Modeling of the strut-and-tie parameters of deep beams for shear strength prediction. (1st February 2016)

• Record Type: Journal Article
• Authors: Lim, Erwin; Hwang, Shyh-Jiann
• Is Part Of: Engineering structures. Volume 108(2016:Feb. 01)
• Page Start: 104
• Page End: 112
• Publication Date: 2016-02-01
• Subjects: Deep beam -- Structural parameter -- Shear strength prediction -- Strut-and-tie model; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2015.11.024
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: The strut-and-tie modeling should reflect the structural behavior of a deep beam. Geometrical dimensioning of macro model is important in shear strength estimation. With appropriate parameters, simple strut-and-tie method can produce good accuracy. Abstract: A generally accepted rational model to predict the shear strength of a structural member needs to satisfy Navier's three principles (force equilibrium, strain compatibility, and constitutive equations). However, a shear model satisfying these three principles usually requires rigorous computational effort. This study reveals that, if involved structural parameters are properly considered, a simple strut-and-tie model that merely satisfies force equilibrium can give similar accuracy compared to the sophisticated strain-compatible model. This finding was verified against 118 deep beam specimens tested in the laboratory. The important structural parameters identified are the definition of a shear element that is consistent with force discontinuity, the consideration of elastic behavior in estimating the width of a strut, the dimensions of a nodal zone influenced by a loading plate, and the proper selection of the probable failure modes.