The possibility to add comments to the project has been implemented. The comments are managed in the “Job description” dialogue box (File > Job description).
The comments users add can be included in the Project report. This improvement allows, for example, users to manage a history of comments, modifications or revised versions of the project.
Decree 945 of 5 June 2017 published by the Ministry of Housing, City and Territory of the Republic of Columbia partially modifies the “Reglamento Colombiano de Construcción Sismo Resistente NSR-10”.
In the 2018.c version of CYPE programs, the changes indicated in this decree, which affect CYPECAD and CYPE 3D, have been implemented. These changes allow users to select certain municipalities that were previously omitted in the NSR-10 Regulation.
The municipalities that have been added are: Norosí (Bolívar), Guachené (Cauca), San José de Uré (Córdoba), Tuchín (Córdoba), Nariño (Nariño) and Coveñas (Sucre).
As of the 2018.a version, CYPE 3D includes the analysis, design and check of prequalified connections in accordance with ANSI/AISC 358-10 (Prequalified Connections for Special and Intermediate Steel Moment Frames for Seismic Applications) and ANSI/AISC 341-10 (Seismic Provisions for Structural Steel Buildings).
Prequalified connections are applied to Special Moment Frames (SMF) and Intermediate Moment Frames (IMF) as indicated in the ANSI/AISC 341-10 code.
It is possible to define prequalified connections in projects in which the rolled and welded steel code: ANSI/AISC 360-10, has been selected.
Implemented prequalified connections
The prequalified connections that have been implemented in the program are:
Nodes with interaction of several beams
Column-beam prequalified connections can be part of a node interacting with connections of other beams, which can or cannot be prequalified connections. For example:
Checks and drawings
As well as the checks carried out on the connection in accordance with the ANSI/AISC 360-10 rolled steel code, specific checks of the ANSI/AISC 341-10 and ANSI/AISC 358-10 codes are carried out. The check report displays the chapter of the code in accordance which the check is performed.
Operation in CYPE 3D
For CYPE 3D to carry out the analysis, design and check of prequalified connections of columns and beams, the following conditions must be met:
When the type of earthquake-resistant system is assigned to columns and beams, it is also possible to:
As of the 2018.a version, CYPE 3D allows for the main specifications and requirements linked to the three most common seismic resistant systems defined in the American AISC 341-10 code (Seismic Provisions for Structural Steel Buildings) to be included in the design of welded and rolled steel structural elements:
Also implemented is the analysis, design and check of Prequalified Connections in accordance with the ANSI/AISC 358-10 and ANSI/AISC 341-10 codes. The design and check of Prequalified Connections are exposed in detail in the section on “Prequalified connections in accordance with ANSI/AISC 358-10 and ANSI/AISC 341-10” of this webpage. These connections are applied to earthquake-resistant systems composed of “Moment-resisting frames”.
The following sections describe the three earthquake-resistant systems that are contemplated and the types into which they are sub-divided. The checks carried out by CYPE 3D for each type of system are described in the “Checks carried out” section of the “CYPE 3D, Earthquake-resistant systems in accordance with ANSI/AISC 341-10, and prequalified connections in accordance with ANSI/AISC 358-10 and ANSI/AISC 341-10” webpage, which will be available shortly.
Moment-resisting frames
Unbraced frames or moment-resisting frames are an assembly of straight beams and columns connected to one another with welds, bolts or both. The bars making up these frames are mainly exposed to bending moments and shear forces, which control their design.
The specifications of AISC 341-10 consider three types of moment-resisting frames in accordance with the grade of ductile behaviour considered in the design. The fundamental difference between them is that they are designed with different energy dissipation levels:
Frames with concentric bracing
This type of structure is characterised because the central axes of the component structural members are cut at a point, forming a grid-like structure. This is why lateral actions mainly induce axial forces in the bars of the braced frame.
The specifications of AISC 341-10 consider two categories for concentrically braced frames depending on the expected performance level:
Frames with eccentric bracing
In eccentrically braced frames, axial forces induced in the braces are transferred via shear forces and moments in segments of a reduced length (e), called links, where energy, due to creep of the steel, is dissipated. The links represent “structural fuses”, which should be detailed adequately to avoid local buckling and other instability phenomena from degrading the response.
The specifications of AISC 341-10 consider a single category of frames with eccentric bracing:
Assignment of earthquake-resistant systems in CYPE 3D
Users can assign earthquake-resistant properties to a bar using the “Earthquake-resistant system” option of the “Bar” menu. This option is only available if the selected rolled steel code is “ANSI/AISC 360-10”.
Users can freely assign the earthquake-resistant properties to bars and in accordance with their own criteria. Logically, it should be coherent with the geometry of the frame.
Bars that have been assigned earthquake-resistant systems must be rolled or welded steel bars and be defined as Generic bars, Columns or Beams.
Norma Brasileira ABNT NBR 6118 (2014). Projeto de estruturas de concreto – Procedimento.
Implemented in Embedded retaining walls and Reinforced concrete cantilever walls. This code was already implemented in CYPECAD, CYPE 3D and other CYPE programs.
As of the 2017.i version, CYPECAD and CYPE 3D allow users to work on several projects simultaneously.
Once a project has been opened in CYPECAD or CYPE 3D, users can access the general program menu to open another file of these programs and work on it or on both projects at the same time.
This allows users to, for example, edit the results of a structure that has already been analysed or introduce a new structure whilst another is being analysed. It is even possible to analyse several projects at the same time. The number of executions is not limited.
There is one limitation, it is not possible to keep the same file open more than once.
Código Reglamentario para el municipio de Puebla (2003). Implemented in CYPECAD and CYPE 3D.
As of previous versions, when users selected to carry out a seismic analysis with the NSR-10 code (Colombia), they could choose amongst several microzonations:
As of the 2017.e version, the Microzonation of Cali of 2014 has been included (Decree 411.0.20.0158 of 2014).
