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CYPECAD
Cronologia degli aggiornamenti

CYPECAD

Reinforcement ductility criteria and capacity design criteria for seismic design for Eurocode 8 (EU, France, Portugal and Belgium)

When an analysis is carried out in CYPECAD using any of the indicated seismic design codes, combined with Eurocode 2 (EU), Eurocode 2 (France) and Eurocode 2 (Portugal), the program takes into account the reinforcement ductility criteria and the capacity design criteria for seismic design of the selected seismic code. These criteria are justified in the Ultimate Limit State reports generated by the advanced column and beam editors of CYPECAD.

More information on the combined use of these concrete and seismic codes can be found in the “Eurocode 2 (EU, France and Portugal)” section on this webpage.

Code implementation and improvements in its application. Eurocode 2 (EU, France, Portugal)

Eurocode 2 (EU)
Design of concrete structures. EN 1992-1-1:2004/AC 2008
Eurocode 2 (France)
Calcul des structures en béton. NF EN 1992-1-1:2005/NA: Mars 2007
Eurocode 2 (Portugal)
Projecto de estruturasdebetão. NP EN 1992-1-1:2010/NA

These codes were already implemented as of previous versions. They were also included, in previous versions, in the group of codes which use CYPECAD’s advanced beam editor (which implies that as well as the advantages obtained from using this editor, detailed Ultimate Limit State reports and reinforcement tables can be automatically generated).

Now, as of the 2014.d version, when the selected concrete code is Eurocode 2 (EU), Eurocode 2 (France) or Eurocode 2 (Portugal), beams are edited using CYPECAD’s advanced beam editor. This implies important improvements in the application of these codes:

Detailed U.L.S. and S.L.S. check reports for concrete beams (including check for failure due to torsion)
U.L.S. and S.L.S. reports for steel beams
Graphs and numerical values of the required and effective reinforcement areas
Bar bending diagrams and reinforcement detailing configurations for frame drawings
Design of dropped beams with a variable section
And generally provides a graphical interface to edit the resistance elements of the frame (reinforcement, steel sections, lattices etc.) that is quick and easy to use.

More information can be found in the “Advanced beam editor” section on the webpage dedicated to concrete beams in CYPECAD .

If an analysis with seismic loads is carried out, each one of the Eurocodes; Eurocode 2 (EU), Eurocode 2 (France) and Eurocode 2 (Portugal), has a corresponding set of seismic codes with which it is compatible, and allow for CYPECAD’s advanced column and beam editors to be used, taking into account their capacity design criteria to design concrete beams and columns:

Eurocode 2 (EU)
- Eurocode 8 (EU)
  EN 1998-1. Eurocode 8: Design of structures for earthquake resistance. Part 1: General rules, seismic actions and rules for buildings.
- Eurocode 8 (France)
  NF EN 1998-1/NA (2007) Eurocode 8: Calcul des structures pour leur résistance aux séismes.Partie 1 : Règles générales, actions sismiques et règles pour les bâtiments Annexe nationale à la NF EN 1998-1:2005.1
- Eurocode 8 (Portugal)
  NP EN 1998-1 (2010). Eurocódigo 8 - Projecto de estruturas para resistência aos sismos. Parte 1: Regras gerais, acções sísmicas e regras para edifícios.
- Eurocode 8 (Belgium)
  NBN-ENV 1998-1-1: 2002 NAD-E/N/F Eurocode 8: Conception et dimensionnement des structures pour la résistance au séisme. Partie 1-1: Règles générales. Actions sismiques et exigencies générales pour les structures
- PS 92 (France)
  Règles de Construction Parasismique - Règles PS applicables aux bâtiments – PS 92.
- PS 92 (version révisée 2010) (France)
  Règles de Construction Parasismique - Règles PS applicables aux bâtiments – PS 92 (version révisée 2010).
- RPA 99/v 2003 (Algeria)
  Règles Parasismiques Algériennes RPA 99 / VERSION 2003.
- RPS 2000 (Morocco)
  Règlement de Construction Parasismique.
- RPS 2011 (Morocco)
  Règlement de Construction Parasismique (version révisée 2011).
- 1997 UBC (USA)
  Uniform Building Code.
- 2009 IBC (USA)
  International Building Code.
Eurocode 2 (France)
- Eurocódigo 8 (Francia)
  NF EN 1998-1/NA (2007) Eurocode 8 : Calcul des structures pour leur résistance aux séismes. Partie 1 : Règles générales, actions sismiques et règles pour les bâtiments Annexe nationale à la NF EN 1998-1:2005.1
- PS 92 (France)
  Règles de Construction Parasismique - Règles PS applicables aux bâtiments – PS 92.
- PS 92 (version révisée 2010) (France)
  Règles de Construction Parasismique - Règles PS applicables aux bâtiments – PS 92 (version révisée 2010).
- RPA 99/v 2003 (Algeria)
  Règles Parasismiques Algériennes RPA 99 / VERSION 2003.
- RPS 2000 (Morocco)
  Règlement de Construction Parasismique.
- RPS 2011 (Morocco)
  Règlement de Construction Parasismique (version révisée 2011).
- 1997 UBC (USA)
  Uniform Building Code.
- 2009 IBC (USA)
  International Building Code.
Eurocódigo 2 (Portugal)
- Eurocode 8 (Portugal)
  NP EN 1998-1 (2010). Eurocode 8 - Projecto de estruturas para resistência aos sismos
  Parte 1: Regras gerais, acções sísmicas e regras para edifícios.
- 1997 UBC (USA)
  Uniform Building Code.
- 2009 IBC (USA)
  International Building Code.

The concrete and seismic codes that are available for the capacity design criteria for concrete columns and beams can be found in the “Capacity design criteria for seismic design of concrete columns and beams” section on the CYPECAD webpage.

More information can also be found in the “Design codes available for use with the Advanced beam editor” section on the Concrete beams webpage.

Code implementation. ABNT NBR 6118 Projeto Junho 2013 (Brazil)

Projeto de estruturas de concreto - Procedimento.

This document is a project revision of the ABNT NBR 6118 2007 code, which is currently not in force, however it is foreseen that it will substitute the current standard.

It has been implemented in CYPECAD (including Strut3D) and Metal 3D.

Averaging of required reinforcement areas in slabs

Two new options have been implemented in the Contour Maps tab so the average values of the forces, design forces or steel areas of flat slabs and waffle slabs can be consulted. The mid-way value between two points or average values of a strip can be viewed in either reinforcement direction of the slab.

Improvements in the edition of beam assembly reinforcement tables

The edition of beam assembly reinforcement tables has been improved (Job ˃ General data ˃ By position button ˃ Beam options ˃ Beam reinforcement tables ˃ select any of the three assembly reinforcement tables). Now, the creation of new table entries, the creation of new stirrup arrangements, the visualisation and modification of the width and depth intervals for which each reinforcement arrangement is available in the table, are carried out in the same dialogue box without successive windows appearing.

Please recall that the edition of the reinforcement tables that has been indicated is only available for codes which can use the Advanced beam editor.

Representation of the reinforcement when editing openings

A transverse section of the beam is represented in the zone of the opening with the reinforcement arrangement, within the edition or introduction dialogue boxes of vertical or horizontal beam openings (edit a beam from the Results tab of CYPECAD using the Advanced beam editor ˃ select the button of the editor ˃ select any of the edition or introduction options for openings).

Seismic analysis. Fundamental period of the structure with user values for CFE 2008 and NTC 2004 Mexican design codes

CYPECAD allows users to define the Fundamental period of the structure (used to calculate the base shear) in two ways:

Based on the code (only way possible in previous versions)
Specified by the user (implemented in the 2014.c version)

Either of the two options can be selected in the section Estimation of the fundamental period of the structure within the Code for the calculation of seismic loading dialogue box (General data ˃ Select “with seismic loading” from the “Loads” section ˃ select Mexico as the country and CFE 2008 or NTC 2004).

The value of the fundamental period of a building must be obtained based on the properties of its seismic resistance system, in the direction being considered, in accordance with structural dynamic principles. Alternatively, most seismic codes allow for the fundamental period to be estimated:

Using empirical formulas provided within their articles
Using other methods, as long as these are adequately sustained analytically or experimentally

The estimated fundamental period is applied in the calculation of the static shear at the base of the structure (base shear) which:

Adjusts the dynamic results to minimum values prescribed in the code, if the dynamic method is applied
Generate the distribution of the equivalent static lateral forces, if the static method is applied

Article 3.3.5.1 of the CFE 2008 code establishes the calculation of the base shear force by taking the bottom period limit of the plateau of the design spectrum (Ta) as the estimated fundamental period; and article 8.1 of the NTC-2004 code takes any period which coincides with the design spectrum plateau (Ta ≤ T ≤ Tb).

The indicated values are limits established in the codes that can be used in the absence of more precise data. If users have values of the fundamental period which are more adjusted to their structure (calculated using their methods or using software such as CYPECAD, which calculates the fundamental period of the structure in each direction – the values can be consulted after the analysis in the “Justification of seismic action report”: File ˃ Print job reports), they may specify them by selecting the Specified by the user option, located in the Code for the calculation of seismic loading dialogue box, as has been indicated previously.

Code implementation and improvements in its application. CIRSOC 103-2005 (Argentina)

Normas Argentinas para Construcción Sismorresistente. Parte II: Construcciones de Hormigón Armado.

This code was already implemented in CYPECAD as of the 2013.l version in order to be able to use the Reinforcement ductility criteria and the Capacity design criteria for seismic design which are to be used with the concrete code: CIRSOC 201-2005 (Reglamento Argentino de Estructuras de Hormigón).

Now, for the 2014.c version, the following checks have been included:

Compliance with article 2.2.9.2
For the capacity check of concrete columns, the design axial force specified in article 2.3.5 is used

Please recall that users do not select the CIRSOC 103-2005 code to be applied. The combination of the CIRSOC 201-2005 concrete code together with seismic code CIRSOC 103-1991 (current seismic code in force in Argentina) or together with seismic code CIRSOC 103-2008 (project seismic code which will substitute CIRSOC 103-1991) implies the reinforcement ductility criteria and capacity design criteria for seismic design of CIRSOC 103-2005 be applied.

Code implementation and improvements in its application. CFE 2008 (Mexico) and NTC 2004 (Mexico)

CFE 2008 (Mexico)
Manual de Diseño de Obras Civiles. Diseño por Sismo
NTC 2004 (Mexico)
Normas Técnicas Complementarias para Diseño por Sismo

These codes were already implemented in CYPECAD and Metal 3D as of previous versions. Now, in the 2014.c version, CYPECAD offers two options to indicate the value of the Fundamental period of the structure (used to calculate the base shear):

In accordance with the code (only way possible in previous versions)
User specified (implemented in the 2014.c version)

More information can be found in the section on: “Seismic analysis. Fundamental period of the structure with user values for CFE 2008 and NTC 2004 Mexican design codes” in the new features of CYPECAD of this webpage.

Export to Tekla Structures (CYPECAD and Metal 3D)

The 2014.b version of CYPECAD and Metal 3D allows for the export of jobs to versions 18 and 19 of Tekla Structures.

Move tendon anchorages

A new option Move anchorages, has been implemented in the Post-tensioned dialogue box (Beam Definition tab or Results tab > Post-tensioned > Post-tensioned > Move anchorages) which allows users to move the anchorage in the direction of the tendon (by selecting the anchorage to be moved with the left mouse button) or move the both anchorages and the tendon perpendicularly to it (if any part of the tendon, except its ends, is selected).

Analysis time optimisation during the design of columns using the IS 456: 2000 code (India)

The time required to design the concrete columns, especially using the IS 456: 2000 Indian code, has been optimised.

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