3D macroelement approach for nonlinear FE analysis of URM components subjected to in-plane and out-of-plane cyclic loading

2020 ◽  
Vol 220 ◽  
pp. 110951
Author(s):  
E. Minga ◽  
L. Macorini ◽  
B.A. Izzuddin ◽  
I. Caliò
Keyword(s):  
Cyclic Loading ◽  
Fe Analysis ◽  
Nonlinear Fe Analysis ◽  
Out Of Plane

Nonlinear FE analysis of out-of-plane behaviour of masonry walls with and without CFRP reinforcement

2014 ◽  
Vol 54 ◽  
pp. 190-196 ◽  
Author(s):  
Lidia La Mendola ◽  
Matteo Accardi ◽  
Calogero Cucchiara ◽  
Vincenzo Licata
Keyword(s):  
Fe Analysis ◽  
Masonry Walls ◽  
Nonlinear Fe Analysis ◽  
Out Of Plane

Nonlinear FE analysis on stiffness and resistance of bolted cold-formed steel built-up joints

Structures ◽  
2021 ◽  
Vol 33 ◽  
pp. 2520-2533
Author(s):  
Feiliang Wang ◽  
Yan Han ◽  
Jian Yang
Keyword(s):  
Fe Analysis ◽  
Nonlinear Fe Analysis ◽  
Cold Formed Steel

scholarly journals A Practical Finite Element Modeling Strategy to Capture Cracking and Crushing Behavior of Reinforced Concrete Structures

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 506 ◽  
Author(s):  
Alexandre Mathern ◽  
Jincheng Yang
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Constitutive Relations ◽  
Fe Analysis ◽  
Rc Beams ◽  
Cracking Behavior ◽  
Concrete Cracking ◽  
Rc Structures ◽  
Nonlinear Fe Analysis ◽  
Modeling Strategy

Nonlinear finite element (FE) analysis of reinforced concrete (RC) structures is characterized by numerous modeling options and input parameters. To accurately model the nonlinear RC behavior involving concrete cracking in tension and crushing in compression, practitioners make different choices regarding the critical modeling issues, e.g., defining the concrete constitutive relations, assigning the bond between the concrete and the steel reinforcement, and solving problems related to convergence difficulties and mesh sensitivities. Thus, it is imperative to review the common modeling choices critically and develop a robust modeling strategy with consistency, reliability, and comparability. This paper proposes a modeling strategy and practical recommendations for the nonlinear FE analysis of RC structures based on parametric studies of critical modeling choices. The proposed modeling strategy aims at providing reliable predictions of flexural responses of RC members with a focus on concrete cracking behavior and crushing failure, which serve as the foundation for more complex modeling cases, e.g., RC beams bonded with fiber reinforced polymer (FRP) laminates. Additionally, herein, the implementation procedure for the proposed modeling strategy is comprehensively described with a focus on the critical modeling issues for RC structures. The proposed strategy is demonstrated through FE analyses of RC beams tested in four-point bending—one RC beam as reference and one beam externally bonded with a carbon-FRP (CFRP) laminate in its soffit. The simulated results agree well with experimental measurements regarding load-deformation relationship, cracking, flexural failure due to concrete crushing, and CFRP debonding initiated by intermediate cracks. The modeling strategy and recommendations presented herein are applicable to the nonlinear FE analysis of RC structures in general.

Ductile Crack Propagation Simulation of a Cylinder With a Through-Wall Circumferential Flaw Under Excessive Cyclic Torsion Loading

2014 ◽  
Author(s):  
Kiminobu Hojo ◽  
Daigo Watanabe ◽  
Shinichi Kawabata ◽  
Yasufumi Ametani
Keyword(s):  
Cyclic Loading ◽  
Crack Growth ◽  
Rotation Angle ◽  
Fe Analysis ◽  
The Other ◽  
J Integral ◽  
Ductile Crack ◽  
Elastic Plastic ◽  
Cyclic Torsion ◽  
Ductile Crack Growth

A lot of applications of elastic plastic FE analysis to flawed structural fracture behaviors of mode I have been investigated. On the other hand the analysis method has not been established for the case of the excessive cyclic torsion loading with mode II or III fracture. The authors tried simulating the fracture behavior of a cylinder-shaped specimen with a through-walled circumferential flaw subjected to excessive monotonic or cyclic loading by using elastic plastic FE analysis. Chaboche constitutive equation of the used FE code Abaqus was applied to estimate the elastic plastic cyclic behavior. As a result in the case of monotonic loading without crack extension, the relation of torque-rotation angle of the experiment was estimated well by the simulation. Also J-integral by the Abaqus’ function agreed with a simplified J-equation using the calculated torque-rotation angle relation. On the other hand under load controlled cyclic loading associated with ductile crack growth, the calculated torque-rotation angle relation did not agree with the experimental one because of high sensitivity of the used stress-strain curve. J-integral from Abaqus code did not increase regardless of the accumulated crack growth and plastic zone. Several simplified ΔJ calculations tried to explain the experimental ductile crack growth and it seemed that da/dN-ΔJ relation follows the Paris’ law. From these examinations an estimation procedure of the structures under excessive cyclic loading was proposed.

Nonlinear FE analysis of precast RC pinned beam-to-column connections under monotonic and cyclic shear loading

2013 ◽  
Vol 12 (4) ◽  
pp. 1615-1638 ◽  
Author(s):  
Georgia D. Kremmyda ◽  
Yasin M. Fahjan ◽  
Spyros G. Tsoukantas
Keyword(s):  
Shear Loading ◽  
Fe Analysis ◽  
Cyclic Shear ◽  
Nonlinear Fe Analysis

scholarly journals Structural Redundancy Assessment of Adjacent Precast Concrete Box-Beam Bridges in Service

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Yanling Leng ◽  
Jinquan Zhang ◽  
Ruinian Jiang ◽  
Yangjian Xiao
Keyword(s):  
Precast Concrete ◽  
Fe Analysis ◽  
Load Testing ◽  
Structural Redundancy ◽  
Simplified Approach ◽  
Box Beam ◽  
Nonlinear Fe Analysis ◽  
Redundancy Level ◽  
Real Behavior

Present approaches for assessing bridge redundancy are mainly based on nonlinear finite element (FE) analysis. Unfortunately, the real behavior of bridges in the nonlinear range is difficult to evaluate and a sound basis for the nonlinear FE analysis is not available. In addition, a nonlinear FE analysis is not feasible for practitioners to use. To tackle this problem, a new simplified approach based on linear FE analysis and field load testing is introduced in this paper to address the particular structural feature and topology of adjacent precast concrete box-beam bridges for the assessment of structural redundancy. The approach was first experimentally analyzed on a model bridge and then validated by a case study. The approach agrees well with the existing recognized method while reducing the computation complexity and improving the reliability. The analysis reveals that the level of redundancy of the bridge in the case study does not meet the recommended standard, indicating that the system factor recommended by the current bridge evaluation code for this bridge is inappropriate if considering the field condition. Further research on the redundancy level of this type of bridges is consequently recommended.

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