Criterion for Preventing Formation of Story Mechanism in Vertically Irregular Wall Buildings
Source abstract
Abstract
Wall buildings with vertically irregular configurations have been severely damaged or even collapsed due to the formation of a story mechanism during severe earthquakes, particularly under near-fault earthquake excitation. This paper presents a criterion to prevent such failures. A story-safety factor is defined to represent the relative reserve strength against a story mechanism in the structure. The validity of this factor was examined by conducting dynamic response analyses of various analytical models of 7- and 11-story wall structures with discontinuous wall panels in the first story using 29 real earthquake records (mostly near-fault records) and their scaled motions with various intensity levels. The results show that the proposed story-safety factor controlled well the failure mechanism of the structures. When the story-safety factor was larger than the corresponding dynamic shear magnification factor (Paulay and Priestley 1992) minus unity, a story mechanism did not occur in the structures in all cases. A practical procedure for using the story-safety factor to prevent the formation of a story mechanism in irregular stories is also presented.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Seismic Performance and Analysis · Masonry and Concrete Structural Analysis · Structural Engineering and Vibration Analysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Earthquake Research Institute, University of Tokyo
Dept. of Architecture and Civil Engineering, Nagoya Institute of Technology
References (24)
Show source-provided references
1. Al-Ali, and Krawinkler, H. (1998). “Effects of vertical strength irregularities on seismic behavior of frame structures.” Proc. of The Eleventh European Conference on Earthquake Engrg., A. A. Balkema, Rotterdam.
2. Alavi B. and Krawinkler, H. (2004). “Behavior of moment-resisting frame structures subjected to near-fault ground motions.” Earthquake Engineering and Structural Dynamics, 33(6), 707-722.10.1002/eqe.370 ↗
3. Bracci, J. M., Kunnath, S. K. and Reinhorn, A. M. (1997). “Seismic performance and retrofit evaluation of reinforced concrete structures.” J. Struct. Engrg., ASCE, 123(1), 3-10.10.1061/(ASCE)0733-9445(1997)123:1(3) ↗
4. Chopra, A.K. (2001). “Dynamics of Structures: Theory and Applications to Earthquake Engineering.” (2nd edition). Prentice-Hall: Englewood Cliffs, NJ, 844 pp.
5. Das, S. and Nau, J.M. (2003). “Seismic design aspects of vertically irregular reinforced concrete buildings.” Earthquake Spectra, 19(3), 455-477.10.1193/1.1595650 ↗
6. Dinh, T. V. and Ichinose, T. (2002). “Probabilistic estimation of seismic story drifts in RC buildings.” Proc. of The Forth U.S-Japan Workshop on Performance-Based Earthquake Engineering Methodology for Reinforced Concrete Building Structures, Toba, Japan, 77-91.
7. Dinh, T. V. and Ichinose, T. “Probabilistic estimation of seismic story drifts in reinforced concrete buildings.” J. Struct. Engrg., ASCE, in press.
8. Dinh, T.V., Ichinose, T. and Marubashi, N. (2004). “Collapse control of irregular wall buildings using story-safety factor.” Proc. of The 13th World Conference on Earthquake Engineering, Vancouver, B.C., Canada, paper ID 1340.
9. Dooley, L. and Bracci, J.M. (2001). “Seismic evaluation of column-to-beam strength ratios in reinforced concrete frames.” ACI Struct. J., 98(6), 834-851.
10. Eurocode 8. (1994). Design Provisions for earthquake resistance of structures. CEN/TC250/SC8, European Commission for Standardization, Brussels, Belgium.
11. FEMA. (1997). “NEHRP recommended provisions for seismic regulations for new buildings and other structures.” Part 1: Provisions (FEMA 302) and Part 2: Commentary (FEMA 303), Federal Emergency Management Agency, Washington, DC.
12. Hidalgo, P.A., Arias, A. and Cruz, E.F. (1994). “Influence of vertical structural irregularity on the selection of the method of seismic analysis.” Proc. of Fifth U.S. National Conference on Earthquake Engineering, Earthquake Engineering Research Inst., Oakland, California, Vol. I, pp. 293-302.
13. IBC (2000). “International Building Code.” International Code Council, Falls Church: Virginia.
14. Lu, Y. (2002). “Comparative study of seismic behavior of multistory reinforced concrete framed structures.” J. Struct. Engrg., ASCE, 128(2), 169-178.10.1061/(ASCE)0733-9445(2002)128:2(169) ↗
15. Ministry of Land, Infrastructure and Transport (MLIT). (2001). “Standard for seismic capacity evaluation of existing reinforced concrete buildings.” Japan Association for Building Disaster Prevention, Tokyo, 300 pp.
16. Miranda, E. (2002). “Approximate lateral drift demands in multistory buildings with nonuniform stiffness.” J. Struct. Engrg., ASCE, 128(7), 840-849.10.1061/(ASCE)0733-9445(2002)128:7(840) ↗
17. Moehle, J. P. and Alarcon, L.F. (1986). “Seismic analysis methods for irregular buildings.” Journal of Structural Engineering, ASCE, 112(1), 35-52.10.1061/(ASCE)0733-9445(1986)112:1(35) ↗
18. Park, R. and Paulay, T. (1975). “Reinforced concrete structures.” John Wiley & Sons, New York, 769 pp.
19. Paulay, T. and Priestley, M.J.N. (1992). “Seismic design of reinforced concrete and masonry buildings.” John Wiley & Sons: A Wiley Interscience Publications, New York, 744 pp.10.1002/9780470172841 ↗
20. PEER. “Strong Motion Database.” Website of the Pacific Earthquake Engineering Research Center, http://peer.berkeley.edu/smcat/search.html, September 2, 2001.
21. Priestley, M. J. N. (2003). “Does capacity design do the job ? An examination of higher mode effects in cantilever walls.” Bulletin of The New Zealand National Society for Earthquake Engineering, Waikanae, New Zealand, 36(4), 276-292.10.5459/bnzsee.36.4.276-292 ↗
22. Priestley, M. J. N. and Kowalsky, M. J. (1998). “Aspects of drift and ductility capacity of rectangular cantilever structural walls.” Bulletin of The New Zealand National Society for Earthquake Engineering, Waikanae, New Zealand, 31(2), 73-85.10.5459/bnzsee.31.2.73-85 ↗
23. Shibata, A. and Sozen, M. A. (1976). “Substitute-structure method for seismic design in R/C.” J. Struct. Div., ASCE, 102(ST1), 1-18.
24. Takeda, T., Sozen, M. A. and Nielson, N. N. (1970). “Reinforced concrete response to simulated earthquakes.” J. Struct. Engrg., ASCE, 96(4), 2557-2573.