NEHRP Clearinghouse
- Title
- Seismic Fragility Analysis of Plane Frame Structures.
- File
- PB89131445.pdf
- Author(s)
- Hwang, H. H. M.; Low, Y. K.
- Source
- National Science Foundation, Washington, DC., July 31, 1988, 119 p.
- Identifying Number(s)
- NCEER-88-0028
- Abstract
- The report presents a practical and simplified fragility analysis method for plane reinforced concrete frame structures subject to in-plane earthquake ground accelerations. The frame modeling is based on the approach used in the computer program TABS77. Dynamic characteristics of the structure such as natural frequencies and mode shapes are also obtained using TABS77. The earthquake ground acceleration is represented by a segment of stationary Gaussian random process with mean zero and a Kanai-Tajimi power spectrum. A simplified limit analysis procedure is utilized to determine the failure mechanism and the corresponding story shear capacity of the frame structure. Thus, the limit state used in the study is the failure mechanism established by the simplified limit analysis. For this failure mechanism, the limit state probability of each story, i.e., the story limit state probability, can be evaluated. The fragility curve for the frame structure is generated by evaluating the limit state probability at different levels of peak ground acceleration. A four-story test structure is used for numerical illustration. A five-story building assumed to be located in New York City is also evaluated.
- Keywords
- ; Fragility; Earthquake resistant structures; Vibration; Mechanical hysteresis; Graphs (Charts); Dynamic response; Concrete structures; Loads (Forces); Seismic effects; Mechanical properties; Dynamic structural analysis