scholarly journals Flexural Behavior of Prestressed Steel-Concrete Composite Members with Discontinuous Webs

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Jae Yuel Oh ◽  
Deuck Hang Lee ◽  
Sang Hum Cho ◽  
Hyun Kang ◽  
Hae-Chang Cho ◽  
...  
Keyword(s):  
Experimental Studies ◽  
Nonlinear Finite Element ◽  
Flexural Behavior ◽  
Steel Beams ◽  
Steel Beam ◽  
Analysis Model ◽  
Element Analysis ◽  
Accordion Effect ◽  
Materials Used ◽  
Flexural Tests

The corrugated webbed prestressed (CWPS) composite member was developed to improve the efficiency of the prestress introduced into the steel beam, and experimental studies were performed to examine its structural behavior. Additionally, a unified analysis model that can estimate the nonlinear flexural behavior of the composite member and the accordion effect of the corrugated webbed steel beams at the prestressing stage was proposed. As a consecutive experimental series, in this study, the discontinuous-webbed prestressed (DWPS) composite member was developed, and this innovative composite member can reduce the amount of steel materials used, compared with the former CWPS composite member. Flexural tests were carried out to investigate their structural performances, and their behaviors were analyzed in detail by a nonlinear finite element analysis.

Analysis of Nonlinear Flexural Behavior of Thick Composites With Fiber Waviness

1999 ◽  
Author(s):  
H.-J. Chun ◽  
S. W. Lee ◽  
I. M. Daniel
Keyword(s):  
Finite Element ◽  
Composite Plate ◽  
Current Model ◽  
Geometrical Nonlinearity ◽  
Mapping Method ◽  
Flexural Behavior ◽  
Analysis Model ◽  
Element Analysis ◽  
Fiber Waviness ◽  
Thick Composites

Abstract A finite element analysis model was developed to predict flexural behavior of thick composites with uniform, graded and localized fiber waviness. In the analyses, material and geometrical nonlinearties due to fiber waviness were incorporated into the model utilizing energy density and an incremental method. In the model, two kinds of geometrical nonlinearity were considered, one due to reorientation of fibers and the other due to difference of curvatures from one finite element to another during deformation. The finite element analyses utilize the iterative mapping method to incorporate these geometrical nonlinear factors. The model was used to predict not only the flexural behavior of a flat thick composite plate but also of a thick composite plate with initial curvature. Flat composite specimens with various degrees of fiber waviness were fabricated and four-point flexural tests were conducted. The predicted nonlinear behavior by the current model was compared with results from the thin slice model [7] and experiments. Good agreement was observed among them.

scholarly journals Flexural Behavior of Steel Beam Strengthening by Prestressing Strands

2018 ◽  
Vol 7 (4.20) ◽  
pp. 572
Author(s):  
Dr. Mohammed M. Rasheed ◽  
Mr. Ali F. Atshan ◽  
Mr. Kamal Sh. Mahmoud
Keyword(s):  
Reference Beam ◽  
Flexural Behavior ◽  
Radius Of Curvature ◽  
Steel Beams ◽  
Steel Beam ◽  
Bottom Flange ◽  
Moment Capacity ◽  
External Prestressing ◽  
Prestressing Strands ◽  
The Moment

Seven simply supported steel beams were tested to explain the effect of strengthening by external prestressing strands. All of the beams have the same steel section, clear span length and the strengthening samples which implemented by two external prestressing strands. The tested beams are divided into two categories according to existing of external prestressing strands, the first category consists of one steel beam as a reference, while, the second group deals with steel beams strengthening by external prestressing strands and consists of six steel beams divided according to the eccentricity location of prestressing strand with jacking stress (815 MPa). From experimental results, it was found that the moment curvature curves behavior for the tested beams are stiffer and with less ductility than the reference beams and the ultimate moment capacity is increased with increasing the eccentricity location. While, the maximum radius of curvature at bottom flange decreases with increasing the eccentricity location as compare with the reference beam.   

Nonlinear Finite Element Analysis for the Flexural Behavior of Concrete Beams Reinforced with CFRP-PCPs Composite Rebars

2013 ◽  
Vol 368-370 ◽  
pp. 953-956
Author(s):  
Jiong Feng Liang ◽  
Ze Ping Yang ◽  
Ping Hua Yi ◽  
Zhi Ming Qiu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Concrete Beams ◽  
Nonlinear Finite Element Analysis ◽  
Nonlinear Finite Element ◽  
Flexural Behavior ◽  
Analytic Model ◽  
Structural Form ◽  
Element Analysis ◽  
Steel Rebar

The nonlinear finite element analysis for the flexural behavior of the concrete beams reinforced with CFRP-PCPs Composite Rebars,which was a new structural form, has been studied in ANSYS. The effects of material nonlinearities of concrete £¬steel rebar £¬CFRP rebar were considered in the analytic model. Load-displacement curves were received through calculation in this paper. Compared the present result with the experimental results has proved that the model provided is correct and convenient for the analysis of the beams.

Modeling the effect of corrosion on bond strength at the steel–concrete interface with finite-element analysis

2006 ◽  
Vol 33 (6) ◽  
pp. 673-682 ◽  
Author(s):  
Lamya Amleh ◽  
Alaka Ghosh
Keyword(s):  
Finite Element ◽  
Friction Coefficient ◽  
Bond Strength ◽  
Mass Loss ◽  
Contact Pressure ◽  
Experimental Studies ◽  
Nonlinear Finite Element ◽  
Mechanical Interaction ◽  
Element Analysis ◽  
Concrete Interface

This paper examines the basic influence of corrosion on bond strength at the steel–concrete interface and the associated slip and cracking. A nonlinear finite-element model is developed to account for the effect of corrosion on deterioration of the bond. Deterioration of the mechanical interaction between the corroding reinforcing steel and the concrete is modeled with the nonlinear finite-element program ABAQUS. The contact pressure normal to the steel–concrete interface is reduced when the concrete cracks, which occurs along with a decrease in the cross-sectional area of the steel bar and the decrease of the friction coefficient between the steel and the concrete. The loss of contact pressure and the decrease in the friction coefficient with the mass loss of steel bars are evaluated using pullout test specimens with different levels of rebar corrosion. Finally, the relationship between the loss of bond strength and the mass loss of the steel rebar is established. The model gives reasonably accurate predictions of bond strength for three independent experimental studies. Key words: bond, concrete, corrosion, mechanical interaction, reinforcing steels, slip, steel-concrete interface.

Nonlinear Finite Element Analysis for the Flexural Behavior of Concrete Beams Strengthened with NSM CFRP-PCPs Composite Bars

2014 ◽  
Vol 584-586 ◽  
pp. 925-928
Author(s):  
Jiong Feng Liang ◽  
Ze Ping Yang ◽  
Ping Hua Yi ◽  
Jian Bao Wang
Keyword(s):  
Finite Element ◽  
Concrete Beams ◽  
Nonlinear Finite Element ◽  
Flexural Behavior ◽  
Load Carrying Capacity ◽  
Rc Beams ◽  
Element Analysis ◽  
Four Point Bending ◽  
Load Carrying ◽  
Bending Loading

This paper presents the development of a detailed 3D nonlinear finite element (FE) numerical model that can accurately predict the load-carrying capacity and response of RC beams strengthened with NSM CFRP-PCPs composite bars subjected to four-point bending loading. The predicted FE mid-span deflection responses agreed very well with the corresponding measured experimental tested data at all stages of flexural loading.

Behavior of through Beam Connections Composed of CFSST Columns and Steel Beams by Finite Element Studying

2010 ◽  
Vol 168-170 ◽  
pp. 2329-2333 ◽  
Author(s):  
Mohammad Mehdi Arabnejad Khanouki ◽  
Nor Hafizah Ramli Sulong ◽  
Mahdi Shariati
Keyword(s):  
Finite Element ◽  
Shear Failure ◽  
Nonlinear Finite Element ◽  
Steel Beams ◽  
Steel Beam ◽  
Finite Element Models ◽  
Shear Plate ◽  
Rigid Connection ◽  
Abaqus Software ◽  
Monotonic Load

Recent studies show that a through beam connections composed of concrete filled square steel tubular column and steel beam have been identified as an ideal rigid connection. In this paper a 3-D nonlinear finite element models were conducted for CFSST column and steel beam connection under monotonic load using ABAQUS software. Each model includes a CFSST column and single steel beam passing through the column. The main scopes are to identify the modes of beam failure and joint shear failure. In addition the effect of an extra shear plate welded to beam web inside the column was investigated. This result can be used for designing of through beam connection.

Failure Mechanism Analysis of Tubular X-Joint under Lateral Impact Force

2014 ◽  
Vol 578-579 ◽  
pp. 45-48
Author(s):  
Sheng Zhi Song ◽  
Jian Jun Wei
Keyword(s):  
Finite Element ◽  
Failure Mechanism ◽  
Impact Force ◽  
Nonlinear Finite Element ◽  
Mechanism Analysis ◽  
Nonlinear Finite Element Method ◽  
Lateral Impact ◽  
Analysis Model ◽  
Element Analysis ◽  
Fea Model

To study the failure mechanism of tubular X-joint under lateral impact force, the nonlinear finite element method is adopted to simulate theoretical analysis model of tubular X-joint. Before analysis, the precision of finite element analysis (FEA) model is verified based on experimental data firstly. On the base of analyzing mechanism for tubular X-joint under lateral impact loading, the development law of deformation and stress is clarified, and energy transform pattern and the varying rules of impact force-deformation curve is analyzed.

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