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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Mixed-Type Modeling of Structures with Slender and Deep Beam Elements
Author(s): Jian Liu, Serhan Guner, and Boyan I. Mihaylov
Publication: Structural Journal
Appears on pages(s): 253-264
Keywords: deep beams; macroelement; mixed-type modeling; shear; slender elements
Abstract:The nonlinear analysis of reinforced concrete frame structures with slender members can be performed accurately and efficiently with one-dimensional (1-D) elements based on the plane-sections-remain-plane hypothesis. However, if the frame also includes deep beams which require two-dimensional (2-D) high-fidelity finite element procedures, the analysis of large structures can become very costly. To address this challenge, this paper proposes a mixed-type modeling framework which integrates 1-D slender beam elements with a novel 1-D macroelement for deep beams. The framework is implemented in an existing nonlinear analysis procedure and is used to model 18 deep beam tests and a 20-story frame. It is shown that the proposed modeling framework provides similarly accurate predictions to the 2-D high-fidelity procedures but requires a fraction of the time for modeling and analysis. Furthermore, the macroelement improves the post-peak predictions, and therefore the framework is suitable for evaluating the resilience of structures under extreme loading.
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