Behavior and Design of Posttensioned Steel Frame Systems
Publication: Journal of Structural Engineering
Volume 133, Issue 3
Abstract
A posttensioned (PT) steel moment resisting frame is a self-centering earthquake resistant steel frame that uses posttensioning steel to compress the beam flanges against the column flanges at the connections. The posttensioning contributes to the moment capacity of the connections and provides an elastic restoring force that returns the frame to its pre-earthquake position. This paper describes the behavior and design of PT frames and PT frame systems, where a PT frame system is a PT frame with the collector elements that connect it to the floor system. The interaction of the floor system with the PT frame produces axial forces in the beams that add to those from the posttensioning. This paper outlines a performance-based seismic design approach for PT steel frame systems. Seismic performance levels, seismic input levels, structural limit states and capacities, and structural demands for PT frame systems are defined. The design objectives are outlined, design criteria are given, and a step-by-step design procedure is given. The design approach is evaluated via comparisons with time-history analysis results.
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Acknowledgments
This research was conducted at the ATLSS Center at Lehigh University, and was supported by the National Science Foundation (Grant No. NSFCMS-9396120), a Lehigh University Fellowship, and a grant from the Pennsylvania Department of Community and Economic Development through the Pennsylvania Infrastructure Technology Alliance (PITA). The opinions expressed in this paper are those of the writers and do not necessarily reflect the views of the sponsors.
References
AISC. (2002). Seismic provisions for structural steel buildings, Chicago.
AISC. (2005). Seismic provisions for structural steel buildings, Chicago.
Building Seismic Safety Council. (1997). “NEHRP recommended provisions for seismic regulations for new buildings and other structures. Part 1—Provisions.” Rep. No. FEMA-302, for the Federal Emergency Management Agency, Washington, D.C.
Christopoulos, C., Filiatrault, A., Uang, C.-M., and Folz, B. (2002a). “Posttensioned energy dissipating connections for moment-resisting steel frames.” J. Struct. Eng., 128(9), 1111–1120.
Christopoulos, C., Filiatrault, A., and Uang, C.-M. (2002b). “Behavior of steel moment resisting frames with post-tensioned energy dissipating connections.” Proc., 7th U.S. National Conf. on Earthquake Engineering, Boston.
El-Sheikh, M. T., Sause, R., Pessiki, S., and Lu, L.-W. (1999). “Seismic behavior and design of unbonded post-tensioned precast concrete frames.” PCI J., 44(3), 54–71.
Garlock, M. (2002). “Full-scale testing, seismic analysis, and design of post-tensioned seismic resistant connections for steel frames.” Ph.D. dissertation, Civil and Environmental Engineering Dept., Lehigh Univ., Bethlehem, Pa.
Garlock, M., Li, J., and Blaisdell, M. L. (2006). “Floor diaphragm interaction with self-centering steel moment frames.” Proc., 8th U.S. National Conf. on Earthquake Engineering (NCEE), San Francisco.
Garlock, M., Ricles, J., and Sause, R. (2003). “Cyclic load tests and analysis of bolted top-and-seat angle connections.” J. Struct. Eng., 129(12), 1615–1625.
Garlock, M., Ricles, J., and Sause, R. (2005). “Experimental studies on full-scale post-tensioned steel connections.” J. Struct. Eng., 131(3), 438–448.
International Code Council. (2000). International building code, Falls Church, Va.
Kasai, K., and Xu, Y. (2003). “Cyclic behavior and low-cycle fatigue of semi-rigid connections (Part I: Bolted angle connections).” Proc., Steel Structures in Seismic Areas (STESSA), Naples, Italy.
Prakash, V., Powell, G., and Campbell, S. (1993). “DRAIN-2DX base program description and user guide; version 1.10.” Rep. No. UCB/SEMM-93/17&18, Structural Engineering Mechanics and Materials, Dept. of Civil Engineering, Univ. of California, Berkeley, Calif.
Ricles, J., Sause, R., Garlock, M., and Zhao, C. (2001). “Posttensioned seismic-resistant connections for steel frames.” J. Struct. Eng., 127(2), 113–121.
Ricles, J., Sause, R., Peng, S. W., and Lu, L. W. (2002). “Experimental evaluation of earthquake resistant posttensioned steel connections.” J. Struct. Eng., 128(7), 850–859.
Rojas, P., Ricles, J., and Sause, R. (2005). “Seismic performance of post-tensioned steel moment resisting frames with friction devices.” J. Struct. Eng., 131(4), 529–540.
SAC Joint Venture. (2000). “Recommended design criteria for new steel moment frame structures.” Rep. No. FEMA-350, for the Federal Emergency Management Agency, Washington, D.C.
Shen, Q., and Kurama, Y. C. (2002). “Nonlinear behavior of hybrid coupled wall subassemblages.” J. Struct. Eng., 128(10), 1290–1300.
Somerville, P., Smith, N., Punyamurthula, S., Sun, J., and Woodward-Clyde (1997). “Federal services.” Development of ground motion time histories for Phase 2 of the FEMA/SAC Steel Project, SAC/BD-97/04 SAC Joint Venture, Sacramento, Calif.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 133 • Issue 3 • March 2007
Pages: 389 - 399
Copyright
© 2007 ASCE.
History
Received: Jul 18, 2005
Accepted: Aug 11, 2006
Published online: Mar 1, 2007
Published in print: Mar 2007
Notes
Note. Associate Editor: James S Davidson
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