Minor Axis Moment-Thrust Response Behavior in Steel I-Shaped Members

Aktaş, Muharrem; Earls, Christopher J.

doi:10.1061/(asce)0733-9445(2006)132:7(1079)

Cited by 6 publications

(3 citation statements)

References 6 publications

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“…To exhibit thin shell behavior, both the strain method specified in Macneal [37] and reduced integration were used in the formulation of the element. This type of element was selected as it yielded reliable results in previous validation studies [38]. The sensitivity of the numerical model to the mesh density was also examined using different mesh densities.…”

Section: Mesh and Support Conditionsmentioning

confidence: 99%

Compactness Effect on Bending Behavior of Cold Formed Steel Beams

Yaman

Ağcakoca

2020

Period. Polytech. Civil Eng.

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With respect to the determination of the strength of the structural steel members, first the behavior of cross section and then that of the overall member should be considered. In this study, it is aimed to determine the compactness behavior of U-shaped steel sections that exposed to minor-axis bending. Thus, the study questions whether the U-shaped cross section exhibits sufficient dimensions for the collapse mechanism to occur by aiding the moment redistribution in the structural system by supplying sufficient hinge rotation capacity. In order to investigate compactness behavior, three different channel section steel profiles are selected. Four point experimental tests are carried out to validate finite element models of the selected profiles. Upon validated finite element models, parametric studies are performed with finite element analyses. In the parametric study two steel classes, different beam lengths and cross-sectional geometries are taken as parameters. At the end of the study the plate slenderness condition required for plastic design calculated based on Eurocode3 is evaluated with the results of parametric study.

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Section: Mesh and Support Conditionsmentioning

confidence: 99%

Compactness Effect on Bending Behavior of Cold Formed Steel Beams

Yaman

Ağcakoca

2020

Period. Polytech. Civil Eng.

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“…The regular truss element in ABAQUS was employed for modeling of reinforcing bars. Ideal plasticity model was employed to model the material property of the reinforcing steel [22].…”

Section: Preparation Of Numerical Modelmentioning

confidence: 99%

Determination of Plastic Hinge Length for RC Beams Designed with Different Failure Modes under Static Load

Sümer

2019

Acta Phys. Pol. A

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Inelastic deformation without substantial loss of strength can lead to the dissipation of seismic energy in reinforced concrete structures during the earthquakes. Inelastic deformations are concentrated in specific areas within the structure, so called plastic hinge zones, and they are designed to redistribute the plastic moments. Dynamic response of the entire structure relies on these specific areas. Therefore, modeling them as close to its real location value within the structural element plays an important role especially in numerical analysis. The behavior and location of plastic hinge of reinforced concrete elements has been studied by conducting experiments. More research still need to be done by considering different parameters due to the high complexity engaged in the behavior. This study involves parametric study to determine the plastic hinge length of reinforced concrete beams using experimentally verified nonlinear finite element approach. Different failure behavior of reinforced concrete beams is selected as the parameter in the numerical analysis. Different failure modes are achieved with three different steel reinforcement ratio and with three different shear span ratio defining failure by means of ductility and slenderness, respectively. Results proved that both slenderness and the ratio of tensile reinforcement has effect on the plastic hinge length. Existing conclusions in the literature determine the plastic hinge length shorter than that found from numerical modelling. Thus, existing expressions approach to the energy dissipation phenomenon more conservatively.

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“…In this study damage variable in compression is calculated by using the equations given in Figure 4a [19]. The parameter bc represents the relation between plastic and inelastic strains and can be determined using curve-fitting of cyclic tests [20]. Damage variable in tension is determined from bilinear behavior of concrete and values are plotted in Figure 4b.…”

Section: Nonlinear Behavior Of Materialsmentioning

confidence: 99%

Yüksek Dayanımlı Betonla Üretilmiş Kirişlerde Plastik Mafsal Boyunun Belirlenmesi

Sümer

2017

Academic Platform-Journal of Engineering and Science

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ÖzDepremler sırasında betonarme yapılar elastik olmayan deformasyonlar yaparak yapıya gelen enerjiyi sönümlerler. Yapılarda bulunan eğilme elemanlarında oluşan plastik deformasyonlar plastik mafsal bölgesi olarak adlandırılan küçük bir bölgede oluşur ve bu bölge elemanın yük taşıma ve deformasyon kapasitesi için kritik öneme sahiptir. Statik itme (Pushover) yöntemi mevcut yapıların değerlendirilmesinde kullanılan doğrusal olmayan bir analiz yöntemidir. Bu yöntemde elemanların plastik mafsal özelliklerinin doğru tanımlanması çok önemlidir. Yapı elemanlarında oluşan plastik mafsal, yapı elemanlarının boyut ve malzeme özellikleriyle yakından ilgilidir. Plastik mafsal uzunluğunun belirlenmesinde günümüze kadar birçok deneysel çalışmalar yapılmış fakat eleman boyutlarının büyüklüğü, deneysel imkânların yetersizliği ve yapı elemanlarının kompozit malzeme özellikleri sebebiyle sınırlı bilgi edinilebilmiştir. Bu çalışmada sonlu elemanlar modeli kurularak ABAQUS yazılımı yardımıyla plastik mafsal boyu belirlenmeye çalışılmıştır. Literatürden elde edilen deneysel çalışmalar sonlu elemanlar modeliyle yük-deplasman ve şekil değiştirme kapasiteleri ile doğrulanmıştır. Plastik mafsal boyunun belirlenmesi için kiriş boyutları kiriş davranışını değiştirecek şekilde kısa, orta ve narin olarak değiştirilmiş, kiriş malzemesi de yüksek dayanımlı betona uygun olarak C50, C60 ve C80 olarak belirlenmiştir. Kirişlerde oluşan yenilme çatlakları ve donatı akma uzunlukları analiz edilerek her bir kiriş için plastik mafsal boyu belirlenmiştir. AbstractDuring earthquake concrete structures dissipate energy by deforming inelastically. The plastic deformation localized in a small zone namely the plastic hinge zone is critical for flexural members as it governs the load carrying and deformation capacities of the member. Pushover analysis, one method of nonlinear static analysis, is generally used in the assessment of existing buildings. In pushover analysis nonlinear hinge properties of each member should be addressed. The formation of a plastic hinge in structural member depends on the structural member properties such as dimension. Due to the high non-linearity occurs in plastic hinge zone and restrictions by the time and cost especially in large tests, very limited knowledge has been obtained from the laboratory tests up to date. Moreover, past studies showed that none of the existing empirical models is adequate for prediction of plastic hinge length. This study tries to investigate the problem numerically using Nonlinear Finite Element Modeling (FEM) approach by employing software package ABAQUS. To achieve this, a numerical model is generated and verified with existing experimental studies obtained from the literature. Parametric studies are performed to investigate the plastic hinge length in terms of material properties concrete and dimensions of the member. High strength concrete is selected to be as C50, C60 and C80 and dimension of the beams are determined as deep, intermediate and slender. With the calibrated FEM model, the extent o...

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Minor Axis Moment-Thrust Response Behavior in Steel I-Shaped Members

Cited by 6 publications

References 6 publications

Compactness Effect on Bending Behavior of Cold Formed Steel Beams

Compactness Effect on Bending Behavior of Cold Formed Steel Beams

Determination of Plastic Hinge Length for RC Beams Designed with Different Failure Modes under Static Load

Yüksek Dayanımlı Betonla Üretilmiş Kirişlerde Plastik Mafsal Boyunun Belirlenmesi

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