NEHRP Clearinghouse
- Title
- Effects of Torsion on the Linear and Nonlinear Seismic Response of Structures.
- File
- PB92193002.pdf
- Author(s)
- Sedarat, H.; Bertero, V. V.
- Source
- National Science Foundation, Washington, DC., September 1990, 344 p.
- Identifying Number(s)
- UCB/EERC-90/12
- Abstract
- The results of linear-elastic static and dynamic analyses of a seven-story reinforced concrete frame-wall structure are presented and the importance of factors such as static lateral load profiles, static eccentricity ratio, and accidental eccentricity on the lateral-torsional response of structures is discussed in the report. A discussion about mathematical modeling of structures for nonlinear analyses is presented. The computer program FACTS and its nonlinear three-dimensional reinforced concrete beam column element are employed in the research. Nonlinear static responses of the seven-story structure to two sets of monotonically increasing lateral loads, with triangular and uniform profiles, are studied. A realistic model of a seven-story structure, that represents typical frame-wall systems, is developed. The importance of such parameters as non-uniform distribution of mass, unsymmetrical distribution of yielding strength in the plan of the structure, and intensity of earthquake ground motion on the seismic response of a building is discussed in detail.
- Keywords
- Reinforced concrete; Structural vibration; Torsion; Seismic waves; Mathematical models; Earth movements; Shear properties; Dynamic response; Dynamic structural analysis; Earthquake engineering; Concrete structures; Bending moments; FACTS computer program; Linear systems; Structural members; Building codes