June 14, 2022

Case Study: SCC Beatrice Academic Excellence Center

Learn how Olsson utilized the entire RISA Suite (RISA-3D, RISAFloor, RISAFoundation and RISAConnection) to design the newest addition to the Southeast Community College campus located in Beatrice, NE.

To learn more visit the project case study page:

SCC Beatrice Academic Excellence Center

Tags: RISA, New, News, Case Study

December 17, 2021 | ADAPT-Builder, ADAPT, New Release, New, Deflection, Long Term Deflection

Automatic Calculation of Long-Term Load Factors in ADAPT-Builder

With the release of ADAPT-Builder v21, users now has the option to have the program automatically calculate long-term load factors using two different methodologies. Calculation of Long-Term Load Factors is available using all design codes but is implemented based on ACI 209. When calculating these factors, either the Detailed Calculations Method (ACI 209) or the ACI Multiplier Method can be selected. When using the Detailed Calculations method, the program considers the following factors when determining the factors to apply to the long-term combinations created by the user. Creep Shrinkage Type & Duration of Curing Date of Load Application Deflection Observation Day When using the ACI Multiplier method, the program interpolates the long-term multiplier entered by the user based on the day deflection is observed. To access the feature, a new Long-Term Deflection Settings option is available under the criteria menu. Selecting this option opens the Long-Term Settings window. Users are then presented with the option to select from the two methodologies mentioned above. Detailed Calculation (ACI 209) The use of the Detailed Calculations (ACI 209) is typical when sustained loads are applied in stages. The program uses the user inputs from the Long-Term Deflection Settings window to calculate the creep…

March 27, 2013 | RISA-3D, Loads, RISA-2D, Load Combinations, New

Nesting Load Combinations

The Load Combinations spreadsheet in RISA-3D is limited to ten columns of BLC and Factor combinations. However, there are times where you may need to include additional entries to your Load Combination. To do this, you can simply “nest” your load combinations. This means that if you need more than eight BLC entries in a single load combination, you can define the common BLCs (such as Self Weight, DL, and/or LL) in one load combination that you can then reference in the other load combinations. Entering “Lnn” in the BLC field will include all the BLCs (and their factors) from the load combination on line “nn” of the spreadsheet, thereby “nesting” the combination. This can also be used to simplify your input. For instance, you may have a model that needs to combine the effects of static loads and moving loads, or static loads and the Response Spectra results, but because of space limitations in the spreadsheet, it is impossible to fit them all into one row. Additionally, while investigating the performance of a structure, you may need to multiple entire load combinations by a "safety factor". In this example, the load combination (L22) is given additional factoring and has…

December 17, 2021 | ADAPT-Builder, Loads, ADAPT, New Release, Load Combinations, New

Load Combination Generator in ADAPT-Builder

With the release of ADAPT-Builder v21, a new load combination generator (LC Generator) provides users the option to automatically generate code compliant load combinations for use in the analysis and design of an ADAPT-Builder model. Included in this feature, is the ability to include automatic reversal of seismic and/or wind loads. In addition, the LC Generator includes options to add ASCE compliant combinations for the ACI code. The LC Generator is implemented for all design codes available within ADAPT-Builder. ASCE specific combination options are available for all ACI codes with the exception of ACI 318-99. By default, the new LC Generator gives users the following options (which can be enabled or disabled) when automatically generating required design code combinations: Design State: ULS (Strength Level) or SLS (Serviceability Level) Combinations Reversible: When selected, two combinations for each wind/seismic load combination will be created (each with opposite signage) ASCE Combinations: Combinations based on ASCE 7 with specific options for bi-directional and eccentric load combinations Vertical/Horizontal Seismic Load Effects: Application of Vertical/Horizontal seismic load effects according to ASCE 7 12.4.2.3 Example The default load combinations (gravity) included by the program when the ACI 318-19 design code is selected are as follows: Select the…