CHAPTER 10 - 1 CHAPTER 10 ULTIMATE LIMIT STATES DESIGN Article 41. Equilibrium Limit State It should be verified that the equilibrium limits (overturning, sliding, etc.), are not exceeded under the least favourable loading hypothesis, applying the Rational Mechanical Methods, and taking account of the actual conditions of the supports. E d,estab ≥ E in which: d,desestab E d,estab E The effects of stabilising actions design value. d,desestab Article 42. Limit State at Failure under normal stresses The effects of destabilising actions design value. 42.1 General design principles 42.1.1 Definition of the section 42.1.1.1 Dimensions of the section In order to obtain strength capacity of a section, this shall be considered using its actual dimensions during the construction or service stage analysed, apart from in the case of T- beams, I-beams or similar members, when the actual widths indicated in 18.2.1 shall be taken into consideration. 42.1.1.2 Resistant section For the purposes of the calculations for Limit State at Failure under normal stresses, the resistant section of concrete shall be obtained from the dimensions of the member and in compliance with the criteria in 40.3.5. 42.1.2 Basic hypotheses The design of the ultimate strength capacity of sections shall be conducted on the basis of the following general hypothesis: a) Failure is characterized by the value of strain in specified fibres of the section, defined by the failure deformation envelopes detailed in 42.1.3. b) Strain in concrete follows a plane law. This hypothesis is valid for members in which the ratio between the distance between points of zero moment and the total depth is more than 2. c) The strain ε s The total strain in the active stress in bonded active reinforcements shall take account, not only of the strain that occurs in the corresponding fibre in the plane of strain at failure (ε in passive reinforcements remains equal to that of the concrete surrounding them. 0 ), but also the strain produced by the pre-
ULTIMATE LIMIT STATES DESIGN
May 19, 2023
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