WEBINAR ON SEISMIC PERFORMANCE OF COLD-FORMED STEEL NONSTRUCTURAL WALLS DETAILED WITH MOVEMENT JOINTS IN THE 10-STORY TALL WOOD BUILDING EXPERIMENT

February 20, 2025 | 3:00 p.m. Eastern

Continuing Education - 1.5 PDHs / 1.5 LU|HSW

Presentation Outline

To advance resilient seismic solutions for tall wood buildings, a shake table test program of a full-scale 10-story building with mass timber rocking walls was conducted in 2023 at the NHERI@UC San Diego outdoor shaking table. An essential aspect of building resilience is assurance that nonstructural components (e.g. nonstructural walls, facades, ceiling, piping and egress) sustain minimal damage or are easily repairable. The test specimen included a variety of cold-formed steel-framed interior walls and exterior façade assemblies that were detailed to accommodate inter-story movement with horizontal slip joints and vertical expansion joints. The design intent was to protect the walls from damage by isolating them from the movement. For the most part, the walls performed well and minimal visible damage was observed. However, the performance of various slip joints was far from perfect, and several challenges were encountered in scaling up the details from an idealized laboratory setting to a full-scale structure. Follow-up analytical studies have focused on whether basic friction models can be used to predict slip across the slip joints and subsequent drift reduction in the walls. This presentation will overview the philosophy in selecting the subassemblies, the component details, the observed performance, the highlights of the modeling efforts, and the synthesis of takeaways for the profession.

Webinar Materials

• Presenter’s notes
• Evaluation Form
• Attendance Form

Register Today

Who Should Attend?

This webinar is for architects, engineers, building officials and contractors.

Format

Web-based seminar using "Go To Meeting" technology.

Duration

 1+ hour of lecture, followed by discussion and questions. (1.5 hours total).

Cost

Presenter

Keri L. Ryan
Professor of Civil Engineering (Structural and Earthquake Engineering)
University of Nevada, Reno

Keri Ryan is the E.W. McKenzie Foundation Endowed Professor and Department Chair at the University of Nevada, Reno. She specializes in earthquake engineering and protective systems for high seismic performance, with application to buildings and bridges. She was the PI of the U.S. National Science Foundation funded “Tools for Isolation and Protective Systems” (or TIPS) project to address impediments to the wider application of seismic isolation systems, during which she observed firsthand the performance issues related to nonstruc-tural components. She has been collaborating with the NHERI Tallwood team since 2016 to develop and validate a resilience-based design methodology for a new class of structural systems using mass timber rocking wall systems that consider the important contributions of nonstructural components.