Article

Bearing capacity evaluation of keyed joints in precast-cast-in-place reinforced concrete structures for effective rehabilitation

Довженко, О.О.

In order to effectively rehabilitate buildings and structures andensuretheir serviceability, it is important to improve precision of the estimationof thekeyed joints ultimate load in prefabricated and prefabricated monolithicstructures made of reinforced concrete and their remaining service life. Inthisdirection, the introduction of a general theoretical method for calculating bearingcapacity is promising. Аdapted to concrete and reinforced concrete apparatusof the plasticity theory, the variational method, and the possible velocities principleare used. The criterion for the plasticity theory application is the conditionof simultaneous achievement of the ultimate stresses in the compressed andtensileareas of the failure surface. The kinematic schemes of failure of keyed jointsareproposed, which are adopted on the basis of the failure nature study andreflect the behavior of the element in a limit state. Formulas are proposedforcalculating the ultimate load of single keyed joints that fail by key shearing, seamshearing along an inclined plane, and splitting of an inclined compressedstrip. They allow to fully consider the factors influencing the joints bearing capacity. Results obtained in experiments confirm the theoretical assessment reliability.

English

2025-06-01

несуча здатність

IOP Publishing Ltd

Bearing capacity evaluation of keyed joints in precast-cast-in-place reinforced concrete structures for effective rehabilitation / O.O. Dovzhenko, V.V. Pohribnyi, O.G. Fenko, V.A. Tytarenko, P.A. Yurko // IOP Conference Series: Earth and Environmental Science. – 2025. – Vol. 1499, Iss. 1 : International Conference on Urban Infrastructure Sustainable Development and Renovation (MistoBUD-2025), 30.01.2025 - 01.02.2025, Kharkiv, Ukraine. – 012011. – DOI 10.1088/1755-1315/1499/1/012011