Static strength of the shear connectors in steel-concrete composite beams: Regulations and research analysis

Abstract

The paper reviews the most important analytic expressions, on the basis of the developed industrial countries' contemporary literature, for determination of strength of shear connectors in steel-concrete composite beams. The mechanism of possible failure and basic criteria used for defining of the shear connecter strength at composite slabs and composite slabs with profiled sheet. Special analysis has been done in the expressions and recommendations given by Eurocode 4 in the area of shear connecter strength, both elastic and rigid. For ail the presented regulations, a comparative analysis with our standing standard (JUS) addressing this area is given. Along with the comparative review of the regulations, a commentary on the strength of the shear connectors in composite beams is given

Parametric study of I-shaped shear connectors with different orientations in push-out test

“…In this study, the composite beam is composed by an HEB160 steel beam connected to a concrete slab of dimensions (36×32×12 cm 3 ) reinforced by 4 rebars of 8 mm in diameter so 4Φ8 in both directions, as shown in Fig. (2). The connection is made up by means of an IPE120 shear connector.…”

“…The used concrete mixes are listed in Tab. (2). In order to avoid the disparity of concrete compressive strength from one slab to another, the slabs of all the push-out specimens were cast vertically; the friction effect at the steel-concrete interface was eliminated by oiling the steel flanges before casting the slabs.…”

“…However, only few are proposed in the Eurocode 4 [1], therefore, Push-out tests are used in order to study the behavior of shear connectors and their efficacity. Shear connectors are generally divided into two classes, rigid, and flexible "ductile" connectors depending on the distribution of shear forces and the functional relationship between force and interfacial slip [2]. Note that, the various studies carried out on shear connectors for more than 50 years, have shown that there is no ideal connector [3].…”

Evaluation of Load Carrying Capacity of the Perforated Shear Connector with Flange Heads

“…The regulations for the rigid shear connector's strength are generally expressed in the form of Eq. 4 [4].…”

Redistribution effects in linear elastic analyses of continuous composite steel-concrete beams according to Eurocode 4

“…As a consequence, the analysis of composite structures is complex and requires the nonlinear analysis and appropriate computer software [5][6][7][8][9][10]. However, in order to simplify the design, contemporary design codes, such as Eurocode 4 [11] (EC4), are still mainly based on linear-elastic analysis with some modifications in order to take into account the present nonlinearities [4,11,12].…”