Experimental testing of wood‐concrete and steel‐concrete composite elements in comparison with numerical testing

Abstract

The paper presents the results of experimental tests with a numerical comparison of some typical composite element systems. Two different kinds of elements were tested: composite steel‐concrete and composite wood‐concrete elements. Deflections at midspan under monotonously increasing static load on simply supported beams were measured. The affects of different types of composite connections on the results were researched. In numerical tests the structure was modeled with two‐dimensional plane elements. The composite surface was modeled with two‐dimensional contact (interface) elements for the continuous connection simulation and modified beam elements for the discrete connection simulation. The applied material models include the most important nonlinear effects of concrete, steel and wood behavior, as well as the nonlinear behavior of the composite surface at the connection. The achieved results of the developed numerical model were compared with the results obtained through the experimental test.

Bending behavior of adhesively-bonded engineered wood-concrete composite decks

“…Adhesive bonding is often considered as rigid. The application of glued wood-concrete connections is not fully explored and the knowledge in this area is limited [1][2][3][4][5][6][7], let alone the relevant specifications in standards.…”

“…Studies [1][2][3][4][5][6][7] demonstrated that glued TCC systems had higher stiffness (e.g. slip modulus of connections and bending stiffness of TCC beams) compared to mechanically connected ones, and sufficient adhesion strength for structural applications under short-term loading and ambient-temperature.…”

“…slip modulus of connections and bending stiffness of TCC beams) compared to mechanically connected ones, and sufficient adhesion strength for structural applications under short-term loading and ambient-temperature. The wood products involved in these studies [1][2][3][4][5][6][7] were solid timber, glulam or vertically used laminated veneer lumber (LVL) Assuming the rigid characteristics of the used adhesives, the behavior of these kinds of TCC beams was characterized by assuming continuous strain at the wood-concrete interface and using the known transformed cross-section procedure [5,[8][9][10].The low shear modulus of transverse layers in the CLT and LVL boards subjected to bending can cause significant shear deformation (or slip) and hence increase the deflection. In the present work, the authors studied the shear behavior of glued CLT-and LVL-concrete connections [11].…”