Technical Papers

Direct Analysis Method for AISC 13th Edition (160 KB)

Description: This downloadable file contains a white paper on the practical ramifications of the analysis requirement in the AISC 13th edition. It also contains the power point presentation that RISA gave at the 2007 NASCC show regarding these analysis requirements. Finally, you will also find two RISA-3D models of the Benchmark problems mentioned in the commentary to Direct Analysis Method that are used to assess the accuracy of the 2nd order analysis procedure used by RISA.

Finite Element Considerations for Computer Modeling of Mat Foundations (132 KB)

Description: This downloadable file contains a white paper on the modeling of mat foundations in finite element analysis software. It compares the results from multiple foundation software programs and talks about the key components to accurately model these foundation elements.

Analysis Requirements of the 2006 IBC (9.7 MB)

Description: This downloadable file contains a PDF copy of a Power Point presentation on the analysis requirements of the 2006 IBC.  Included in this are summaries of the AISC, ACI and ASCE-7 analysis requirements. In addition, there are simple hand calculation methods given for estimating the second order P-Delta effects. Also given are simple criteria for determining if a structure should be considered part of a sway or non-sway frame.