Development of a plasticity bond model for steel reinforcement

Cox, Jim; Herrmann, Leonard R.

doi:10.1002/(sici)1099-1484(199804)3:2<155::aid-cfm45>3.0.co;2-s

Cited by 82 publications

(41 citation statements)

References 12 publications

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“…According to Cox and Herrmann [28,29], bond models can be developed at three different scales, the ribscale, where the geometry of the surface structure of the bar is modeled explicitly; and the barscale and the memberscale, where 1 the method is not non-local in the constitutive sense as described above the reinforcement is discretized via a discrete, embedded or smeared model.…”

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confidence: 99%

A geometrically non-linear three-dimensional cohesive crack method for reinforced concrete structures

Rabczuk

Bordas

et al. 2008

Engineering Fracture Mechanics

278

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A three dimensional meshfree method for modeling arbitrary crack initiation and crack growth in reinforced concrete structure is presented. This meshfree method is based on a partition of unity concept and formulated for geometrically nonlinear problems. The crack kinematics are obtained by enriching the solution space in order to capture the correct crack kinematics. A cohesive zone model is used after crack initiation. The reinforcement modeled by truss or beam elements is connected by a bond model to the concrete. We applied the method to model the fracture of several reinforced concrete structures and compared the results to experimental data.

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confidence: 99%

A geometrically non-linear three-dimensional cohesive crack method for reinforced concrete structures

Rabczuk

Bordas

et al. 2008

Engineering Fracture Mechanics

278

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“…Depending on various factors, such as concrete cover, either spalling or pull-out failure occurs. The description of the shear behaviour is based on the model developed by COX & HERRMANN [5], [6]. The shear strains ε = 1 D b · δ are defined as the relative displacements δ = u c − u s between concrete and steel, non-dimensionalized by the bar diameter D b and are divided into two parts ε = ε el + ε in as an elasto-plastic material model.…”

Section: Model Equationsmentioning

confidence: 99%

Numerical analysis of reinforced concrete structures with particular focus on bond behaviour

Stein

Kowalsky

Dinkler

2016

Proc Appl Math and Mech

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A non-linear bond model is presented, capturing bond behaviour between concrete and reinforcing ribbed steel bars. An existing model, where coupled thermal-hygric-mechanical-chemical (THMC-) processes are already modelled for pure concrete, will be extended by the presented bond model. Against this background and due to the resulting requirements the approach of a geometrically consistent consideration of the reinforcement is chosen, neglecting the bar ribs in the geometric model. All bond mechanisms are considered by the additional bond model in between concrete and reinforcement. With this procedure the principle of a formal treatment and general description, used in the existing model describing the different processes, is not only continued, but also transferred regarding the three components concrete, steel and bond. The bond model is discretized by interface elements, which describe curved surfaces in 3D space. The presented non-linear bond model incorporates the mechanical interaction of the bar rips with adjacent concrete as well as the damage of the bond zone.

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“…There are three principal elements that contribute to bond resistance: chemical adhesion, frictional resistance, and mechanical interlock due to bearing action between bar ribs and concrete. Adhesion occurs due to the chemical bonding between the cement and the bar as well as the effect of shrinkage stresses that develop during curing; moreover, adhesion depends on the properties of the material around the bar [2]. The frictional resistance and bearing action become effective after the chemical adhesion breaks down.…”

Section: Figure 1 Grouted Sleeve Connectormentioning

confidence: 99%

Bond behavior of the reinforcement bar in GFRP connector

2014

JCE

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Bond behavior of the reinforcement bar in glass fiber-reinforced polymer connectorThis paper presents the bond stress -slip behavior of a newly developed grouted splice connection fabricated by glass fiber-reinforced polymer (GFRP). A total of twenty seven specimens were tested under increasing axial tension load. Results from the test specimens were adapted to model a bond stress -slip law to be compared with the requirements provided by design codes and provisions. The results show that by reducing mid-length diameter, higher bond strength and load capacity are generated in the tapered splice sleeves. Prionljivost armaturne šipke u spoju od polimera armiranog vlaknima U ovom se radu prikazuje ispitivanje prianjajna i proklizavanja armaturne šipke u novorazvijenoj injektiranoj spojnici sa staklenim vlaknima (eng. glass fiberreinforced polymer -GFRP). Ukupno dvadeset sedam uzoraka ispitano je postupnim povećavanjem osnog vlačnog opterećenja. Rezultati dobiveni ispitivanjem uzoraka usvojeni su za modeliranje ovisnosti naprezanje prianjanja -proklizavanje, što je uspoređeno sa zahtjevima iz normi i odredbi. Rezultati pokazuju da se u konusnim spojnicama razvija veća čvrstoća prianjanja i otpornost na opterećenje usporedo sa smanjenjem promjera u srednjem dijelu. Verbundverhalten von Bewehrungsstahl in Verbindungen aus glassfaserverstärktem PolymerIn dieser Arbeit wird das Haft-und Rutschverhalten einer neu entwickelten mit glassfaserverstärktem Polymer (GFRP) verarbeiten Spleißverbindung dargestellt. Insgesamt sind siebenundzwanzig Proben unter steigenden axialen Zugkräften untersucht worden. Der Einfluss wichtiger Parameter, wie z.B. des inneren Durchmessers der GFRP Verbindung und der Anzahl verwendeter Lagen aus GFRP, ist überprüft worden. Die Versuchsresultate sind angewandt worden, um ein Haftungs-und Rutschverhaltensgesetz aufzustellen und das gegebene Model mit den Anforderungen bestehender Regelwerke und Bestimmungen zu vergleichen.

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Development of a plasticity bond model for steel reinforcement

Cited by 82 publications

References 12 publications

A geometrically non-linear three-dimensional cohesive crack method for reinforced concrete structures

A geometrically non-linear three-dimensional cohesive crack method for reinforced concrete structures

Numerical analysis of reinforced concrete structures with particular focus on bond behaviour

Bond behavior of the reinforcement bar in GFRP connector

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