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International Journal of Engineering، جلد ۲۵، شماره ۱، صفحات ۱۷-۲۴
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عنوان انگلیسی Moving Load Analysis of Submerged Floating Tunnels
چکیده انگلیسی مقاله The concept of floating submerged tunnels becomes increasingly attractive idea to cross the straits. The structural solution in these bridges includes buoyancy force on tunnel body plus tension in mooring tethers. This paper investigates the effect of submergence on the dynamic response of submerged floating tunnels due to moving load. The inertial effect of the fluid on the submerged structure is accounted for by evaluating the added mass in deep and shallow waters. Then the effect of moving load velocity on the dynamic amplification factor for mid span displacement is evaluated. The results show that while the inertial effect of fluid reduces the critical velocity, closely spaced tethers provides a means to increase this velocity and could be used to control the moving load effect. Although increasing the tether stiffness increases the critical velocity, at the same time it results in the escalation of the impact factor. It is also found that for tunnels of long in length the contribution of higher modes in the response becomes more and more important and closeness to the seabed in shallow strait crossings can result in the amplification of the moving load effect.
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نویسندگان مقاله Jamil Mirzapour |
Structural Engineering, Politecnico Di Milano

Mahdieh Shahmardani |
Civil Eng., Urmia Univers

saeed tariverdilo |
Civil Eng., Urmia Univ.

Changiz Gheyretmand |
Civil Engineering, Urmia University

نشانی اینترنتی http://www.ije.ir/article_71954_8b735dd7192762b9b6b570fb86a5f39d.pdf
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زبان مقاله منتشر شده en
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