Advances in Structural Engineering Research
Full Session with Abstracts
337103-1 - Numerical Prediction of the Behavior of Reinforced Concrete Shear Walls under in-Plane Cyclic Loading, with Particular Focus on Assessing Local Cracking Response
Friday, April 20
1:30 PM - 3:00 PM
How does this session impact and improve the Structural Engineering Profession?
This work validates existing tools for design-level analysis, thus it provides a significant benefit to the Structural Engineering profession, on a global scale. The proposed model to predict the behavior of RC shear walls subjected to lateral loading may impact future studies in seismic design, analysis, and codes development.
Coupling between flexure and shear responses affects the global behavior of reinforced concrete shear walls when subjected to in plane cyclic loading. Recent work has offered the capability to capture shear-flexure interaction via a vertical line element model within the academic grade OpenSees platform (denoted as the SFI-MVLEM model by Kolozvari et al., 2014). Although this model is validated through comparison with the cyclic wall testing of Tran in 2012, evaluation across a wider experimental dataset is important to increase confidence in its future use by national and international structural engineers. In particular, for concrete shear walls, which often serve as the essential (and/or sole) lateral load-carrying element in buildings, assessment of the predictive potential in the context of evaluating local crack pattern is needed. A better prediction of the response of reinforced concrete shear walls will improve the accuracy of the design and make the designer’s job more efficient.
In this work, we evaluate the effectiveness of the SFI-MVLEM numerical model in predicting the behavior of RC shear walls subjected to in plane cyclic loading sans ad hoc tuning, by modeling a wide variety of previously tested walls. We derive an estimation of the crack widths developed at the end of testing, using the smeared crack approach. Results for two wall specimens known to produce a different response under in-plane cyclic loading are of particular interest, namely: 1) a wall specimen designed detailed to develop a ductile behavior under cyclic loading, by Dazio et al. tested in 2009, and 2) a wall specimen designed with minimum reinforcement ratios, by Lu et al. tested in 2016.
The simulations presented in this paper demonstrate the reasonable predictive capability without an ad hoc tuning of the model parameters, with regard to global force-drift response, global crack pattern and residual crack widths. In this regard, the utility of the model in the context of design-level analysis is discussed.
What will the audience take away from your presentation?
The validation of the prediction for the lateral response of reinforced concrete shear walls presented in this work will motivate future research on the topic, possibly leading to code improvements. It will also directly benefit professionals in structural design, providing confidence on a recent developed analytical model of great interest.