Title:
Quantification of Reliability for Concrete Elements with Demand-Capacity Ratios Greater than One
Author(s):
Gene R. Stevens, F. Michael Bartlett, Ming Liu, Keith E. Kesner, and Gaur Johnson
Publication:
Concrete International
Volume:
41
Issue:
4
Appears on pages(s):
55-61
Keywords:
member, probability, design, safety
DOI:
10.14359/51715677
Date:
4/1/2019
Abstract:
The article quantifies approximately the reliability indices and associated probabilities of failure for the critical demand-capacity ratios (U/R) provided in Chapter 4 and Appendix A of ACI 562-16. The goals are to inform users of the ACI 562 standard about the impact of these ratios on structural safety, provide insight on how the ratios were developed, and demonstrate the reduction in structural reliability as U/R increases from 1.0 to 1.5.
Related References:
1. ACI Committee 562, “Code Requirements for Assessment, Repair, and Rehabilitation of Concrete Buildings (ACI 562-16) and Commentary,” American Concrete Institute, Farmington Hills, MI, 2016, 86 pp.
2. 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.
3. Madsen, H.O.; Krenk, S.; and Lind, N.C., Methods of Structural Safety, first edition, Prentice-Hall Inc., Englewood Cliffs, NJ, 1986, 403 pp.
4. “Minimum Design Loads for Buildings and Other Structures (ASCE 7-16),” American Society of Civil Engineers (ASCE), 2016, Reston, VA.
5. Nowak, A.S., and Szerszen, M.M., “Calibration of Design Code for Buildings (ACI 318): Part 1—Statistical Models for Resistance,” ACI Structural Journal, V. 100, No. 3, May-June 2003, pp. 377-382.
6. Stevens, G.R., and Kesner, K.E., “Evolution of the ACI 562 Code—Part 2,” Concrete International, V. 38, No. 3, Mar. 2016, pp. 49-53.