The flexibility matrix o timber composite beams with a discrete connection system

Fernández Cabo, José Luis and Díez Barra, Rafael and Fernández Lavandera, Jorge and Ávila Jalvo, José Miguel (2011). The flexibility matrix o timber composite beams with a discrete connection system. In: "CIMAD 11, 1º Congresso Ibero-LatinoAmericano da Madeira na Construção", 07/06/2011 - 09/06/2011, Coimbra, Portugal.

Description

Title: The flexibility matrix o timber composite beams with a discrete connection system
Author/s:
  • Fernández Cabo, José Luis
  • Díez Barra, Rafael
  • Fernández Lavandera, Jorge
  • Ávila Jalvo, José Miguel
Item Type: Presentation at Congress or Conference (Article)
Event Title: CIMAD 11, 1º Congresso Ibero-LatinoAmericano da Madeira na Construção
Event Dates: 07/06/2011 - 09/06/2011
Event Location: Coimbra, Portugal
Title of Book: Actas del CIMAD 11, 1º Congresso Ibero-LatinoAmericano da Madeira na Construção
Date: 2011
Subjects:
Faculty: E.T.S. Arquitectura (UPM)
Department: Estructuras de Edificación [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This work presents a method for the analysis of timber composite beams which considers the slip in the connection system, based on assembling the flexibility matrix of the whole structure. This method is based on one proposed by Tommola and Jutila (2001). This paper extends the method to the case of a gap between two pieces with an arbitrary location at the first connector, which notably broadens its practical application. The addition of the gap makes it possible to model a cracked zone in concrete topping, as well as the case in which forming produces the gap. The consideration of induced stresses due to changes in temperature and moisture content is also described, while the concept of equivalent eccentricity is generalized. This method has important advantages in connection with the current European Standard EN 1995-1-1: 2004, as it is able to deal with any type of load, variable section, discrete and non-regular connection systems, a gap between the two pieces, and variations in temperature and moisture content. Although it could be applied to any structural system, it is specially suited for the case of simple supported and continuous beams. Working examples are presented at the end, showing that the arrangement of the connection notably modifies shear force distribution. A first interpretation of the results is made on the basis of the strut and tie theory. The examples prove that the use of EC-5 is unsafe when, as a rule of thumb, the strut or compression field between the support and the first connector is at an angle with the axis of the beam of less than 60º.

More information

Item ID: 12492
DC Identifier: http://oa.upm.es/12492/
OAI Identifier: oai:oa.upm.es:12492
Deposited by: Memoria Investigacion
Deposited on: 08 Aug 2012 10:43
Last Modified: 11 May 2020 06:37
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