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Keywords: reinforced concrete, structural walls, variance-based sensitivity analysis, uncertainty, probability.

Summary

Generally, the perception of structural behavior is affected by various sources of uncertainty from material properties to loading conditions. In order to design reliable structures, therefore, we should be able to properly capture these uncertainties in the analysis/design process. In this paper, we investigate the sensitivity properties of the global response of RC structural walls. To accomplish this goal, the very well-known multiple-vertical-line-element-model (MVLEM) was chosen to be studied using sensitivity analysis. The model is used to represent RC wall elements with variable aspect ratios, boundary elements sizes, reinforcement layouts, material properties and axial loads. The aforementioned parameters were to vary within practical design ranges. The models were built using the OpenSees platform. Nonlinear static pushover analysis was performed on each of the sample walls. Later, performance points were located on the pushover curves according to the recommendations of FEMA356. The base moments at collapse prevention and life safety normalized to the base moment at immediate occupancy were selected as the outputs of the models, the sensitivity properties of which were of interest. Variance-based sensitivity analysis was performed in order to understand how the uncertainty in the input propagated to the output through the model. The corresponding results, presented here, highlight the influential parameters among those studied. In addition, the applicability of the models to certain ranges of the input parameters is discussed. Having known the sensitivity properties of the wall performance, we can decide whether the chosen model is an appropriate choice for a specific design case and which parameters need more careful attention in case the model is appropriate.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 102 PROCEEDINGS OF THE FOURTEENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING Edited by: Paper 86 An Investigation into the Sensitivity Properties of the Global Response of Reinforced Concrete Structural Walls S. Marzban¹, M. Leipold² and J. Schwarz² ¹Graduiertenkolleg 1462, Faculty of Civil Engineering Bauhaus-Universität Weimar, Weimar, Germany ²Earthquake Damage Analysis Center, Faculty of Civil Engineering Bauhaus-Universität Weimar, Weimar, Germany doi:10.4203/ccp.102.86 purchase the full-text of this paper Full Bibliographic Reference for this paper S. Marzban, M. Leipold, J. Schwarz, "An Investigation into the Sensitivity Properties of the Global Response of Reinforced Concrete Structural Walls", in , (Editors), "Proceedings of the Fourteenth International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 86, 2013. doi:10.4203/ccp.102.86 Keywords: reinforced concrete, structural walls, variance-based sensitivity analysis, uncertainty, probability. Summary Generally, the perception of structural behavior is affected by various sources of uncertainty from material properties to loading conditions. In order to design reliable structures, therefore, we should be able to properly capture these uncertainties in the analysis/design process. In this paper, we investigate the sensitivity properties of the global response of RC structural walls. To accomplish this goal, the very well-known multiple-vertical-line-element-model (MVLEM) was chosen to be studied using sensitivity analysis. The model is used to represent RC wall elements with variable aspect ratios, boundary elements sizes, reinforcement layouts, material properties and axial loads. The aforementioned parameters were to vary within practical design ranges. The models were built using the OpenSees platform. Nonlinear static pushover analysis was performed on each of the sample walls. Later, performance points were located on the pushover curves according to the recommendations of FEMA356. The base moments at collapse prevention and life safety normalized to the base moment at immediate occupancy were selected as the outputs of the models, the sensitivity properties of which were of interest. Variance-based sensitivity analysis was performed in order to understand how the uncertainty in the input propagated to the output through the model. The corresponding results, presented here, highlight the influential parameters among those studied. In addition, the applicability of the models to certain ranges of the input parameters is discussed. Having known the sensitivity properties of the wall performance, we can decide whether the chosen model is an appropriate choice for a specific design case and which parameters need more careful attention in case the model is appropriate. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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