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A 2D beam-column joint macro-element for the nonlinear analysis of RC frames

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Title: A 2D beam-column joint macro-element for the nonlinear analysis of RC frames
Authors: Panto, B
Caddemi, S
Calio, I
Spacone, E
Item Type: Journal Article
Abstract: Recent earthquakes have shown that the seismic behavior of noncode‐conforming reinforced concrete buildings are in several cases strongly affected by the nonlinear response and possible failure of the beam‐column joints. Beam‐column joint inelasticity is typically due to either shear cracking and failure of the central concrete panel or bond‐slip of the longitudinal steel bars. This paper proposes a new Joint with Hinges macro‐element capable of simulating the most important sources of nonlinearities in the joints. It consists of a quadrilateral central panel whose rigid edges are connected to the beams’ and columns’ end nodes through nonlinear finite‐length interfaces that represent the plastic hinge zones. The central panel deforms in shear only. The joint macro‐element accounts for the nonlinear shear response of the central panel, for the bond‐slip of the longitudinal rebars crossing the joint and for the nonlinear shear and flexural behavior of the plastic hinge zones of the beams and columns connected to the joint. The resulting model of the reinforced concrete frame is the assembly of nonlinear Joint with Hinges macro‐elements connected by elastic frame elements. The proposed formulation is applied in this paper to plane frames. Validation studies with results from available experimental tests on beam‐column joint subassemblages show the proposed model capability to predict the hysteretic responses and the failure mechanisms of connections with unreinforced joints and different beam reinforcement ratios.
Issue Date: Mar-2021
Date of Acceptance: 3-Oct-2020
URI: http://hdl.handle.net/10044/1/85226
DOI: 10.1002/eqe.3375
ISSN: 0098-8847
Publisher: John Wiley and Sons
Start Page: 935
End Page: 954
Journal / Book Title: Earthquake Engineering and Structural Dynamics
Volume: 50
Issue: 3
Copyright Statement: © 2020 John Wiley & Sons Ltd. This is the accepted version of the following article: Pantò, B, Caddemi, S, Caliò, I, Spacone, E. A 2D beam‐column joint macro‐element for the nonlinear analysis of RC frames. Earthquake Engng Struct Dyn. 2020; 1– 20, which has been published in final form at https://doi.org/10.1002/eqe.3375
Keywords: Science & Technology
Technology
Engineering, Civil
Engineering, Geological
Engineering
beam&#8208
column joint
bond&#8208
slip
fiber section
joint element
macro&#8208
modeling
reinforced&#8208
concrete frame
seismic behavior
REINFORCED-CONCRETE BUILDINGS
INCORPORATING BOND-SLIP
OF-PLANE BEHAVIOR
SHEAR-STRENGTH
SEISMIC ASSESSMENT
MODEL
DESIGN
PERFORMANCE
EARTHQUAKE
DEFORMATION
Science & Technology
Technology
Engineering, Civil
Engineering, Geological
Engineering
beam&#8208
column joint
bond&#8208
slip
fiber section
joint element
macro&#8208
modeling
reinforced&#8208
concrete frame
seismic behavior
REINFORCED-CONCRETE BUILDINGS
INCORPORATING BOND-SLIP
OF-PLANE BEHAVIOR
SHEAR-STRENGTH
SEISMIC ASSESSMENT
MODEL
DESIGN
PERFORMANCE
EARTHQUAKE
DEFORMATION
0905 Civil Engineering
Strategic, Defence & Security Studies
Publication Status: Published
Online Publication Date: 2020-11-04
Appears in Collections:Civil and Environmental Engineering
Faculty of Engineering