An initial investigation of the inverted trussed beam formed by wooden rectangular cross section enlaced with wire rope

Gesualdo, Francisco Antonio Romero; Lima, Maria Cristina Vidigal de

doi:10.12989/sem.2012.44.2.239

Cited by 2 publications

(1 citation statement)

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“…The simplest system for limiting deformation involves the use of unbonded tendons placed eccentrically on the cross-section. The maximum efficiency is reached by placing tendons externally to the cross-section, as in under-deck cable-stayed beams (Gesualdo and Lima 2012), although these designs are limited by the direct exposure of the metal tendons to fire or by the need of substantial beam heights. Introducing the tensioning components within the cross-section, even though placed as far as possible from its barycenter, enables to use the wooden crosssection as a protective component in the case of fire.…”

Section: Introductionmentioning

confidence: 99%

Application of a New System of Self-Tensioning to the Design of Large-Span Wood Floor Framings

et al. 2016

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This study describes a self-tensioning system in which the gravitational loads acting on a horizontal structural element are automatically converted to a posttensioning force on that component. The self-tensioning effect has a variable intensity, constantly adjusted depending on the applied service loads. The selftensioning is eccentrically applied over the cross-section, and it generates a negative moment that compensates the deformations due to the gravitational loads. The system can be utilized in beams, slabs and structural framings of different materials and can be implemented using different mechanical and hydraulic solutions. The study describes the operation of a mechanical solution for the self-tensioning system and analyzes its behavior in large-span timber floor framings. When combined with conventional pre-tensioning, the selftensioning system notably improves the strength and deformation behavior and permits a design of timber floor framings with a total height of 0.03 times the span length, achieving relative deflections below 1/1000 of the span for the service loads of the structure. Headings Post-tensioning, self-tensioning, prestressing, pre-tensioning, tensioning systems, long-span, timber flooring, wooden structures.

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Section: Introductionmentioning

confidence: 99%