Near-Fault Ground Motion Effects on Simple Structures
Publication: Journal of Structural Engineering
Volume 127, Issue 9
Abstract
Ground motion records obtained from sites at known locations relative to earthquake faults were used to study near-fault (NF) ground shaking effects on the inelastic response of simple structures. The structures were idealized as single-degree-of-freedom oscillators with periods ranging from 0.05 to 3.0 s, a damping ratio of 2%, and target ductilities of 2, 4, and 6. The severity of inelastic response was described by a relationship between the oscillator period, the target ductility, and the lateral force reduction factor obtained from analysis. It was found that the inelastic demands of medium and longer period oscillators responding to NF strike-normal shaking increased for sites close to the fault as the distance along the fault from the epicenter increased. The inelastic response of short-period oscillators was not affected as much by NF shaking. A methodology for obtaining average and design level demands for structures at specific locations relative to the epicenter and fault is described. A design example is provided.
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References
1.
Alavi, B., and Krawinkler, H. ( 1999). “Effect of near-fault ground motions on the response to frame structures.” Proc., ASCE Struct. Congr., ASCE, Reston, Va., 79–82.
2.
Applied Technology Council (ATC). ( 1996). “Seismic evaluation and retrofit of concrete buildings.” ATC-40, Redwood City, Calif.
3.
Applied Technology Council (ATC). ( 1997). “Evaluation and repair of earthquake damaged concrete and masonry wall buildings.” Workshop Draft, Redwood City, Calif.
4.
Berrill, J., Priestley, M. J. N., and Chapman, H. ( 1980). “Design earthquake loading and ductility demand.” Bull. New Zealand Nat. Soc. for Earthquake Engrg., Upper Hutt, New Zealand, 13(3), 232–241.
5.
Bertero, V. V., Anderson, J. C., and Sasani, M. ( 1999). “Impulse EQGMs: A historical and critical review.” Proc., ASCE Struct. Congr., ASCE, Reston, Va., 91–94.
6.
Bertero, V. V., Mahin, S. A., and Herrara, R. A. ( 1978). “Aseismic design implications of near-fault San Fernando earthquake records.” Earthquake Engrg. and Struct. Dyn., 6(1), 31–42.
7.
Bozorgnia, Y., and Mahin, S. ( 1998). “Ductility and strength demands of near-fault ground motions from the Northridge earthquake.” Proc., 6th U.S. Nat. Conf. on Earthquake Engrg., Earthquake Engineering Research Institute, Oakland, Calif.
8.
Dunn, M. ( 1995). “Analysis of bilinear single degree of freedom oscillators subjected to seismic accelerations on soft soil sites: Applications to seismic isolation.” Master's thesis, University of Washington, Seattle.
9.
Federal Emergency Management Agency (FEMA). ( 1997). “NEHRP guidelines for the seismic rehabilitation of buildings.” 1996 Ed., FEMA273, Washington, D.C.
10.
Federal Emergency Management Agency (FEMA). ( 1998). “NEHRP recommended provisions for seismic regulations for new buildings and other structures.” 1997 Ed., FEMA302, Washington, D.C.
11.
Gasparini, D., and Vanmarcke, E. H. ( 1976). “Simulated earthquake motions compatible with prescribed response spectra.” Res. Rep. 76-4, Order No. 527, Dept. of Civ. Engrg., Massachusetts Institute of Technology, Cambridge, Mass.
12.
Gulkan, P., and Sozen, M. A. ( 1974). “Inelastic response of reinforced concrete structures to earthquake motions.” ACI J., 71(12), 104–126.
13.
Hall, J. F., et al. ( 1995). “Near-source ground motion and its effect on flexible buildings.” Earthquake Spectra, 11(4), 569–605.
14.
International Conference of Building Officials, (ICBO). ( 1997). Uniform building code, Whittier, Calif.
15.
Iwan, W. D. ( 1998). “Shear drift demand spectrum: Implications for earthquake-resistant design.” Proc., 6th U.S. Nat. Conf. on Earthquake Engrg., Earthquake Engineering Research Institute, Oakland, Calif.
16.
Japan Road Association (JRA). ( 1996). Design specifications for highway bridges, Part V, Seismic design, Tokyo.
17.
Krawinkler, H., and Nassar, A. A. ( 1992). “Seismic design based on ductility and cumulative damage demands and capacities.” Nonlinear seismic analysis and design of reinforced concrete buildings, P. Fajfar and H. Krawinkler, eds., Elsevier Science, New York, 23–40.
18.
MacRae, G. A., and Roeder, C. W. ( 1999). “Near-field ground motion effects on short structures.”Final Rep. to PG&E/PEER, Pacific Earthquake Engineering Research Center, Richmond, Calif.
19.
Miranda, E., and Bertero, V. ( 1994). “Evaluation of strength reduction factors for earthquake-resistant design.” Earthquake Spectra, 10(2), 357–397.
20.
Morrow, D. V. ( 1998). “Near-fault ground motion effects on inelastic SDOF response.” Master's thesis, University of Washington, Seattle.
21.
National Geophysical Data Center (NGDC). ( 1996). Earthquake strong motion, Bolder, Colo. (3 CD collection).
22.
Paulay, T., and Priestley, M. J. N. ( 1992). Seismic design of reinforced concrete and masonry buildings, Wiley, New York.
23.
Priestley, M. J. N., Seible, F., and Chai, Y. H. ( 1992). “Design guidelines for assessment, retrofit and repair of bridges for seismic performance.” San Diego Struct. Sys. Rep. No. SSRP-92/01, University of California, San Diego.
24.
Roeder, C. W., and MacRae, G. A. ( 1999). “Seismic behavior of concrete-filled steel frame substations.” Final Rep. to PG&E-PEER.
25.
Sakai, J., and Kawashima, K. ( 1997). “Evaluation of Hyogo-ken Nanbu Earthquake ground motions in terms of pulse ground motion.” Proc., 24th Earthquake Engrg. Res. Conf.
26.
Somerville, P., Smith, N., Graves, R., and Abrahamson, N. ( 1997a). “Modification of empirical strong ground motion attenuation relations to include the amplitude and duration effects of rupture directivity.” Seismological Res. Letters, 68(1), 199–222.
27.
Somerville, P., Smith, N., Punyamurthula, S., and Sun, J. ( 1997b). “Development of ground motion time histories for phase 2 of the FEMA/SAC steel project.” Rep. No. SAC/BD-97/04, SAC Steel Project, Richmond, Calif.
28.
Tagawa, H. ( 1999). “Response of 3-D frames with bi-directional columns.” MSCE thesis, University of Washington, Seattle.
29.
Veletsos, A., and Newmark, N. ( 1960). “Effect of inelastic behavior on the response of simple systems to earthquake motions.” Proc., 2nd World Conf. on Earthquake Engrg., Science Council of Japan, Tokyo, 895–912.
30.
Vidic, T., Fajfar, P., and Fischinger, M. ( 1994). “Consistent inelastic design spectra: Strength and displacement.” Earthquake Engrg. and Struct. Dyn., 23(5), 507–521.
Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 127 • Issue 9 • September 2001
Pages: 996 - 1004
History
Received: Dec 15, 1999
Published online: Sep 1, 2001
Published in print: Sep 2001
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