Title:
Concrete Q&A: Evaluation and strengthening of members in existing structures
Author(s):
Publication:
Concrete International
Volume:
39
Issue:
5
Appears on pages(s):
71-72
Keywords:
DOI:
10.14359/51700756
Date:
5/1/2017
Abstract:
Q. I am the licensed design professional (LDP) for a team conducting a structural evaluation of a reinforced concrete building that was completed in the mid-1960s. We’ve determined that many elements in the floor structures do not comply with requirements in the ACI 318-14 Code.1 For example, shallow beams have stirrup spacing exceeding d/2, and deep beams do not satisfy ACI 318-14 requirements for horizontal and vertical reinforcement areas and spacing. To compound these issues, the floor live load is being increased due to a change in use. Are there any ACI Code provisions that address these issues?
Related References:
1. ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-14) and Commentary (ACI 318R-14),” American Concrete Institute, Farmington Hills, MI, 2014, 519 pp.
2. ACI Committee 562, “Code Requirements for Assessment, Repair, and Rehabilitation of Existing Concrete Structures (ACI 562-16) and Commentary,” American Concrete Institute, Farmington Hills, MI, 2016, 96 pp.
3. “Guide to the Code for Assessment, Repair, and Rehabilitation of Concrete Buildings (MNL-3(16)),” second edition, American Concrete Institute, Farmington Hills, MI, 2016, 176 pp.