Abstract
Following the Chapter 21, Special Moment Resisting Frame provisions put forth by ACI 318-11 will, by definition, result in a code accepted design. However, in some cases, when validating a properly designed frame, drift capacities prove insufficient when compared to drift demands. The research presented herein is the synopsis of an extensive numeric parameter study that examined ACI 318-11 accepted designs for individual columns sized between 12in by 12in to 48in by 48in with varying tie spacing and layouts, 28-day concrete strengths, longitudinal reinforcing ratios, subjected to varying axial loads between zero and the maximum allowed by ACI 318-11. Collected data was compiled and synthesized into non-dimensional curves describing lower bound drift capacities for 2.5 million different cross sections. The curves relate the axial force demand, longitudinal reinforcing ratio with respect to the core, transverse reinforcing ratio, concrete strength, aspect ratio, and drift capacities. The simple curves provide a methodology for quickly limiting the allowed axial force specific to a target drift demand and member aspect ratio; or alternatively, provide a required transverse reinforcing ratio for a specific axial force, aspect ratio, and/or drift demand.
Original language | English (US) |
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DOIs | |
State | Published - 2014 |
Externally published | Yes |
Event | 10th U.S. National Conference on Earthquake Engineering: Frontiers of Earthquake Engineering, NCEE 2014 - Anchorage, United States Duration: Jul 21 2014 → Jul 25 2014 |
Conference
Conference | 10th U.S. National Conference on Earthquake Engineering: Frontiers of Earthquake Engineering, NCEE 2014 |
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Country/Territory | United States |
City | Anchorage |
Period | 7/21/14 → 7/25/14 |
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology