About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Juliya V. Mironova associate professor of the department of «Reinforced concrete and stone structures», Candidate of technical sciences, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it , ORCID: 0000-0001-6329-1325 |
| Title of the article | Stress-strain state of a monolithic joint with U-shaped and L-shaped connections during progressive collapse |
| Abstract. | Problem statement. Ensuring the reliability and stability of monolithic buildings under emergency conditions depends on the design solution, the strength and deformation characteristics of the load-bearing elements and their joints, and the manufacturability of the structural connections. The task has several solutions that are of a recommendatory nature due to the complexity of designing buildings with progressive collapse, which necessitates the development of optimal joint designs. The article compares different design solutions (U-shaped and L-shaped) for the connections between columns and floors, which enhance the resistance of building frames to critical loads that can cause immediate or prolonged collapse. It is an important task to take into account the different nature of the work and properties of the joint elements, the complex stress-strain state, and the extreme work of the materials. The purpose of the work consists in modeling the structural solutions of the monolithic joint between the column and the floor, which increase the resistance of the buildings load-bearing system to progressive collapse, and determining their stress-strain state, taking into account the critical behavior of the reinforcement. The objectives of the study are: calculation of the frame of a monolithic multi-storey building during progressive collapse to determine the maximum stresses in the elements; numerical modeling of the joint and analysis of its stress-strain state, development of an optimal solution for the connections based on the identified features of the joints operation, and development of recommendations for designing connections in the joint. Results. The maximum forces in the joints of columns and floors of a monolithic multi-storey frame under a hypothetical emergency impact are determined, and an option for modernizing the design of connections in the joint is proposed. A multifactorial numerical simulation of the joint is performed, taking into account the effect of tensile forces, and the strength and deformation characteristics are determined, and the excessive work of the reinforcement is taken into account. A solution and recommendations for designing connections in the joint are proposed, taking into account the progressive destruction. Conclusions. The significance of the obtained results lies in the fact that the proposed design solution for the joint of a column and a floor of monolithic multi-storey and high-rise buildings and the results of the study can be used in design to increase resistance to progressive collapse. |
| Keywords. | progressive collapse, monolithic frames of multi-storey buildings, column and floor joints, stress-strain state, reinforcement and concrete performance diagrams |
| For citations: | Mironova Yu.V. Stress-strain state of a monolithic joint between a column and a floor with U-shaped and L-shaped connections during progressive collapse // News of KSUAE, 2025, № 4 (74), p. 109-120, DOI: 10.48612/NewsKSUAE/74.10, EDN: KZWPZI |
