NEHRP Clearinghouse
- Title
- Seismic Response for Multicomponent Earthquakes.
- File
- PB84193747.pdf
- Author(s)
- Ghafory-Ashtiany, M.; Singh, M. P.
- Source
- National Science Foundation, Washington, DC., April 1984, 205 p.
- Identifying Number(s)
- VPI-E-84-17
- Abstract
- The earthquake induced ground motions, in general, have six components: three translational and three rotational. These components are also correlated in general. In this study, the response spectrum methods have been developed to obtain the structural design response for such correlated components. The forces induced in a structure depend upon the orientation of the structure with respect to the impinging seismic waves. An approach has also been developed to obtain the maximum or the worst-case response which could possibly be induced in the structure when it is oriented in a particular direction. The numerical results demonstrating the application of these approaches are presented for the proportionally as well as the nonproportionally damped structures. The results indicate that a systematic approach, as given in the report, should be used to obtain the worst-case response to avoid an unconservative structural design. Also, the rotational components of a ground input should not be customarily disregarded as inconsequential, especially if the structure is large or tall.
- Keywords
- Translational motion; Rotational motion; Dynamic loads; Correlation techniques; Damping; Ground motion; Earthquake engineering; Theses; Dynamic structural analysis