Novità

Versione 2014.b

data di pubblicazione:
8 Agosto 2013
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Novità della versione 2014.b

Code implementation. ACI 318M-08 (USA), Nch430.Of2008 (Chile), NTE E.060: 2009 (Peru) and NSR-10 (Columbia)

The tool, Strut3D, was implemented in the 2013.e version, and allows users to check (in CYPECAD and Metal 3D – using the Pile Caps module) pile caps using a general analysis method that analyses the D regions of the reinforced concrete using a strut and tie model. This tool was only available for use with the EHE-08 (Spain) code. Now, with the 2014.b version, the tool has been implemented for use with the following concrete codes:

  • ACI 318M­08 (USA)
    Building Code Requirements for Structural Concrete.
  • Nch430.Of2008 (Chile)
    Norma Chilena oficial NCh430.Of2008.
  • NTE E.060: 2009 (Perú)
    Reglamento Nacional de Edificaciones. Norma E.060 Concreto Armado (2009).
  • NSR­10 (Colombia)
    Reglamento Colombiano de Construcción Sismo Resistente NSR-10. Título C - Concreto estructural.

Improved code application. IS 456: 2000 (India)

Indian Standard. Plain and reinforced concrete code of practice (Fourth Revision).

This code was already implemented in CYPECAD. Now, with the 2014.b version, the time required for the design of the concrete columns has been optimised.

Code implementation. CHOC-08 (Honduras)

Código Hondureño de la Construcción. Normas Técnicas. Capítulo 1. Cargas y fuerzas estructurales. Diseño por Sismo

Implemented in CYPECAD and Metal 3D.

The dynamic analysis method (spectral modal) or static analysis method (equivalent lateral force) proposed by the CHOC-08 can be selected in both programs. The analysis method (dynamic or static) can be selected using the Analysis method option in the dialogue box in which the seismic action is defined.
When the seismic design is carried out using the dynamic analysis method (modal spectral), CYPECAD considers the correction due to base shear.

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

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

The reinforcement ductility criteria and the capacity design criteria for seismic design indicated in CIRSOC-103 2005 were implemented in the 2013.l version. These criteria are applied in CYPECAD when users select CIRSOC 201-2005 and combine it with CIRSOC 103-1991 or CIRSOC 103-2008.

Now, as of the 2014.b version and to calculate the overresistance factors for seismic capacity checks carried out by the Advanced beam editor of CYPECAD, the overresistance moments of the beams are considered at the axes.

Additionally, as of the 2014.b version, the seismic design criteria checks carried out by the Advanced beam editor, and check of the maximum diameter of the continuous reinforcement via internal nodes have been added.

Calculation of the properties of the masonry construction elements

The homogenised values of the properties of the construction elements that are introduced in CYPECAD, to consider their effect in the dynamic analysis of buildings exposed to seismic action, are, as of the 2014.a version: the Thickness of the masonry, Modulus of elasticity X, Modulus of elasticity Y, Shear modulus XY, Poisson’s ratio XY and the Surface load.

All this data is introduced in the Masonry properties – homogenized values – (Beam Definition tab > Loads > Construction elements > Add or Edit option > edit selected type button  or edit type list button  and add ). It is the manufacturers, who due the tests they have carried out on their products, will be able to provide more exact values.

For those cases in which the manufacturers have not provided the required data, a tool has been implemented in the 2014.b version that calculates the homogenised values of the masonry properties based on geometric and resistance data that users can know more easily. This tool is accessed from the previously mentioned dialogue box: Masonry properties – homogenized values, selected using the Property analysis button ().

The properties required by the tool are:

  • Type of construction element
    • Internal partition
    • External wall, visible
    • External wall, to be covered
  • Number of leaves (single or double)
  • Material
  • Type of mortar
  • Type of joint
  • Mortar resistance
  • Standard compressive strength of the unit

In order to define the material, type of mortar, type of joint, mortar resistance and the standard compressive strength of the unit, users must select the adequate option amongst those offered by the program in a drop-down list.

Vertical openings in beams

Implemented in the previous version (2014.a) was the introduction and check of horizontal openings in beams, for dropped rectangular, “L” or “T” sections (without lattice reinforcement) using the Advanced beam editor of CYPECAD and Continuous beams.

Now, with the 2014.b version, vertical openings (rectangular or circular) can be introduced in flat or dropped rectangular, “L” or “T” beams (without lattice reinforcement).

A new option, New vertical opening, has been implemented to introduce the vertical openings, within the Openings dialogue box (Edit a beam from the Results tab of CYPECAD using the advanced beam editor > select the Openings button button of the editor).

The program allows for vertical openings to be introduced in the flanges and webs of flat and dropped beams, as long as the following conditions are met:

  • The transverse dimension of the vertical opening must be less than one third of the width of the web or less than two thirds of the width of the flange, depending on the zone in which the opening is situated.
  • The length of the opening must be less than the width of the web and the depth of the beam.
  • The position of the vertical opening must guarantee that the cover is respected at all the surfaces of the opening.
  • The free distance between a vertical opening and the support of the beam must be greater than the lateral confinement length of the opening.

Furthermore, the free distance between consecutive openings, be they horizontal or vertical, must be greater than two times the depth of the beam and greater than the width of the web of the beam.

Neither horizontal nor vertical openings may be introduced in the confinement zones established in the selected seismic code.

The resulting section of the beam, having applied the reduction due to the presence of the opening, will be checked using the criteria of the selected code as will, besides the reinforcement of the beam, the reinforcement provided in the opening.

The conditions of the position and dimensions of the openings of the horizontal openings can be consulted in the new features of the 2014.a version.

When a vertical opening is introduced and cuts the reinforcement of the frame, the program emits a warning informing users that the arrangement of the reinforcement bars proposed by the program is to be revised, once the opening has been introduced and checked, as there may be a simpler reinforcement arrangement that can be executed on site. Users could even position some of the additional reinforcement bars of the frame in a second layer so the reinforcement arrangement of the opening would be easier to execute.

The remaining edition and check options of the Ultimate Limit States (U.L.S.) of the openings, operate in the same manner as for horizontal openings and can be consulted in the Advanced beam editor. Horizontal openings in beams section in the new features of the 2014.a version.

Please bear in mind that neither the horizontal nor vertical openings are considered during the analysis phase, hence their position and dimensions are restricted (as has been indicated previously in their introduction conditions) so the forces that are obtained can be considered valid.

The reinforcement details of the vertical openings are generated automatically within the details of the frame, in the same way as for horizontal openings.

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).

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