Next Article in Journal
Lung Field Segmentation in Chest X-rays: A Deformation-Tolerant Procedure Based on the Approximation of Rib Cage Seed Points
Previous Article in Journal
Infrared Image Adaptive Enhancement Guided by Energy of Gradient Transformation and Multiscale Image Fusion
Open AccessArticle

Equivalent Axial Stiffness of Horizontal Stays

Department of Civil and Industrial Engineering, University of Pisa, Largo Lazzarino, 1-56122 Pisa, Italy
Appl. Sci. 2020, 10(18), 6263; https://doi.org/10.3390/app10186263
Received: 18 August 2020 / Revised: 2 September 2020 / Accepted: 6 September 2020 / Published: 9 September 2020
(This article belongs to the Section Civil Engineering)
Cable-stayed structures are widely employed in several fields of civil, industrial, electrical and ocean engineering. Typical applications are cable-stayed building roofs, bridges, guyed masts, overhead electrical lines, and floating device anchorages. Since the cable behavior is often highly nonlinear, suitable equivalent mechanical cable models are often adopted in analyzing this kind of structures. Usually, like in the classical Dischinger’s approach, stays are treated as straight rods offering an equivalent axial tangent stiffness, so that each of them can be substituted with an appropriate equivalent nonlinear spring or truss element. Formulae expressing equivalent stiffness provided by classical methods are satisfactory only when the cable is highly stressed, and therefore its sag is small with respect to its chord; on the contrary, when the cable is slack, they give often contradictory or meaningless results. Aiming to remove that limitation, a more refined approach based on the application of the virtual work principle is discussed. Important products of that original rational criterion are accurate and closed form innovative expressions of the tangent stiffness of the cable, whose field of application is independent on the sag to chord ratio of the cable, as well as on the magnitude of the normal stresses. Referring to some relevant case studies, the results obtained applying these new formulae are critically discussed for cables made of different materials, also in comparison with the approximate expressions provided by simplified methods. View Full-Text
Keywords: stay; cable; equivalent stiffness; Dischinger’s modulus; catenary; nonlinear behavior; virtual work principle; cable stayed; overhead lines stay; cable; equivalent stiffness; Dischinger’s modulus; catenary; nonlinear behavior; virtual work principle; cable stayed; overhead lines
Show Figures

Figure 1

MDPI and ACS Style

Croce, P. Equivalent Axial Stiffness of Horizontal Stays. Appl. Sci. 2020, 10, 6263.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop