Appropriate Overstrength of Shear Reinforcement in Precast Concrete Diaphragms
Publication: Journal of Structural Engineering
Volume 133, Issue 11
Abstract
Current precast concrete diaphragm design may not necessarily protect the diaphragm from a nonductile shear failure in an overload situation. As evidence exists that diaphragms can attract large inertial loads during strong ground motion, emerging design methodologies are aiming to develop the diaphragm flexural strength. However, the performance target desirable or achievable in design may depend on a number of other factors. An analytical study examines the performance of precast diaphragms with different shear strength relative to design (flexural) strength, termed here “shear reinforcement overstrength.” The objective of the study is to determine the required shear reinforcement overstrength in the precast diaphragm to produce certain performance targets. Appropriate shear reinforcement overstrength design factors are proposed in terms of a number of key parameters related to diaphragm geometry and the properties of the diaphragm reinforcing details.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This research is being supported by the National Science Foundation (NSF) under Grant No. NSFCMS-0324522 and the Precast/Prestressed Concrete Institute (PCI). The writers are grateful for this support. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the writers(s) and do not necessarily reflect the views of the National Science Foundation.
References
Alsiwat, J. M., and Saatciogu, M. (1992). “Reinforcement anchorage slip under monotonic loading.” J. Struct. Eng., 118(9), 2421–2438.
American Concrete Institute (ACI) Committee 318. (2005). “Building code requirements for structural concrete and commentary.” ACI 318-05, Detroit.
American Concrete Institute (ACI) Committee 318. (2008). “Building code requirements for structural concrete and commentary.” ACI 318-08, Detroit.
ASCE/SEI (2006). Minimum design loads for buildings and other structures, ASCE/SEI 7-05, Supplement 1, ASCE, Reston, Va.
Cao, L., and Naito, C. (2006). “Design of precast diaphragm chord connections for in-plane tension demands.” J. Struct. Eng., accepted.
Farrow, K. T., and Fleischman, R. B. (2003). “Effect of dimension and detail on the capacity of precast concrete parking structure diaphragms.” PCI J., 48(5), 46–61.
Federal Emergency Management Agency (FEMA). (2000). “Prestandard and commentary for the seismic rehabilitation of buildings.” FEMA 356, prepared by the American Society of Civil Engineers for the Federal Emergency Management Agency, Washington, D.C.
Fleischman, R. B., Farrow, K. T., and Eastman, K. (2002). “Seismic performance of perimeter lateral-system structures with highly flexural diaphragms.” Earthquake Spectra, 18(2), 251–286.
Fleischman, R. B., Naito, C. J., Restrepo, J., Sause, R., and Ghosh, S. K. (2005a). “Seismic design methodology for precast concrete diaphragms. Part 1: Design framework.” PCI J., 50(5), 68–83.
Fleischman, R. B., Naito, C. J., Restrepo, J., Sause, R., Ghosh, S. K., Wan, G., Schoettler, M., and Cao, L. (2005b). “Seismic design methodology for precast concrete diaphragms. Part 2: Research program.” PCI J., 50(6), 2–19.
Fleischman, R. B., Sause, R., Pessiki, S., and Rhodes, A. B. (1998). “Seismic behavior of precast parking structure diaphragms.” PCI J., 43(1), 38–53.
International Code Council (ICC). (2003). International building code, Falls Church, Va.
International Conference of Building Officials (ICBO). (1997). Uniform building code, Whittier, Calif.
Naito, C., Peter, W., and Cao, L. (2006). “Development of a seismic design methodology for precast diaphragms—Phase 1 summary report.” ATLSS Rep. No. 06-01, ATLSS Center, Lehigh Univ., Bethlehem, Pa.
Pincheira, J. A., Oliva, M. G., and Kusumo-Rahardjo, F. I. (1998). “Tests on double tee flange connectors subjected to monotonic and cyclic loading.” PCI J., 43(3), 82–96.
Prestressed Concrete Institute (PCI) (1999). PCI design handbook—Precast and prestressed concrete, 5th Ed., Chicago, Ill.
Rodriguez, M., Restrepo, J. I., and Carr, A. J. (2002). “Earthquake induced floor horizontal accelerations in buildings.” Earthquake Eng. Struct. Dyn., 31(3), 693–718.
Wood, S. L., Stanton, J. F., and Hawkins, N. M. (2000). “New seismic design provisions for diaphragms in precast concrete parking structures.” PCI J., 45(1), 50–65.
Zheng, W., and Oliva, M. G. (2005). “A practical method to estimate elastic deformation of precast pretopped double-tee diaphragms.” PCI J., 50(2), 44–55.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 133 • Issue 11 • November 2007
Pages: 1616 - 1626
Copyright
© 2007 ASCE.
History
Received: Jan 9, 2006
Accepted: Jul 14, 2006
Published online: Nov 1, 2007
Published in print: Nov 2007
Notes
Note. Associate Editor: Yahya C. Kurama
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.