2018, Vol 178, Issue 12
Abstract
The reinforced concrete elements keyed joins three series experimental research results are presented. In the first series, one-keyed contact joints with rectangular, trapezoidal and triangular keys were investigated with key depth to the height ratio 0,5. The keys were reinforced in the shear plane in the height middle and in the two levels. The reinforcement yield strength was fyw = 210 ... 260 MPa, the reinforcement percentage was . The second series included single-keyed joints with rectangular keys and different seam widths = 25, 50, 100, 150, and 200 mm. The key size ratio was and 0.5. The keys were reinforced in the shear plane in their height middle (2Ø8), the reinforcement yield strength was fyw = 240 ... 260 MPa. The third series consisted of three-keyed joints, which varied: the joints supporting surface inclination angle, the joints width = 25, 50, 100, 150, 200 mm and 300, the number and the placing character on the key height. The keyed profile shape (rectangular, trapezoidal, triangular) and the seam width influence on the joints bearing capacity is determination. The stress-strain state, the crack formation character and the experimental models destruction are studied. It is established that the keyed supporting surfaces slope angle does not change their destruction character, but it affects the resistance value to destruction. The joints with a triangular profile have the greatest strength, and the joints with a rectangular profile have а smallest strength (the difference is up to 15%). Increasing the seam width reduces the joints bearing capacity and changes their destruction character. For single-keyed joints, there is a destruction on the key or seam. For three- keyed joints combinational destruction variants of are also observed. The limit load for three-keyed test specimens with a trapezoidal profile with an increase is reduced to 20%. The joints design parameters are established, which ensure their effective work.
Authors and Affiliations
Oksana Dovzhenko, Volodymyr Pohribnyi, Yevhen Chumak
Keywords
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- EP ID EP396519
- DOI 10.18664/1994-7852. 178.2018.139001
- Views 71
- Downloads 0
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