2026/04/01 by Albena Doicheva · 1 voice
Engineering · Materials Science · #Seismic Performance and Analysis #Structural Behavior of Reinforced Concrete #Structural mechanics and materials
paper · doi:10.1088/1757-899x/1349/1/012001
openalex publication_date 2026/04/01 · openalex created_date 2026/05/19 · openalex updated_date 2026/07/29
Abstract The beam-column connection is the main element in frame structures, ensuring the integrity and stability of the building. Cyclic lateral loads, in particular earthquakes, cause serious damage to frame joints. The shear forces generated damage the integrity of the beam-column connection. The recommendations in the literature for the determination of these forces is based on an approximate static calculation. There are also empirical formulas or capacitive calculation applied in current codes. All these methods are not based on slender static formulas guaranteeing unambiguous answers for the magnitude of the shear force arising from the action of a specific load. The involvement of the concrete section of the beam is neglected. In the search for accurate values for the shear force at the joint, with the possibility of avoiding the listed drawbacks, a number of analytical solutions have been carried out for beams under the action of different types of loads taking into account the shape of the beam cross-section and the characteristics of the construction materials. In this paper, the derived formulae will be applied to investigate the contribution to the shear force of various parameters involved in the expressions. Experimental investigations indicate a significant contribution of concrete strength to the shear force value. Numerical solutions for a cantilever beam will confirm the experimental observations, and will prove a change in shear force by 13 to 15% when using high-strength concretes. The differences in shear force by the types of loads vary from 1-3%, and the change in the cross-section of the reinforcing bars - from 1-3%.