NEHRP Clearinghouse
- Title
- Hysteresis Identification of Multi-Story Buildings.
- File
- PB81235921.pdf
- Author(s)
- Toussi, S.; Yao, J. T. P.
- Source
- National Science Foundation, Washington, DC., May 1981, 96 p.
- Identifying Number(s)
- CE-STR-81-15
- Abstract
- Results of the estimation of the behavior of multi-degree-of-freedom (MDOF) structural systems are reported. First, the hysteresis identification method and the corresponding error criterion are presented. The error criterion is a least-squares estimation procedure which is applied to both a constrained and an unconstrained problem. Then, a lumped-mass model used to form 'M' different independent responses from the response of an 'M' degrees of freedom structure is described. The model allows each one of the 'M' responses to be considered as the output of a single-degree-of-freedom (SDOF) structural system. Finally, the identification technique is applied to estimate the inter-story behavior of a laboratory tested, reinforced concrete frame. In addition, the effect of damping in the response of high-rise buildings was examined. The investigation focused on determining whether damping force plays a significant role in the nature of the structural response.
- Keywords
- Earthquake resistant structures; Mechanical hysteresis; Damping; Degrees of freedom; Buildings; Earthquake engineering; Concrete structures; Error analysis; Least squares method