Seismic Interaction in Cable-Connected Equipment Items
Publication: Journal of Engineering Mechanics
Volume 127, Issue 11
Abstract
An electrical substation consists of a complex set of equipment items that are interconnected through conductor buses or cables. If the connections are not sufficiently flexible, significant dynamic interaction may occur between the connected equipment items during seismic excitations. This paper investigates the effect of interaction between two equipment items connected by a cable conductor. Analytical as well as large-deformation finite-element analyses are used to determine the nonlinear response of the cable-connected system to selected ground motions. Influences of the cable geometry and its axial extensibility, flexural stiffness, and inertia on the interaction effect are evaluated. It is found that the interaction may significantly amplify the responses of the equipment items relative to their stand-alone responses when the cable lacks sufficient slack. The amplification can be particularly large for the higher frequency equipment item. A parameter for predicting the interaction effect is introduced and evaluated for a large set of example systems.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Benuska, L., ed. ( 1990). “Chapter 8: Lifelines.” Earthquake Spectra, 6(Suppl.), 315–338.
2.
Cardou, A., and Jolicoeur, C. ( 1997). “Mechanical models of helical strands.” Appl. Mech. Rev., 50(1), 1–14.
3.
Cosserat, E., and Cosserat, F. ( 1967). Theory of deformable bodies, National Aeronautics and Space Administration, Washington, D.C.
4.
Dastous, J.-B., and Pierre, J.-R. ( 1996). “Experimental investigation on the dynamic behavior of flexible conductors between substation equipment during an earthquake.” IEEE Trans. on Power Delivery, 11(2), 801–807.
5.
Der Kiureghian, A., Sackman, J. L., and Hong, K.-J. ( 1999a). “Interaction in interconnected electrical substation equipment subjected to earthquake ground motions.” Rep. No. PEER 1999/01, Pacific Earthquake Engrg. Res. Ctr., University of California, Berkeley, Calif.
6.
Der Kiureghian, A., Sackman, J. L., and Hong, K.-J. ( 1999b). “Further studies on seismic interaction in interconnected electrical substation equipment.” Rep. PEER 2000/01, Pacific Earthquake Engrg. Res. Ctr., University of California, Berkeley, Calif.
7.
Der Kiureghian, A., Sackman, J. L., and Hong, K.-J. ( 2001). “Seismic interaction in linearly connected electrical substation equipment.” Earthquake Engrg. and Struct. Dyn., 30(3), 327–347.
8.
Ernst, H.-J. ( 1965). “Der E-modul von seilen unter berucksichtigung des durchhanges.” Der Bauingenieur, Berlin, 40(2), 52–55 (in German).
9.
Goudreau, S., Charette, F., Hardy, C., and Cloutier, L. (1998). “Bending energy dissipation of simplified single-layer stranded cable.”J. Engrg. Mech., ASCE, 124(8), 811–817.
10.
Hall, J., ed. ( 1995). “Chapter 4: Lifelines.” Earthquake Spectra, 11(Suppl. C), 188–217.
11.
Ibrahimbegovic, A., and Mikdad, M. A. ( 1998). “Finite rotations in dynamics of beams and implicit time-steeping schemes.” Int. J. Numer. Methods in Engrg., 41(5), 781–814.
12.
Institute of Electrical and Electronics Engineers (IEEE). ( 1999). “Draft recommended practice for the design of flexible buswork located in seismically active area.” IEEE P1527/D5, New York.
13.
Irvine, H. M. ( 1981). Cable structures, MIT Press, Cambridge, Mass.
14.
Kuhl, D., and Crisfield, M. A. ( 1999). “Energy-conserving and decaying algorithms in nonlinear structural dynamics.” Int. J. Numer. Methods in Engrg., 45(5), 569–599.
15.
Meriam, J. L., and Kraige, L. G. ( 1997). Engineering mechanics. Volume I: Statics, 4th Ed., Wiley, New York.
16.
Simo, J. C., Tarnow, N., and Wong, K. K. ( 1992). “Exact energy-momentum conserving algorithms and symplectic schemes for nonlinear dynamics.” Comp. Methods in Appl. Mech. and Engrg., 100(1), 63–116.
17.
Simo, J. C., Tarnow, N., and Doblare, M. ( 1995). “Nonlinear dynamics of three-dimensional rods: Exact energy and momentum conserving algorithms.” Int. J. Numer. Methods in Engrg., 38(9), 1431–1473.
18.
Taylor, R. L. ( 1998). FEAP version 7.1 user manual, Dept. of Civ. and Envir. Engrg., University of California, Berkeley, Calif.
Information & Authors
Information
Published In
History
Received: May 24, 2000
Published online: Nov 1, 2001
Published in print: Nov 2001
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.