Experimental assessment of damping in low aspect ratio, reinforced concrete shear wall structure
This report summarizes the experimental data obtained from the Seismic Category 1 Structures Program concerning damping in low aspect ratio, reinforced concrete shear wall structures. This program, that is sponsored by the United States Nuclear Regulating Research, has tested 37 shear wall structures and structures and structural elements both statically (monotonic and cyclic) and dynamically (sine sweep, random, simulated seismic, and impulse). Data from these tests have been analyzed by four different methods to determine equivalent viscous damping ration that can be used in the analysis of shear wall structures. These methods are: (1) frequency response function analysis, (2) the log decrement method, (3) the hysteretic energy loss method, and (4) the flow response spectra matching method. The floor response spectra matching method is, to the author's knowledge, new and provides the most general method for assessing a variety of damping mechanisms. Results from the various methods were generally consistent and the damping values were found to be in the range specified by current regulatory guides. A discussion of the various damping mechanisms, how damping mechanisms affect the equations of motion, the effects of the type of loading on the various methods used to determine the damping, and other investigators' results are also presented. 22 refs., 15 figs., 11 tabs.
- Research Organization:
- US Nuclear Regulatory Commission (NRC), Washington, DC (United States). Div. of Engineering; Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6909952
- Report Number(s):
- NUREG/CR-5154; LA-11325-MS; ON: TI88015465
- Country of Publication:
- United States
- Language:
- English
Similar Records
Damping in low-aspect-ratio, reinforced concrete shear walls
Nonlinear seismic response of small reinforced-concrete shear wall structures
Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
WALLS
SEISMIC EFFECTS
ASPECT RATIO
CONCRETES
DAMPING
EXPERIMENTAL DATA
SHEAR
TESTING
BUILDING MATERIALS
DATA
INFORMATION
MATERIALS
NUMERICAL DATA
420200* - Engineering- Facilities
Equipment
& Techniques
220900 - Nuclear Reactor Technology- Reactor Safety