[en] In web opening regions, a significant share of the global shear force is redistributed from the perforated web of the steel beam to the reinforced concrete (RC) slab.
This redistribution leads to vertical forces in the shear connectors close to both edges of the opening and influences the internal forces in the steel beam and the RC
slab over a length of approximately three times the opening length a0. The global shear failure in the web opening region is affected by the rather brittle behavior of
the concrete and is either characterized by a diagonal shear cracking failure of the RC slab, or a local bending failure at the opening edges, or vertical connector
failure (concrete break-out) at the ends of the opening. This paper is intended to clarify the structural behavior of web opening regions and proposes easy-to-use
models that make it possible to analyze the local internal forces of each partial beam in a mechanically consistent manner. Based on these models, a novel design
procedure is presented, that allows efficient design and dimensioning of web openings as well as prediction of shear resistance and failure mode.
Disciplines :
Civil engineering
Author, co-author :
Claßen, Martin; RWTH Aachen University > Institut für Massivbau (IMB) / Institute of Structural Concrete
Kurz, Wolfgang; Technische Universität Kaiserslautern > Fachgebiet Stahlbau > Professor
Schäfer, Markus ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit
Hegger, Joseph; RWTH Aachen / RWTH Aachen University > Institut für Massivbau (IMB) / Institute of Structural Concrete > Professor
External co-authors :
yes
Language :
English
Title :
A mechanical design model for steel and concrete composite members with web openings
