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Seismic Design for Ecconcentrically Braced Frames Based on IBC & AISC Seismic Spreadsheet

Seismic Design for Eccentrically Braced Frames (EBFs) Based on IBC & AISC Standards

Eccentrically Braced Frames (EBFs) are a popular structural solution for buildings in seismic regions due to their energy-dissipation capacity and ductility. According to the International Building Code (IBC) and American Institute of Steel Construction (AISC) Seismic Provisions, EBFs combine the stiffness of braced frames with the ductility of moment frames.

Designing EBFs per IBC and AISC requirements involves selecting frame geometry and materials that meet seismic load demands, providing reliable lateral resistance while managing structural forces. The IBC requires EBFs to be designed to ensure stability under extreme conditions, with clear specifications for load combinations and detailing. The AISC Seismic Provisions complement these guidelines, outlining requirements for link beams that dissipate energy during an earthquake, helping to prevent structural damage.

Together, IBC and AISC provide a robust framework for the safe, effective design of EBFs, offering enhanced resilience in earthquake-prone areas.

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Ponding Analysis For Low Slope Or Flat Roof Systems Spreadsheet

“Ponding Analysis For Low Slope Or Flat Roof Systems” is a spreadsheet program written in MS-Excel for the purpose of analysis for ponding for low slope or flat roof systems in structural steel per the AISC 9th Edition (ASD) Code, pages 5-83 to 5-84 and 5-175 to 5-179. Specifically, simplified checks are performed for the steel members as well as the steel deck. A rigorous analysis, whether actually required or not, is also performed for the steel members.

This program is a workbook consisting of two (2) worksheets, described as follows:

Doc – Documentation sheet
Ponding – Ponding analysis per AISC 9th Edition (ASD) Manual

All the worksheets are independent and self contained, so that you can move them from one workbook to another. All the worksheets are protected, but not with a password.

Program Assumptions and Limitations:

1. This program utilizes the equations in AISC Code Sect. K2 to perform a simplified check on the primary and secondary members, as well as the steel roof deck.

2. This program also performs a rigorous analysis on the primary and secondary members utilizing the equations in AISC Code Commentary Sect. C-K2.

3. This program contains numerous “comment boxes” which contain a wide variety of information including explanations of input or output items, equations used, data tables, etc. (Note: presence of a “comment box” is denoted by a “red triangle” in the upper right-hand corner of a cell. Merely move the mouse pointer to the desired cell to view the contents of that particular “comment box”.)

Calculation Reference
AISC

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Bracing Connection Capacity At Middle Of Beam Based on AISC Manuel 13th Edition Spreadsheet

A beam or column that relies on adjacent structural members for support is braced in a lean-on system. Structural members that are tied or linked together such that buckling of the member would require adjacent members to buckle with the same lateral displacement characterize lean-on systems.

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8-Bolted Stiffened End Plate for SMF Based on AISC Code Spreadsheet

The eight bolt stiffened (8ES) EEP connection is one of the prequalified moment connections in the AISC 358 standard for special moment frames (SMFs) in seismic regions. In this connection, a stiffener plate is welded between the end plate and the beam flanges to strengthen the extended portion of the end plate.

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