NEHRP Clearinghouse
- Title
- Seismic Response of Structural System with Random Parameters.
- File
- PB82123977.pdf
- Author(s)
- Ghafory-Ashtiany, M.
- Source
- National Science Foundation, Washington, DC., September 1981, 107 p.
- Identifying Number(s)
- VPI-E-81-15
- Abstract
- Seismic response of a structural system depends upon its mass, stiffness and damping characteristics. Also, most building systems have eccentricity between their mass and stiffness centers which affect their dynamic response. These quantities can rarely be estimated precisely, and therefore they should be considered as random variables and the calculated dynamic response should reflect the uncertainties associated with these parameters. In this investigation the sensitivity of seismic response with respect to changes in these parameters has been studied. Rates of change of various response quantity with respect to the variables of mass, stiffness and eccentricity have been obtained and then used in the evaluation of structural response uncertainty by a first order perturbation approach. A multistory rigid floor system has been examined; its displacement, base shear, base torsional moment and column moment response characteristics have been studied.
- Keywords
- Numerical analysis; Earthquake resistant structures; Dynamic response; Buildings; Earthquake engineering; Random vibration; Bending moments; Seismic response; Earthquakes; Dynamic structural analysis