![]() Schäfer, Markus ![]() Report (2022) Background Documents for prEN 1994-1-1 Detailed reference viewed: 56 (1 UL)![]() Schäfer, Markus ![]() Report (2021) Development of second generation for Eurocode 4, part 1: prEN 1994-1-1: November 2021- Draft + Respons on comments Detailed reference viewed: 55 (1 UL)![]() Schäfer, Markus ![]() Report (2020) Development of second generation for Eurocode 4, part 1: prEN 1994-1-1: April 2020 Detailed reference viewed: 146 (5 UL)![]() ; ; Schäfer, Markus ![]() in Engineering Structures (2019), Engineering Structures 197:109417(109417), 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 ... [more ▼] 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. [less ▲] Detailed reference viewed: 116 (1 UL)![]() Zhang, Qingjie ![]() ![]() in The 2019 World Congress on Advances in Structural Engineering and Mechanics (ASEM19) (2019, September 17) Composite slabs lead to slim and economic structural solutions with a low selfweight. The determination of their moment resistance follows the regulations presented in EN 1994-1-1 (2004) which are based ... [more ▼] Composite slabs lead to slim and economic structural solutions with a low selfweight. The determination of their moment resistance follows the regulations presented in EN 1994-1-1 (2004) which are based on plastic design methods. The current version of Eurocode 4 does not consider explicitly additional reinforcement in the ribs for sagging moment resistance. However, the construction industry requires this possibility in order to provide economical and flexible design. Regarding this situation, further investigations are necessary to prove the applicability of plastic design methods. In the case of high bottom reinforcement ratio, a deep position of the plastic neutral axis occurs, and concrete compression failure may happen before most parts of the profiled steel sheeting and reinforcement yield. This leads to an overestimation of the bending resistance according to the plastic design method. A parametric study, based on approximately 290.000 different combinations of various cross-section geometries and materials, is provided to compare the plastic moment resistance with the resistance determined by strain-limited design. The results show that limitations are necessary to be enabled for the general application of plastic design methods. [less ▲] Detailed reference viewed: 75 (7 UL)![]() Schäfer, Markus ![]() Report (2019) April draft of second generation for Eurocode 4: EN 1994-1-1; Outcome from SC4.T6 Detailed reference viewed: 123 (6 UL) |
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