Design of Prestressed Skin–Flange Assembly
نویسنده
چکیده
A prestressing procedure for reduction of adhesive peel and shear stresses at the leading edge of a skin–flange assembly is analyzed for tensile and bending loads applied to the skin. Both an analytical solution based on the Green’s functions and a finite element solution are presented for specific examples, together with design diagrams. Substantial shear and peel stress reductions are obtained with the proposed procedure.
منابع مشابه
Stress Redistribution in Skin/Flange Assemblies
A prestressing procedure is proposed for reduction of stress concentrations at the leading edges of adhesive bondlines in composite skin/ ange assemblies. A niteelementanalysisof a speci c geometryof such an assembly is presented,whichaccounts for nonlinear viscoelastic deformation of the adhesive. Design diagrams based on elastic analysis are constructed for evaluation of prestress forces ...
متن کاملEvaluation and Modifications of the AASHTO Procedures for Flexural Strength of Prestressed Concrete Flanged Sections
Different interpretations of the equivalent rectangular stress block approximation used by the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) and AASHTO Standard Specifications may lead to inconsistencies in the sectional response of the prestressed concrete flanged sections predicted by the two specifications. According to t...
متن کاملCOMPARATIVE COSTS OF THE PRODUCTION, TRANSPORT AND ASSEMBLY STAGES OF PRESTRESSED PRECAST SLABS USING GENETIC ALGORITHMS
In the precast structures, optimization of structural elements is of great interest mainly due to a more rationalized way that elements are produced. There are several elements of precast prestressed concrete that are objects of study in optimization processes, as the prestressed joist applied in buildings slabs. This article inquires into cost minimization of continuous and simply supported sl...
متن کاملDuctility Evaluation of Prestressed Concrete Members
In this paper, moment-curvature behavior and ductility of prestressed concrete members based on nonlinear analysis is investigated. Influence of various design parameters on ductility of flexural members is determined according to appropriate materials models for stress-strain curves of concrete, prestressing steel and conventional reinforcements. Parameters studied include reinforcing index (ω...
متن کاملField and Laboratory Study of the Mn/DOT Precast Slab Span System
The Minnesota Department of Transportation (Mn/DOT) Precast Slab Span System was initially designed by Mn/DOT with input from University of Minnesota researchers and local fabricators. The bridge system consisted of a series of precast, prestressed concrete inverted tee bridge elements which also served as stay-in-place formwork for the cast-in-place portion of the deck placed in the field. One...
متن کامل