Author Archives : Abby Enscoe, P.E.

About the author ⁄ Abby Enscoe, P.E.

Abby Enscoe (a.enscoe@tippingstructural.com) is an Associate at Tipping Structural Engineers in Berkeley, CA.

FRP Column Retrofit for Mt. Zion Housing

Part 2

A recent seismic retrofit project provided an opportunity to test an interior concrete column retrofit with a three-sided, fiber-reinforced polymer (FRP) wrap with FRP through-anchors on the fourth side. The testing demonstrated the effectiveness of this application, which could be applied to columns or beams with deficient shear strength in situations where site conditions prevent access to one side of the member. Please refer to Part 1 (STRUCTURE, January 2022) for additional testing information.

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Feb, 2022 By Abby Enscoe, P.E., Marc Steyer, S.E., Aniket Borwankar, Mike Wesson, S.E., Ph.D., Lawrence Burkett, Joe Maffei, S.E., Ph.D. and Rachel Cohen, P.E. In Structural Performance Comments 0

Shear Strength Deficiencies in Concrete Columns

Part 1

Concrete buildings with vulnerable columns are some of the most dangerous structures when earthquakes occur. Since the 1970s, building codes have addressed the detailing of columns that are part of moment frames in high-seismic regions. Research for the Portland Cement Association [Blume et al., 1961] and subsequent studies in New Zealand established the need for close spacing of ties and a capacity design of frame members for shear strength sufficient to cause flexural yielding rather than undesirable shear failure.

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Jan, 2022 By Lawrence Burkett, Joe Maffei, S.E., Ph.D., Abby Enscoe, P.E., Marc Steyer, S.E., Mike Wesson, S.E., Ph.D. and Aniket Borwankar In Structural Performance Comments 0

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