Seismic Vulnerability of Flat Slab‐Core Buildings
Publication: Journal of Structural Engineering
Volume 120, Issue 2
Abstract
This paper presents the seismic vulnerability evaluation of a 27‐story reinforced concrete flat slab‐core building, which had not been designed for seismic forces. The evaluation is based on the FEMA‐178 handbook in conjunction with structural identification by modal testing and sensitivity analyses. Experimentally determined dynamic characteristics and lateral flexibility are used to develop and calibrate a three‐dimensional (3D) analytical model. Response spectrum sensitivity studies are conducted. The parameters that influence the degradation of the lateral stiffness under seismic loading are considered for predicting possible demand envelopes under expected and maximum credible earthquakes. Evaluation of demands versus capacities at the element level indicates that the building is adequate for FEMA‐178 specified forces but vulnerable to the maximum credible earthquake. Exterior slab‐column connections are found to be the weakest links in the building. Investigation of the failure behavior of the building during its implosion is also presented. Problems in the application of FEMA‐178 to buildings typical of the midwestern and eastern United States are noted, and suggestions for improvement are presented.
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References
1.
“A handbook for seismic evaluation of existing buildings (preliminary).” (1989). FEMA‐178, Applied Technology Council Rep. ATC‐22, Federal Emergency Management Agency (FEMA), Washington, D.C.
2.
Aktan, A. E., and Nelson, G. E. (1988). “Problems in predicting seismic responses of RC buildings.” J. Struct. Engrg., ASCE, 114(9), 2036–2056.
3.
Bertero, V. V. (1988). “Earthquake hazard reduction, technical capabilities: U.S. perspectives.” Proc., 2nd U.S.‐Japan Workshop on Urban Hazards Reduction, Earthquake Engineering Research Institute, Shimizu, Japan.
4.
Bertero, V. V., et al. (1991). “Design guidelines for ductility and drift limits.” Rep. No. UCB/EERC‐91‐15, Earthquake Engineering Research Center, Berkeley, Calif.
5.
“Building code requirements for reinforced concrete.” (1989). ACI 318‐89, American Concrete Inst. (ACI), Detroit, Mich.
6.
“Evaluating the seismic resistance of existing buildings.” (1987). Rep. ATC‐14, Applied Technology Council, Redwood City, Calif.
7.
Fairweather, V. (1992). “L'Ambiance Plaza: what have we learned.” Civ. Engrg., ASCE, 62(2), 38–41.
8.
“Foundation investigation‐proposed Sanders residence complex.” (1968). Rep., The H.C. Nutting Co., Cincinnati, Ohio.
9.
Habibullah, A. (1989). ETABS users manual. Computer and Structures, Berkeley, Calif.
10.
Kreger, M. E., and Sozen, M. A. (1989). “Seismic response of Imperial county services building in 1979.” J. Struct. Engrg., ASCE, 115(12), 3095–3111.
11.
Moehle, J. P., and Diebold, J. W. (1985). “Lateral load response of a flat‐plate frame.” J. Struct. Engrg., ASCE, 111(10), 2149–2164.
12.
Moehle, J. P., Kreger, M. E., and Leon, R. (1988). “Backgrounds to recommendations for design of reinforced concrete slab‐column connections.” ACI Struct. J., 85(6), 636–644.
13.
Murphy, L. M. (1973). San Fernando, California earthquake of February 9, 1971. U.S. Department of Commerce, Washington, D.C., Vol. 1, Parts A and B.
14.
NEHRP recommended provisions for the development of seismic regulations for new buildings. (1988). Building Seismic Safety Council, Washington, D.C.
15.
NEHRP recommended provisions for the development of seismic regulations for new buildings. (1991). Building Seismic Safety Council, Washington, D.C.
16.
Ohio building code. (1964). Banks Baldwin Law Publishing Co., Cleveland, Ohio.
17.
Otani, S. (1989). “Seismic vulnerability evaluation in Japan.” Seismic Engineering: Research and Practice, C. A. Kircher and A. K. Chopra, eds., ASCE, New York, N.Y., 527–536.
18.
Rahman, S., Turkstra, C., Grigoriu, M., and Kim, H. J. (1989). “Seismic performance of existing building in New York City.” Seismic Engineering: Research and Practice, C. A. Kircher and A. K. Chopra, eds., ASCE, New York, N.Y., 488–496.
19.
“Recommendations for design of slab‐column connections in monolithic reinforced concrete structures.” (1988). ACI Struct. J., 85(6), 675–696.
20.
Robertson, I. N., and Durrani, A. J. (1991). “Gravity load effect on seismic behavior of exterior slab‐column connections.” ACI Struct. J., 88(3), 255–267.
21.
“Sander hall concrete coring.” (1989). Rep., The H.C. Nutting Co., Cincinnati, Ohio.
22.
“Seismic hazard methodology for the central and eastern United States.” (1986). Rep. No. EPRI NP‐4726, Vols. 6–10, Electric Power Research Institute (EPRI), Palo Alto, Calif.
23.
“Societal implications: selected readings.” (1985). FEMA‐84, Building Seismic Safety Council, Washington, D.C.
24.
Somaprasad, H. R., Toksoy, T., Yoshiyuki, H., and Aktan, A. E. (1991). “Closed‐loop modal testing of a 27‐story reinforced concrete flat‐plate building with cores.” Rep. No. NCEER‐91‐0016, National Center for Earthquake Engineering Research, Buffalo, N.Y.
25.
“Stairway improvements—Sander Hall.” (1982). Rep., The H.C. Nutting Co., Cincinnati, Ohio.
26.
Vanderbilt, M. D., and Corley, W. G. (1983). “Frame analysis of concrete buildings.” Concrete Int., 5(12), 33–43.
27.
Weidlinger, P., and Ettouney, M. M. (1988). “Seismic behavior of flat slab high‐rise buildings in the New York city area.” Rep. No. NCEER‐88‐0039, National Center for Earthquake Engineering Research, Buffalo, N.Y.
28.
Wilson, E. L., Kiureghian, A. D., and Bayo, E. P. (1981). “A replacement for the SRSS method in seismic analysis.” Earthquake Engineering and Struct. Dynamics, 9, 187–192.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 120 • Issue 2 • February 1994
Pages: 339 - 359
Copyright
Copyright © 1994 American Society of Civil Engineers.
History
Received: Jun 17, 1992
Published online: Feb 1, 1994
Published in print: Feb 1994
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