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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 91
Edited by: B.H.V. Topping, L.F. Costa Neves and R.C. Barros
Paper 11

Dynamic Analysis Based Seismic Performance Quantification of a Steel Corrugated Shear Wall System

L.G. Vigh1, G.G. Deierlein2, E. Miranda2, A. Liel3 and S. Tipping4

1Department of Structural Engineering, Budapest University of Technology and Economics, Hungary
2Department of Civil and Environmental Engineering, Stanford University, California, USA
3Department of Civil, Environmental and Architectural Engineering, University of Colorado at Boulder, USA
4Tipping Mar and Associates, Berkeley, California, USA

Full Bibliographic Reference for this paper
L.G. Vigh, G.G. Deierlein, E. Miranda, A. Liel, S. Tipping, "Dynamic Analysis Based Seismic Performance Quantification of a Steel Corrugated Shear Wall System", in B.H.V. Topping, L.F. Costa Neves, R.C. Barros, (Editors), "Proceedings of the Twelfth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 11, 2009. doi:10.4203/ccp.91.11
Keywords: corrugated steel shear wall, seismic performance, statistical performance quantification, monotonic backbone curve estimation, pinching hysteretic behaviour, model calibration, pushover analysis, incremental dynamic analysis.

A new approach for the performance evaluation of newly developed seismic resistant systems is proposed by the Applied Technology Council Project 63 (ATC-63, [1]). The methodology is probability based, comprehensive and objective. Determination of seismic parameters using this methodology ensures acceptably low collapse probability of the designed structure. The basis of the approach is the collapse analysis of representative archetypical buildings, considering a large number of actual ground motion records. The method invokes a series of nonlinear static and dynamic analyses using numerical models that are calibrated to monotonic and cyclic test results. The seismic performance quantification is conducted by the statistical evaluation of the numerical results.

In the paper, the authors illustrate a practical application, an alternative bracing system for light-framed steel buildings, a steel corrugated sheet shear wall system, which has been recently developed by Tipping Mar and Associates, California, for use in mid-size residential and commercial structures [2]. It is composed of low-profile corrugated sheet framed by thin-walled cold-formed boundary members. To study the seismic performance of the system, performance parameter estimation is completed in accordance with ATC-63.

Firstly, non-linear static analysis is completed on a detailed shell-element model in order to characterize the static behaviour and find the monotonic backbone curve. Secondly, a simplified model is developed for the use in the parametric performance study. In this, the shear wall is represented by a single uniaxial spring element with combined non-linear material models reflecting the observed pinching hysteretic behaviour. The non-linear cyclic material behaviour can be characterized by fifteen parameters including the cyclic degradation parameters as well. Invoking a genetic algorithm based optimization method, the material model is calibrated to the cyclic test results.

The simplified model is applied for the performance study. Building archetypes representing the possible application ranges of the shear wall are designed and analyzed. Static pushover and incremental non-linear dynamic analysis (with 22 ground motion records) is invoked. The collapse fragility of the structure and the collapse margin ratio is determined and thus the seismic performance of the system is statistically evaluated.

"ATC-63: Recommended Methodology for Quantification of Building System Performance and Response Parameters", 90% Draft, Applied Technology Council, Redwood City, CA, 2008.
B. Stojadinovic, S. Tipping, "Structural testing of corrugated sheet steel shear walls", Research report, University of California, Berkeley, 2007.

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