本文選題：橋涵工程　切入點：冰厚　出處：《巖石力學與工程學報》2014年S1期 　論文類型：期刊論文

【摘要】：在考慮了冰 水 橋墩流固耦合作用的基礎上,建立地震作用下不同冰厚時的冰 水 橋墩流固耦合動力方程,并以冰水域中矩形橋墩為研究對象,分析地震作用下冰厚對矩形橋墩動力響應及動水壓力的影響。結(jié)果表明:地震作用下,墩底最大彎矩和剪力以及橋墩側(cè)面動水壓力隨著冰厚的增加而增大,且當冰厚超過0.5 m時,墩底彎矩和剪力隨著冰厚的增加影響程度越來越大,墩底最大彎矩和剪力變化率分別相差88.71%和98.15%,但對橋墩側(cè)面動水壓力已基本無影響。墩身位移與加速度隨著冰厚的增大而增大,其中墩身加速度變化率最大達到45.08%。因此,在進行冰水域橋墩抗震設計時應著重考慮冰厚大于0.5 m時對結(jié)構(gòu)地震反應的影響。
[Abstract]:On the basis of considering the fluid-solid coupling action of the bridge piers, the dynamic equations of fluid-structure coupling of the bridge piers with different ice thickness under seismic action are established, and the rectangular piers in the ice water domain are taken as the object of study. The effect of ice thickness on the dynamic response and hydrodynamic pressure of rectangular bridge pier under earthquake is analyzed. The results show that the maximum bending moment and shear force at the bottom of the pier and the dynamic water pressure on the side of the pier increase with the increase of ice thickness. When the ice thickness is more than 0.5 m, the bending moment and shear force at the bottom of the pier become more and more important with the increase of ice thickness. The maximum bending moment and shear rate of pier bottom are 88.71% and 98.15, respectively, but they have no effect on the lateral dynamic pressure of pier. The displacement and acceleration of pier increase with the increase of ice thickness, and the maximum change rate of pier acceleration is 45.08. In seismic design of bridge piers in icy waters, the influence of ice thickness greater than 0.5 m on seismic response of structures should be taken into account.
【作者單位】： 北京科技大學土木與環(huán)境工程學院;
【基金】：國家自然科學基金資助項目(51078033,51178045) 教育部海外名師項目(MS2011BJKJ005)
【分類號】：U443.22;U442.55

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