Title:
SP-339-11: Recommendations for Modeling the Nonlinear Response of Flexural Reinforced Concrete Walls Using Perform
Author(s):
Laura N. Lowes, Dawn E. Lehman, and Carson Baker
Publication:
Symposium Paper
Volume:
339
Issue:
Appears on pages(s):
173-195
Keywords:
structural walls, finite element modeling, seismic response, flexure
DOI:
10.14359/51724702
Date:
3/1/2020
Abstract:
The PERFORM-3D software package is used commonly in engineering practice to conduct nonlinear dynamic analyses of reinforced concrete walled buildings to their seismic response. However, few studies have evaluated or improved on common modeling approaches for structural concrete walls. The research presented here was conducted to establish best practices for modeling the full nonlinear response of walls exhibiting common flexural failure modes. First, an experimental data set consisting of eight planar concrete walls was collected; these walls were spanned a range of length-to-thickness ratios, shear stress demands, axial load ratios, and longitudinal reinforcement configurations. For each wall specimen, a reference numerical model was created using typical modeling methods as proposed by Powell. Comparison of simulated and measured cyclic response histories show that typical modeling techniques result in relatively inaccurate simulation of cyclic response and very inaccurate simulation of drift capacity. To improve the model accuracy, experimental data were used to determine appropriate values for the steel and concrete material model cyclic response parameters. Experimental data and mathematical definitions for the concrete compressive energy were used to develop recommendations for defining concrete post-peak stress-strain response to achieve accurate, mesh-independent simulation of drift capacity. Finally, recommendations for the minimum number of elements were examined. Comparison of simulated and measured cyclic response histories show that the new modeling recommendation result in accurate, mesh independent simulation of cyclic response, including drift capacity. Future work will evaluate the proposed modeling approach for asymmetric and flanged walls.
Related References:
1. ACI Committee 318, and American Concrete Institute. 2011. Building Code Requirements for Structural Concrete (ACI 318-11) and Commentary. Farmington Hills, MI: American Concrete Institute.
2. Applied Technology Council (ATC) (2010). “Modeling and acceptance criteria for seismic design and analysis of tall buildings,” Prepared by Applied Technology Council for the Pacific Earthquake Engineering Research Center, Redwood City, California, Tech. Rep. Report No. PEER/ATC-72-1.
3. Birely, A.C. (2012), “Seismic performance of slender reinforced concrete walls,” Ph.D. Dissertation, Dept. of Civil and Environmental Engineering, University of Washington, Seattle, WA.
4. Chiaramonte, M.M. (2011). “An analysis of conventional and improved marginal wharves” MS Thesis. University of Washington, Seattle. 217 p.
5. Coleman, J. and Spacone, E. (2001). “Localization issued in force-based frame elements,” Journal of Structural Engineering, ASCE 127(11): 1257–1265.
6. Comite Euro-International du Beton (1993) CEB-FIP Model Code 1990.
7. Dazio, A., Beyer, K. Bachmann, H. (2009). “Quasi-Static Cyclic Tests and Plastic Hinge Analysis of RC Structural Walls,” Engineering Structures 31(7): 1556–71.
8. Jansen D., Shah, S. (1997). “Effect of length on compressive strain softening of concrete,” ASCE Journal of Engineering Mechanics 123(1): 25–35.
9. Mander, J.B., Priestley, M.J.N., Park, R. (1988). “Observed Stress-Strain Behaviour of Confined Concrete,” Journal of Structural Engineering, ASCE 114(8): 1827-1849.
10. Mehta, P.K., Monteiro, P.J.M. (1993). Concrete Structure, Properties and Materials. Prentice-Hall.
11. Mohr, D. (2007). “Nonlinear analysis and performance based design methods for reinforced concrete coupled shear walls,” MS thesis, Dept. of Civil and Environmental Engineering, University of Washington, Seattle, WA, 2007.
12. Nakamura, H., Higai, T. (2001). “Compressive Fracture Energy and Fracture Zone Length of Concrete,” Modeling of Inelastic Behavior of RC Structures Under Seismic Loads, Eds. Shing, P.B. and Tanabe, T., Reston, VA: ASCE.
13. Oesterle, R., Aristizabal-Ochoa, A, Carpenter, J., Russell, H., Corley, W. (1976). Earthquake resistant structural walls - tests of isolated walls, Portland Cement Association/National Science Foundation, Washington, D.C., Tech. Rep. No. NSF/RA-760815.
14. Oh, Y.-H., Han, S.W., Lee, L.-H. (2002). “Effect of Boundary Element Details on the Seismic Deformation Capacity of Structural Walls.” Earthquake Engineering & Structural Dynamics 31(8): 1583–1602.
15. Palermo, D., Vecchio, F. (2002). “Behavior and analysis of reinforced concrete walls subjected to reversed cyclic loading,” Department of Civil Engineering, University of Toronto, Toronto, ON, Tech. Rep. ISBN 0-7727-7553-02, Publication No. 2002-01, 2002
16. Paulay, T., Priestley, M.J.N. (1992). Seismic Design of Reinforced Concrete and Masonry Buildings. John Wiley and Sons.
17. Pugh, J.S., Lowes, L.N., Lehman, D.E. (2015). “Nonlinear line-element modeling of flexural reinforced concrete walls,” Engineering Structures 104: 174-192.
18. Tran, T.A. (2012). “Experimental and Analytical Studies of Moderate Aspect Ratio Reinforced Concrete Structural Walls.” Ph.D. Dissertation, University of California, Los Angeles.
19. Wallace, J.W., Thomsen J.H., (1995). “Seismic Design of RC Structural Walls. Part II: Applications.” Journal of Structural Engineering 121(1): 88–101.
20. Whitman Z. (2015). “Investigation of seismic failure modes in flexural concrete walls using finite element analysis,” MS thesis, University of Washington, Seattle