EFFECT OF INITIAL OUT-OF-STRAIGHTNESS IMPERFECTION ON SECOND- ORDER ELASTIC BEHAVIOR OF PLANAR FRAMES

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REZAEI PAZHAND M.; MOHTASHAMI E.

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Journal: STRUCTURE AND STEEL Year:2008 | Volume:4 | Issue:4 Page(s): 3-16

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Title

EFFECT OF INITIAL OUT-OF-STRAIGHTNESS IMPERFECTION ON SECOND- ORDER ELASTIC BEHAVIOR OF PLANAR FRAMES

Author(s)

REZAEI PAZHAND M. | MOHTASHAMI E. | Issue Writer Certificate

Keywords

PLANAR FRAMEQ3

NONLINEAR ANALYSISQ2

INITIAL OUT-OF-STRAIGHTNESS IMPERFECTIONQ3

SECOND-ORDER EFFECTSQ3

TRANS-VERSE MEMBER LOADSQ3

Abstract

Geometrical imperfections usually occur during fabrication and erection. Initial out-of-straightness is one of the most common types of these flaws. In this paper, the elastic tangent stiffuess matrix of an initially curved beam column element subjected to nodal forces and transverse member loads is derived. Second-order analysis of PLANAR FRAMEs is carried out afterwards. The proposed method introduces a new function for explicit modeling of out-of-straightness imperfection and incorporates it directly into the element's stiffness matrix. In addition, the proposed technique uses only one element for each member and presents a single formulation for both tensile and compressive members. The obtained load-deflection curve is compared with those predicted by other methods and the effect of INITIAL OUT-OF-STRAIGHTNESS IMPERFECTION is also discussed. Results of numerical examples indicate that INITIAL OUT-OF-STRAIGHTNESS IMPERFECTION is less important if the stability of frame is controlled by second-order P-D effect. On the other hand, it can have a considerable effect on the behavior of structure when second-order P-d effect is dominant.

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APA: Copy

REZAEI PAZHAND, M., & MOHTASHAMI, E.. (2008). EFFECT OF INITIAL OUT-OF-STRAIGHTNESS IMPERFECTION ON SECOND- ORDER ELASTIC BEHAVIOR OF PLANAR FRAMES. STRUCTURE AND STEEL, 4(4), 3-16. SID. https://sid.ir/paper/136608/en

Vancouver: Copy

REZAEI PAZHAND M., MOHTASHAMI E.. EFFECT OF INITIAL OUT-OF-STRAIGHTNESS IMPERFECTION ON SECOND- ORDER ELASTIC BEHAVIOR OF PLANAR FRAMES. STRUCTURE AND STEEL[Internet]. 2008;4(4):3-16. Available from: https://sid.ir/paper/136608/en

IEEE: Copy

M. REZAEI PAZHAND, and E. MOHTASHAMI, “EFFECT OF INITIAL OUT-OF-STRAIGHTNESS IMPERFECTION ON SECOND- ORDER ELASTIC BEHAVIOR OF PLANAR FRAMES,” STRUCTURE AND STEEL, vol. 4, no. 4, pp. 3–16, 2008, [Online]. Available: https://sid.ir/paper/136608/en

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