Numerical and experimental investigation of prestressed steel-concrete composite beams

Abstract

Prestressing in building structures has been used for a long time. However, the prestressing of structures with a combined cross section, such as steel-concrete structures, has appeared recently. The report is devoted to the structural types of prestressed steel – concrete structures, the description of technical solutions and comparative analysis with known sources. A comparative analysis of the methods of prestressing steel – concrete beams with widespread methods of prestressing reinforced concrete and steel structures is carried out. The article is devoted to prestressed composite beams, the identification of both the stress – strain state of beams of a composite section from prestressing and from operational loads is analyzed. Analytical expressions are given for assessing the strength of prestressed steel – concrete bending elements for different methods of prestressing, and the results of numerical and full-scale tests. Comparisons of the results of numerical and field experiments in the form of graphs are given. In conclusion, satisfactory convergence of various methods for assessing the strength of prestressed beams with experimental studies is noted.

A nonlinear geometric model for pre-stressed steel–concrete composite beams

“…Then, the resulting B m L matrix of order 3x12 is obtained from Eq. (12). Furthermore, the bending part corresponds to the classical DKQ proposed by Batoz and Tahar [17].…”

“…Knowing matrices S and R, matrix B L can be computed from Eq. (12). For computational strategy, matrix G is computed only once at the beginning of the analysis, while matrix S is updated during the nonlinear process.…”

“…Celik et al [12] study the effect of external pre-stressing on the system capacity of steel-concrete composite beams under cyclic loads and the response of the stud behavior in this situation. The authors highlight that the tendon affect the stress distribution and lateral displacements in the studs, system capacity and ductility positively.…”