NEHRP Clearinghouse
- Title
- Seismic Response of Multiply Supported Secondary Systems with Dynamic Interaction Effects.
- File
- PB87129748.pdf
- Author(s)
- Burdisso, R. A.; Singh, M. P.
- Source
- National Science Foundation, Washington, DC., April 1986, 95 p.
- Identifying Number(s)
- VPI-E-86-13
- Abstract
- For a proper response analysis of a secondary system with multiple supports, the seismic inputs are required to be defined in terms of the auto and cross floor response spectra. If no feed-back or interaction effect from the secondary system to its supporting primary structure is suspected, these inputs can be developed by a direct analysis of the supporting structure alone. However, sometimes the effect of the interaction on the secondary system response can be quite significant. Herein, a method is developed to incorporate the feed-back effect, through proper modifications of the interaction-free floor spectrum inputs. The interaction coefficients are used to effect such modifications in different floor spectral quantities. A procedure for the calculation of the interaction coefficients is proposed. The modified floor spectra when used as inputs to the secondary system do introduce the interaction effect in the secondary system response.
- Keywords
- Structural engineering; Floors; Secondary systems; Supports; Feedback control; Vibration; Pipes (Tubes); Seismic surveys; Responses; Electrical power plants; Earthquakes engineering; Earthquakes; Dynamic structural analysis