and all previous versions Approved by the AISC Committee on This document, the AISC Seismic Provisions for Structural Steel Buildings (hereafter. All about ANSI/AISC – Seismic Provisions for Structural Steel Buildings, Including Supplement No. 1 by American Institute of Steel Construction. steel special moment frames together with associated lateral drift limits. ANSI/ AISC , Seismic Provisions for. Structural Steel Buildings (AISC a).

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The walls here intersect to create a “C” shape, but individual wall out-of-plane stiffness is ignored and the diaphragms are rigid. To ignore these effects, an additional lateral load case with the same magnitude as the generated load, but with a location exactly at the center of rigidity can be added.

On models with large numbers of load cases or combinations, this could be quite beneficial in terms of time saved and a more comfortable user experience.


Memory and processor speed are the biggest factors for that. Once the environment variables are set via System Properties, Concept should work by double-clicking the Concept icon or Concept data files. Pro, add a section 34-105, new section database.

Details on how to add a section to an existing database is available at.

The center of rigidity can be thought of as the location through which a lateral load would cause lateral deformation of the diaphragm possibly at an angle without causing rotation. Or revert to Ram Connection Bentley Connect Advisor provides links to valuable resources, including training courses, Bentley Communities articles, and YouTube videos.

ANSI/AISC 341-05 – Seismic Provisions for Structural Steel Buildings,…

Consequently, processor clock speeds are more important than the number of processors. Rectification of Defects A number of improvements have been made in the program in areas such as handling of input, removal of defects in calculations for some of the foundation modules, display of output, printing, drawing generation, stability related aspects that resulted in crashes or caused the program to freeze, extensive time taken for analysis of certain modules, etc. However if you still need to add completely separate database for your company, it is possible but you should keep the following points in mind.


Every effort is made to ensure that there are no security risks in the software. The appearance of some parts of the program in this version may differ from that shown in the Tutorial. Civil Engineering Journal has been esoaol as a member of the Crossref. Memory — As a general rule, more memory is better since it serves as a temporary work area when viewing and editing models. The geometry may also looks all wacky spider web or all members can disappear. The requirements of the National Building Code of Canada for the automatic generation of Wind loads, Seismic loads, and Response Spectra Analysis have been implemented.

Run each batch file in the following order, until you find one where Concept runs: Why is more than one center of 341-5 shown on a level?

The higher the level, the more eccentric the center of rigidity. If a model includes columns outside diaphragm and if these columns are elevated, the program incorrectly treated this condition as a sloped diaphragm and calculated large gravity loads on diaphragm.

As such, Bentley encourages the use of bit releases whenever possible. Hence, any torsional effects of the force being offset from the center are implicitly and correctly accounted in the analysis. Frame Story Shear values aiac not be displayed for some walls.

Moving to this sign-in requirement now better facilitates our implementing those new features. Section Database Original Author: Reason If the user deleted one of the joints in the model, the file was getting saved with connection on blank meaning that no data was associated to the connection ID.


One also needs to have read and write access to the Sections folder. Otherwise, this version can be found on the Bentley Software Fulfilment web page by logging into the Personal Portal or the Enterprise Portal and selecting the Software Downloads icon. Potentially conservative moment magnifier was calculated and used. It is used by ProSteel.

Solution Download the file OpenGLenv. Aaisc the Latest Snapshot. Steps to Resolve Install version The checks performed include oneway shear in both plan directions X and Zflexural check for both plan directions X and Zand, punching shear check. This personalized portal gives you access to Usage reports, site configuration information, downloads, and Learning information on 3341-05, seminars and events, and includes a transcript listing the Bentley courses that you have completed.

It can be done using a 2-step approach: If your model consists of just plate elements, define dummy beam elements at the locations where the moving load is supposed to be applied.

Pro license you had — the Standard version or the Advanced version. Previously the option aiac allowed display of values at quarter points. If the solutions discussed above do not work or are not available, try selecting the member in 3D View.

The program now no longer checks this provision for designs made to ACI and later.