EFFECT OF SLENDERNESS RATIO ON LOAD BEARING AND ENERGY DISSIPATION CHARACTERISTICS OF SHEAR PANELS

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KAMRANINEJAD AYUB; HOSSEINZADEH SEYED ALI ASGHAR

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Journal: Modares Civil Engineering journal Year:2017 | Volume:17 | Issue:2 Page(s): 93-104

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Title

EFFECT OF SLENDERNESS RATIO ON LOAD BEARING AND ENERGY DISSIPATION CHARACTERISTICS OF SHEAR PANELS

Author(s)

KAMRANINEJAD AYUB | HOSSEINZADEH SEYED ALI ASGHAR | Issue Writer Certificate

Keywords

SHEAR PANELQ1

PLATESQ2

CYCLIC BEHAVIORQ2

FINITE ELEMENT METHODQ2

NONLINEAR ANALYSISQ2

Abstract

Thin-walled panels are widely used in different engineering applications. Bridge and building plate girders, box columns and girders, frame bracing systems, liquid and gas containment structures, shelters, offshore structures, ship structures, slabs, hot-rolled W-shape steel profiles, steel plate shear wall systems and many other naval and aeronautical structures are examples of engineering elements that use plate of various thicknesses, according to their applications. The knowledge of the actual behavior of PLATES in such structures can be, of course, helpful in understanding the overall behavior of the structures. In general, PLATES in thin-walled structures may be under various types of loading, such as shear loading. Yielding of material and geometrical buckling of PLATES are two independent phenomena which may well interact with each other in SHEAR PANELs. Depending on the material properties, slenderness, aspect ratios, and boundary conditions of perfectly flat PLATES, the yielding may occur before, after or at the same time as buckling. Buckling in slender PLATES is a local and sudden phenomenon followed by large out-of-plane displacements and loss of stiffness. Slender PLATES are capable of carrying considerable post-buckling additional loads due to stresses in the inclined tension fields. On the other hand, a plate with low slenderness ratio yields before buckling and thus, no post-buckling capacity is expected. In between, PLATES with moderate slenderness ratios, experience both material yielding and geometrical nonlinearity almost at the same time. In the present paper, behavioral characteristics of SHEAR PANELs with simple or clamed boundary conditions are studied. Three different materials (carbon steel, stainless steel and aluminum) and various plate slenderness ratios are considered for adopting the FINITE ELEMENT METHOD. Results of nonlinear static analyses of different SHEAR PANELs show that slender PLATES, depending on the slenderness ratio, carry a relatively small shear load in the elastic stage until the occurrence of shear buckling. However, additional capacity in the post-buckling stage of these PLATES, prior to yielding, is significantly large. The PLATES reach their ultimate shear capacity slightly after yielding and their post-yield capacity is not significant. Note that the ultimate shear strength of slender PLATES is considerably lower than their nominal shear yield strength. In PLATES with intermediate slenderness ratio, yielding of material and buckling occur concurrently (simultaneously). They carry a relatively large shear load in the elastic stage before yielding/buckling. They have also some post-buckling/post-yield reserves before failure. The ultimate shear strength of moderate PLATES is somehow lower than their nominal shear yield strength (yield strength in shear). In stocky PLATES, yielding precedes buckling, thus the shear capacity in the elastic stage before yielding is significant. The PLATES have some post-yield capacity and the ultimate load is coincident with the occurrence of plastic buckling (if happens). The ultimate shear strength of stocky PLATES is almost equal to their nominal shear yield strength. Moreover, results of quasi-static cyclic analyses of different SHEAR PANELs show that the energy absorption capability, as expected, is very sensitive to the slenderness ratio of panels. By decrease in the slenderness ratio (increase of thickness), amount of the absorbed energy is substantially increased. For a specific slenderness ratio, steel SHEAR PANELs exhibit higher energy absorption than panels with aluminum materials. However, aluminum material of this study has higher yield strength than that of carbon steel and stainless steel materials. This, of course, highlights the important role of the modulus of elasticity in the energy dissipation capability of SHEAR PANELs. Yield strength of the material and panel boundary conditions have no important role in the amount of dissipated energy, compared to the material modulus of elasticity.

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APA: Copy

KAMRANINEJAD, AYUB, & HOSSEINZADEH, SEYED ALI ASGHAR. (2017). EFFECT OF SLENDERNESS RATIO ON LOAD BEARING AND ENERGY DISSIPATION CHARACTERISTICS OF SHEAR PANELS. MODARES CIVIL ENGINEERING JOURNAL, 17(2 ), 93-104. SID. https://sid.ir/paper/256810/en

Vancouver: Copy

KAMRANINEJAD AYUB, HOSSEINZADEH SEYED ALI ASGHAR. EFFECT OF SLENDERNESS RATIO ON LOAD BEARING AND ENERGY DISSIPATION CHARACTERISTICS OF SHEAR PANELS. MODARES CIVIL ENGINEERING JOURNAL[Internet]. 2017;17(2 ):93-104. Available from: https://sid.ir/paper/256810/en

IEEE: Copy

AYUB KAMRANINEJAD, and SEYED ALI ASGHAR HOSSEINZADEH, “EFFECT OF SLENDERNESS RATIO ON LOAD BEARING AND ENERGY DISSIPATION CHARACTERISTICS OF SHEAR PANELS,” MODARES CIVIL ENGINEERING JOURNAL, vol. 17, no. 2 , pp. 93–104, 2017, [Online]. Available: https://sid.ir/paper/256810/en

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