Analytical Model for Compressive Arch Action in Horizontally Restrained Beam-Column Subassemblages

ABOUT THE 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.

International Concrete Abstracts Portal

  


Title: Analytical Model for Compressive Arch Action in Horizontally Restrained Beam-Column Subassemblages

Author(s): Shao-Bo Kang and Kang Hai Tan

Publication: Structural Journal

Volume: 113

Issue: 4

Appears on pages(s): 813-826

Keywords: analytical model; beam-column subassemblage; compressive arch action; engineered cementitious composites; pseudo-static resistance

Date: 7/1/2016

Abstract:
This paper presents an analytical model to predict the compressive arch action (CAA) of reinforced concrete beam-column subassemblages. In the model, a new method is proposed to quantify the strains of longitudinal reinforcement in the beam. Instead of equivalent rectangular concrete stress block, the constitutive model for concrete is employed to calculate the compression force sustained by concrete. Besides, tensile strength of engineered cementitious composites can also be considered. Comparisons between experimental and analytical results indicate that the model yields reasonable accuracy in predicting the CAA capacity and horizontal compression force of subassemblages. The effects of horizontal restraints on the CAA capacity of subassemblages are also investigated through the model. Furthermore, pseudo-static resistance of beam-column subassemblages is calculated based on the energy balance method. Finally, conclusions on the enhancement of CAA to structural resistance are drawn from analytical results.