ANALYSIS OF FRAMES RESTING ON ELASTIC FOUNDATIONS AND SUBJECTED TO UNSYMMYTRICAL LOADS | ||||
| The International Conference on Civil and Architecture Engineering | ||||
| Article 18, Volume 6, 6th International Conference on Civil and Architecture Engineering, May 2006, Page 123-141 PDF (377.53 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/iccae.2006.45760 | ||||
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| Authors | ||||
| Adel H. Salem1; M. Saad Raslan2; Mostafa M. Abdel-Wahab3; Osama El-Desouky3 | ||||
| 1Former Dean of Faculty of Engineering – Ain Shams University, Cairo, Egypt. | ||||
| 2Assistant Dean of Faculty of Engineering and Technology – Arab Academy for Science and Technology, Alexandria, Egypt. | ||||
| 3Egyptian Armed Forces. | ||||
| Abstract | ||||
| This investigation includes the determination of the elastic critical summation of loading of different varieties of portal and box frames resting on elastic foundations and subjected to unsymmetrical loading. The critical buckling loads of these frames are obtained for practical values of the stiffness of the elastic springs. In addition, the effect of the stiffness of the elastic foundations on the elastic stability of these frames is thoroughly examined by changing the stiffness of the elastic springs. Different families of curves are obtained to represent the relationship between the critical buckling loads and the parameters affecting it. For unsymmetrical loading P1 & P2, The elastic critical sum of loading is found to be nearly constant and is irrespective of the load ratio p1/p2 even for the most severe case when P = zero 1 and the whole load 2 P acts on the other column. In general, there was a complete analogy between frames subjected to unsymmetrical loads and resting on elastic springs and those resting on rigid supports for both portal and box frames. | ||||
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