Abstract
Results from a series of experiments designed to measure the stiffness of low-aspect-ratio, reinforced-concrete shear walls subjected to simulated seismic inputs on a shake table are reported. The geometry of the test structures allows them to be modeled as single-degree-of-freedom systems. Forces were estimated from accelerometer measurements on masses attached to the structures. Dynamic relative-displacement measurements were obtained from groups of strain gages wired in series to act as one continuous gage. Because this method measures relative displacements, potential sources of error associated with unspecified base motion are avoided. tiffness values determined from the relative displacement measurements were compared with stiffness values determined indirectly from frequency-response functions. Measured, accelerometer data were used to calculate the frequency-response functions. The stiffness values determined from the relative-displacement measurements gave results similar to those given by mechanics-of-materials beam theory that accounts for shear deformation. The stiffness values determined from the frequency-response functions were considerably less than those from the theory.
Similar content being viewed by others
References
Farrar, C.R. andBaker, W.E., “Stiffness and Hysteretic Energy Loss of a Reinforced Concrete Shear Wall,”.Experimental Mechanics,30 (1),95–101 (March1990).
Bertero, V., “The Response of Shear Walls Subject to Dynamic Loads,”, PhD Diss., Dept. of Civil and Sanitary Eng., MIT (1957).
Antebi, J., “Model Analysis of the Response of Shear Walls to Dynamic Loads,” PhD Diss., Dept. of Civil and Sanitary Eng., MIT (1961).
Aristizabal-Ochoa, J., “Cracking and Shear Effects on Structural Walls,”Amer. Soc. Civ. Engrs. Proc (J. Structural Div.),109 (5),1267–1277 (May1985).
Enderbrock, E.G., Dove, R.C. and Dunwoody, W.E., “Analysis and Test on Small-Scale Shear Walls, FY-82 Final Report,” Los Alamos Nat. Lab. Rep. LA-10443-MS (Sept. 1985).
Bennett, J.G., et al., Seismic Category I Structures Program: Final Report, FY 1983–84, Los Alamos Nat. Lab. Rep. LA-11013-MS (Sept. 1987).
Bennet, J.G. et al., “Simulated Seismic Tests on 1/42- and 1/14-Scale Category I, Auxiliary Buildings,” Los Alamos Nat. Lab. Rep. LA-11093 (Oct. 1987).
Bennett, J.G., et al., “The Seismic Category I Structures Program: Results for FY 1985,” Los Alamos Nat. Lab. Rep. LA-11117-MS (Dec. 1987).
Bennett, J.G. et al., “The Seismic Category I Structures Program: Results for FY 1986”, Los Alamos Nat. Lab. Rep. LA-11377-MS (Sept. 1988).
Baker, W.E. and Farrar, C.R., “Measurement of Dynamic Relative Displacements,”Experimental Mechanics,32 (2), (June1992).
“Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates,” Annual Book of ASTM Standards, ed. R.A. Prieman-Storer Amer. Soc. Test. and Mat.,4.02 (C136-84a),98–102 (1985).
Popov, E.G., Introduction to Mechanics of Solids, Prentice-Hall, Englewood Cliffs, NJ, 488–504 (1969).
Timoshenko, S., Young, D.H. andWeaver, W., Vibration Problems in Engineering, John Wiley & Sons, New York, 31–40 (1974).
Hibbitt, Karlssen and Sorensen, ABAQUS: User's Manual, Version 4.8, Providence, RI (1989).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Farrar, C.R., Baker, W.E. Measuring the stiffness of concrete shear walls during dynamic tests. Experimental Mechanics 32, 179–183 (1992). https://doi.org/10.1007/BF02324730
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02324730