NEHRP Clearinghouse
- Title
- Dynamic Instability and Ultimate Capacity of Inelastic Systems Parametrically Excited by Earthquakes. Part II.
- File
- PB261097.pdf
- Author(s)
- Cheng, F. Y.; Oster, K. B.
- Source
- National Science Foundation, Washington, D.C. Div. of Advanced Environmental Research and Technology., August 1976, 339 p.
- Identifying Number(s)
- CIVIL ENGINEERING STUDY-76-1
- Abstract
- An analytical study is presented for the behavior of multi-story framed structures subjected to the interaction of horizontal and vertical components of an earthquake. Frameworks having three to ten stories and one to three bays are studied on the basis of two lumped mass models with elastic, elasto-plastic and bilinear material behavior. The studies include the characteristics of input energy, kinetic energy, elastic strain energy, dissipated strain, and damping energy; the reduction of plastic moment capacity of columns; ductility and excursion rations; and the P-delta effect. Numerical results show that the inclusion of the vertical ground motion can significantly influence the response parameters of lateral displacements and ductility requirements and consequently causes structural collapse.
- Keywords
- Plastic analysis; Framed structures; Elastic analysis; Dynamic response; Earthquake engineering; Buckling; Computer programs; Foundations; Dynamic instability; Loads (Forces); Earthquakes; Dynamic structural analysis