Browsing by Author "Liel, Abbie"
Now showing 1 - 6 of 6
Results Per Page
Sort Options
- ItemA Performance-Based Evaluation of a Seismic Design Method for Reinforced Concrete Frames(2018) Arroyo, Orlando; Liel, Abbie; Gutiérrez Cid, Sergio
- ItemPerformance based assessment of reinforced concrete frames designed using eigenfrequency optimization(2017) Arroyo, Orlando; Liel, Abbie; Gutierrez Cid, Sergio Enrique
- ItemPractitioner-friendly design method to improve the seismic performance of RC frame buildings(2021) Arroyo, Orlando; Liel, Abbie; Gutierrez Cid, Sergio Enrique
- ItemReinforcement Effects and Parametric Study of the Lateral Response of Multilayered Wood-Frame Shear Walls: An Experimental and Numerical Investigation(American Society of Civil Engineers (ASCE), 2025) Valdivieso Cascante, Diego Nicolas; López-Garcia González, Diego; Liel, Abbie; Guindos Bretones, PabloIn the seismic design of light-frame timber buildings (LFTBs), the use of strong shear walls (SSWs) is crucial for providing lateral resistance. While the contribution of finish layers, such as Type X gypsum wallboard (GWB), has generally been conservatively ignored, recent experimental and numerical studies have demonstrated that these finish layers can significantly enhance the cyclic lateral performance of SSWs, leading to the concept of multilayered strong shear walls (MLSSWs). The effect of the finish layers cannot be solely attributed to additional layers and fasteners. There is also an additional reinforcement effect from deeply screwed Type X GWB that prevents nails from pulling out during hysteresis cycles that has not been previously investigated. The primary objective of this study is to explore the reinforcement effect and evaluate MLSSWs across a broad range of configurations. The research combines experimental tests (monotonic and cyclic) and numerical simulations, with connection-level tests used to calibrate the numerical models. The simulations interrogate the influence of the reinforcement effect and investigate the effects of various parameters, including wall aspect ratio, number of Type X GWB layers, multilayered connection type (screwed or stapled), and overturning anchorage systems. The findings demonstrate the positive effect of finish layers on strength and stiffness. The reinforcement effect of screws and Type X GWB layers is shown to modify the response of nailed OSB-to-frame connections, preventing nail pullout and improving fatigue resistance and deformation capacity. The study shows that the other important parameters that control the strength, stiffness and deformation capacity of MLSSW are multilayered connection type and number of Type X GWB layers. This research enhances the understanding of the role of Type X GWB finish layers on the lateral response of MLSSWs for improved design and construction.
- ItemSeismic fragility assessment, retrofit and functional recovery of reinforced concrete wall buildings(2023) Echeverría Landeta, María José; Liel, Abbie; Jünemann Ureta, Rosita; Pontificia Universidad Católica de Chile. Escuela de IngenieríaReinforced concrete (RC) wall buildings have generally exhibited adequate behavior during recent earthquakes to prevent collapse and protect lives. Nevertheless, significant damage and associated economic losses have been observed. For instance, following the 2010 Chile earthquake, medium-rise RC wall buildings with thin unconfined walls sustained extensive localized brittle damage due to high axial loads. Although only about 2% of this building class displayed significant damage, many similar buildings experienced minor or no damage. This study aimed to assess the seismic performance of RC wall buildings and evaluate the effectiveness of different retrofit strategies in achieving functional recovery goals. The first part of the research focused on the seismic fragility assessment of mediumrise RC wall buildings with high wall densities, thin unconfined walls under high axial loads, and significant vertical irregularities. Finite element models of archetype buildings were developed, and nonlinear time-history analyses were conducted to estimate engineering demand parameters. The results indicated that existing component damage fragility models did not accurately capture the damage in these buildings. Consequently, new damage limit states, better aligned with expected and previously observed damage, were proposed. In the second part of this research, a qualitative analysis with experienced seismic retrofit participants identified barriers and opportunities for functional recovery in seismic retrofit decisions, revealing issues related to costs, tools, guidelines, and communication. Potential opportunities to address these barriers included improving funding mechanisms, enhancing benefit communication, and developing tools and guidelines. Additionally, a study was carried out to quantitatively assess the seismic performance of RC wall buildings before and after retrofitting, focusing on achieving functional recovery goals. Results showed that retrofit strategies, such as adding new RC walls or increasing wall thickness, improved collapse capacity and reduced drift demands, significantly decreasing recovery times despite increased acceleration demands. Modifications are needed to U.S. based seismic assessment frameworks for applicability in Chile and other context.
- ItemShake table testing for system effects analysis in a 1:2 scale three-story light frame timber building(Sage Journals, 2025) Valdivieso Cascante, Diego Nicolás; Quizanga Martínez, Diego Marcelo; Almazán Campillay, José Luis; López-García González, Diego; Liel, Abbie; López, Nicol; Hernández, Francisco; Guindos Bretones, PabloThis study investigates the impact of system effects on the dynamic behavior of light frame timber buildings (LFTBs) through shake table tests and numerical analysis. Here, the term “system effects” encompasses the influence of the transverse shear walls, the out-of-plane bending stiffness of the diaphragms, and the gravity load, particularly in LFTBs with non-planar shear walls. The findings of this research reveal that system effects notably reduce story drift demands and enhance the lateral stiffness and damping ratio of LFTBs with respect to results from numerical models that do not consider component interactions. This observation highlights a discrepancy between the actual lateral stiffness and that predicted by existing models, particularly at relatively small levels of story drift. The underestimation of these engineering parameters is more apparent at the lower stories, underscoring the significant role of the gravity load in amplifying the beneficial effects of the transverse shear walls and the out-of-plane bending stiffness of the diaphragms. These insights are vital to refine the seismic design and analysis of LFTBs and underscore the importance of incorporating system effects into both numerical and analytical models. This enhanced understanding of component interactions in LFTBs sets the stage for increasing adoption of LFTBs as a sustainable and resilient building solution in earthquake-prone areas.