MOVING LOAD ANALYSIS OF SUBMERGED FLOATING TUNNELS

سال انتشار: 1390
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 951

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شناسه ملی سند علمی:

JR_IJE-25-1_003

تاریخ نمایه سازی: 17 خرداد 1393

چکیده 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 inmooring 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. Theresults 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.

نویسندگان

m Shahmardani

Department of Civil Engineering, University of Urmia, Urmia, Iran

j Mirzapour

Department of Civil Engineering, University of Urmia, Urmia, Iran

ch Gheyratmand

Department of Civil Engineering, University of Urmia, Urmia, Iran

s Tariverdilo

Department of Civil Engineering, University of Urmia, Urmia, Iran