Dynamic behaviour of bridge decks curved in plan

• Autorzy: Sasmal S. , Ramanjaneyulu K.
• Języki publikacji: EN

Abstrakty

EN

In this paper, a detailed study has initially been carried out, using SAP2000, to evaluate the adequacy of a griIIage model in refleeting the vibration characteristics of a curved bridge in comparison with the finite element model since the griIIage model is widely used by professional engineers due to its simplicity in modeIIing and interpretation. From this study, it has been noted that the grillage model is not capable of retleeting the dynamic characteristics accurately. In view of this, a finite element formulation and a computer program have been developed using eight noded isoparametric curved quadratic shell finite elements to assess the influence of different parameters, viz., curvature, aspect ratio, on the dynamic response of bridges curved in plan. However, the question of whether or not the deck slab curved in plan should be assumed to be rigid in its pIane during vibration, is yet to be answered. Therefore, the effect of curvature on in-plan deck tlexibility during in-pIane vibration of bridge decks curved in plan is also studied. The parametric study carried out in this investigation to establish the relationship between the structural behaviour of curved bridge deck with that of straight bridge would prove to be very useful for bridge engineers to readily assess the behaviour of bridge decks curved in plan, based on the responses for a straight bridge deck.

Słowa kluczowe

EN

curved bridge; free vibration analysis; deck flexibility; in-pIane vibration; modal displacement; optimisation

PL

mosty; drgania; wibracje

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2007
• Tom: Vol. 12, no 4
• Strony: 1117--1134
• Opis fizyczny: Bibliogr. 14 poz., wykr.

Twórcy

autor

Sasmal S.

autor

Ramanjaneyulu K.

• Scientist, Structural Engineering Research Centre TITI Post Office, Chennai 600113, INDIA,

Bibliografia

• AASHTO (1998): LRFD bridge design specification. - 2nd ed., American Association of State Highway and Transportation Officials, Washington.
• Au F.T.K. and Cheung Y.K. (1996): Static and free vibration analysis of variable-depth bridges of arbitrary alignments using the isoparametric spline finite strip method. - Thin-Walled Structures, vol.24, pp.19-51.
• Hamed E. and Frostig Y. (2005): Free vibrations of multi-girder and multi-cell box bridges with transverse deformations effects. - Journal of Sound and Vibration, vol.279, No.3-5, pp.699-722.
• Jiang J. and Olson M.D. (1991): Non-linear dynamic analysis of blast loaded cylindrical shell structures. - Computers and Structures, vol.41, No.1, pp.41-52.
• Krishnan A. and Suresh Y.J. (1998): A simple cubic linear element for static and free vibration analyses of curved beams. - Computers and Structures., vol.68, No.5, pp.473-489.
• Maleki S (2002): Effect of deck and support stiffness on seismic response of slab-girder bridge. - Engineering Structures, vol.24, No.2, pp.219-226.
• Memory T.J., Thambiratnam D.P. and Brameld G.H. (1995): Free vibration analysis of bridges. - Engineering Structures, vol.17, No.10, pp.705-713.
• Pany C., Parthan S. and Mukhopadhyay M. (2001): Free vibration analysis of an orthogonally supported multi-span curved panel. - Journal of Sound and Vibration, vol.241, No.2, pp.315-318.
• Sasmal S. and Chakravorty D. (2001): Static and free vibration characteristics of a bridge curved in plan- A finite Element Approac. - Proc. of International Conference on Theoretical, Applied, Computational and Experimental Mechanics (ICTACEM), Indian Institute of Technology, Kharagpur.
• Sasmal S., Ramanjaneyulu K., Gopalakrishnan S. and Lakshmanan N. (2005): Investigations on Free Vibration Characteristics of Bridges Curved in Plan. - Journal of The Institution of Engineers (India), vol..86, pp.72-78.
• Sasmal S. and Ramanjaneyulu K. (2007): Simplified Structural Response of Continuous Span Bridges Curved in Plan. - Pollack Periodica, International Journal for Engineering and Information Sciences (in Press).
• Taysi N. and Ozakca M. (2002): Free vibration analysis and shape optimization of box-girder bridges in straight and curved planform. - Engineering Structures, vol.24, No.5, pp.625-637.
• Yoon K.Y., Kang Y.J., Choi Y.J. and Park N.H. (2005): Free vibration analysis of horizontally curved steel I-girder bridges. - Thin-Walled Structures, vol.43, No.4, pp.679-699.
• Zienkiewicz O.C. and Taylor R.L. (2001): The Finite Element Method. - Solid Mechanics, vol.2, (Butterworth-Heinemann 2001).