NEHRP Clearinghouse
- Title
- Investigation of the Effect of 3-D Parametric Earthquake Motions on Stability of Elastic and Inelastic Building Systems. Report No. 1.
- File
- PB80176936.pdf
- Author(s)
- Cheng, F. Y.; Kitipitayangkul, P.
- Source
- National Science Foundation, Washington, DC. Engineering and Applied Science., August 1979, 396 p.
- Identifying Number(s)
- CIVIL ENGINEERING STUDY-79-10
- Abstract
- The effect of interacting, three-dimensional ground motions on the response behavior of elastic and inelastic building systems is investigated. The building systems may have elevator cores, floor diaphragms, and shear walls of reinforced concrete as well as steel beams, columns, and bracings. The stiffness matrices are derived from the Ramberg-Osgood hysteresis model for steel and Takeda's model for concrete. The geometric matrix is formulated for the second-order effect on large deflections. The interacting forces on the yielding surfaces of the members are included. A computer program, INRESB-3D, has been comprehensively developed for achieving efficiency in both computation and data preparation. A total of 26 numerical examples have been studied for various low-rise and high-rise building systems, which show that an interacting ground motion can significantly increase internal forces, nodal displacements, ductilities, and seismic input and dissipated energy. The large ductilities and the excessive permanent deformations induced by a coupling motion exhibit severe local damage and thus diminish the serviceability of a structure.
- Keywords
- Floors; INRESB-3D computer program; Earthquake resistant structures; Stiffness methods; Mechanical hysteresis; Walls; Buildings; Earthquake engineering; Computer programming; Elastic properties; Earthquakes; Dynamic structural analysis