Seismic Assessment and Retrofit of Existing RC Buildings: Case Studies from Degenkolb Engineers

Insung Kim, Project Engineer, Degenkolb Engineers, San Francisco, CA
ACI Committee 369 is working with ASCE Committee 41 on the state of the art of seismic assessment of reinforced concrete buildings. These sessions will present potential updates for ASCE 41 and summarize work done by committee members on modeling parameters and acceptance criteria for concrete components, including columns, joints, and walls. Example applications of ASCE 41-13 to existing concrete buildings will also be presented. This session will be of value to practicing engineers engaged in seismic retrofit projects using ASCE 41.

[@ameerbakheet6645]

First, where do you place the paper retarder, is it directly below the slab on grade concrete or below the soil subbase layer?
Second, there has been recommendations not to place the paper retarder directly below the slab on grade concrete when the slab on grade is used to resist horizontal loads as it will reduce it capacity to resist that load due to low friction; the case of a basement wall is a typical example of that case

[@bsghai]

Great Presentation.

[@ahsanhabib8171]

Great