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Techniques, Materials, and Design Considerations for Strengthening & Repair of Existing Concrete Structures

  • 24 Jan 2017
  • 11:45 AM - 1:00 PM
  • Maggiano's Little Italy North Park
  • 0


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Techniques, Materials, and Design Considerations for Strengthening & Repair of Existing Concrete Structures

Nate Poen - Structural Technologies

    Although the analysis and upgrade of concrete structures is somewhat of a “scientific art” that has been practiced for many years, it has evolved into a complex science that requires a blend of engineering, material science and construction perspectives. Strengthening projects may utilize traditional materials such as conventional cement-based and steel materials as well as advanced composite materials (FRP’s) that are commonly used for aerospace applications. The technique used to design and install these materials for upgrade applications are not common to the engineering and general construction industry which can make strengthening projects even more challenging and complex than new construction.

 There are many factors that create the need for strengthening. They include construction and design errors, increase in live load, new code requirements, low concrete strength, voids created during concrete placement, new penetrations and prevention of progressive collapse from blast loads. This presentation will describe the design strategies, different techniques, materials and design concepts used for upgrading concrete structures which will also be illustrated through actual case studies including two design by Frank Lloyd Wright – Fallingwater and the Guggneheim.


Nate Poen is a Manager, Strengthening Solutions for Structural Technologies. His responsibilities are to aid the contracting and structural engineering communities to formulate value engineered solutions to strengthen existing concrete structures. Structural Technologies primarily works on strengthening existing structures on adaptive reuse or renovation projects and also repairs design/construction defects on ground up jobsites. Prior to his position at Structural Technologies, Nate was a Territory Manager at EFCO Corp. where he aided clients to find engineered concrete formwork solutions in the heavy civil/bridge market. Nate is a Civil Engineering graduate of Iowa State University.

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