پیوندهای مفید
آمار
| تعداد نشریات | 21 |
| تعداد شمارهها | 691 |
| تعداد مقالات | 10,035 |
| تعداد مشاهده مقاله | 71,039,516 |
| تعداد دریافت فایل اصل مقاله | 62,489,029 |
Numerical Formulation on Crack Closing Effect In Buckling Analysis of Edge-Cracked Columns | ||
| Journal of Rehabilitation in Civil Engineering | ||
| مقاله 8، دوره 2، شماره 2 - شماره پیاپی 4، آبان 2014، صفحه 75-83 اصل مقاله (472.45 K) | ||
| شناسه دیجیتال (DOI): 10.22075/jrce.2014.219 | ||
| نویسندگان | ||
| Omid Rezaifar1؛ Mohammad Reza Doostmohammadi* 2؛ Majid Gholhaki1 | ||
| 1Assistant Professor, Faculty of Civil Engineering & Modern executive technologies, Semnan University, Semnan, Iran | ||
| 2M.Sc., Faculty of Civil Engineering, Semnan University, Semnan, Iran | ||
| تاریخ دریافت: 30 مهر 1391، تاریخ بازنگری: 04 تیر 1393، تاریخ پذیرش: 30 مهر 1393 | ||
| چکیده | ||
| In this paper, buckling of simply supported column with an edge crack is investigated numerically and analytically. Four different scenarios of damage severities are applied to a column, open crack assumption and the effect of closing crack in stability of the column which depends on position and size of cracks, are numerically compared. Crack surfaces contact is modeled with GAP element using SAP2000. For analytical solution, transfer matrix method, combined with fundamental solutions of the intact columns is used to obtain the capacity of slender prismatic columns. The stiffness of the cracked section is modeled by a massless rotational spring and governing equations are obtained explicitly for simply supported column from second-order determinant. As expected results show that the effect of a closing crack in presence of compressive load may lead to an increment in buckling load depending on crack depth and position. For the first time, a dimensionless formulation based on numerical results is presented in this study. Proposed formula predicts increment effect of closing crack in buckling results of a notched column. | ||
| کلیدواژهها | ||
| Crack closing؛ Buckling؛ Transfer matrix؛ Contact surface؛ gap | ||
| مراجع | ||
|
[1] Aristizabal-Ochoa, J.D. (2004). “Large deflections stability of slender beam-columns with semi rigid connections: Elastica approach”. Journal of Engineering Mechanics, ASCE, Vol. 130, pp. 274-282,. [2] Ranjbaran A, Khosravi S, Ahmadian H, Moravej M.T. (2008). “Buckling analysis and damage detection of cracked column”. The 4th National Conference on Civil Engineering, University of Tehran, Iran. [3] Dimarogonas, AD. (1981). “Buckling of rings and tubes with longitudinal cracks”. Mechanics Research Communications, Vol. 8, pp. 179-189. [4] Liebowitz H., Vandeveldt H., Harris D.W. (1967). “Carrying capacity of notched columns”. International Journal of Solids and Structures, Vol. 3, pp.489-500. [5] Liebowitz H., Claus(Jr) W.D. (1968) “Failure of notched columns”. Engineering Fracture Mechanics, Vol. 1, pp. 379-383. [6] Gurel M.A., Kisa M. (2005). “Buckling of slender prismatic columns with a single edge crack under concentric vertical loads”. Turkish Journal of Engineering and Environment Sciences, Vol. 29, pp. 185-193. [7] Papadopolus C.A. (1994). “Torsional vibration of rotors with transverse surface cracks”. Computers & Structures, Vol. 51, pp.713-718. [8] Chondros, T.G., Dimarogonas, A.D. (1989) “Dynamic sensitivity of structures to cracks”. Journal of Vibration, Acoustics, Stress and Reliability in Design , Vol. 111, pp. 251-256. [9] Shifrin E.I., Ruotolo R., (1999). “Natural Frequencies of a beam with an arbitrary number of cracks”. Journal of Sound and Vibration, Vol. 222, pp. 409-423. [10] Timoshenko S.P., Gere J.M. (1961). “Theory of Elastic Stability”. McGraw-Hill, New York, pp. 214-217. [11] Wilson, E.L. (2002). “Three dimensional static and dynamic analysis of structures”. Computers and structures, Inc., 3rd edition, Berkeley, California, pp. 308-312. | ||
|
آمار تعداد مشاهده مقاله: 2,708 تعداد دریافت فایل اصل مقاله: 2,413 |
||