發(fā)布時(shí)間：2018-06-27 02:32

  本文選題：高墩 + 樁基礎(chǔ)��； 參考：《中南大學(xué)學(xué)報(bào)(自然科學(xué)版)》2015年07期

【摘要】：為了探討樁基礎(chǔ)高墩自復(fù)位隔震機(jī)理,用2個(gè)彈簧模擬橋墩的提離搖擺,考慮限位鋼筋的影響,基于某鐵路高墩橋梁,采用非線性時(shí)程分析方法,輸入3條強(qiáng)震記錄,討論高墩搖擺反應(yīng)隨提離彈簧剛度、基礎(chǔ)寬度及參數(shù)λ變化的規(guī)律。研究結(jié)果表明:提離彈簧剛度越小橋墩的搖擺振動越劇烈、搖擺反應(yīng)越大,墩頂位移隨λ的增大而減小、有明顯的線性關(guān)系,墩底彎矩隨λ的變化相對復(fù)雜。通過基礎(chǔ)寬度、λ及墩-承臺的接觸剛度調(diào)整均可以實(shí)現(xiàn)對橋墩搖擺反應(yīng)的控制。
[Abstract]:In order to study the mechanism of self-reset isolation of high pier of pile foundation, two springs are used to simulate the lift and swing of pier, and the influence of limited steel bar is considered. Based on the nonlinear time-history analysis method, three strong earthquake records are inputted to a railway bridge with high pier. The variation of rocking response of high pier with stiffness of lift spring, width of foundation and parameter 位 is discussed. The results show that the greater the stiffness of lifting spring, the more violent the rocking vibration of pier is, and the greater the rocking response is, and the displacement of pier top decreases with the increase of 位, which has obvious linear relationship, and the variation of bending moment of pier bottom with 位 is relatively complex. Through the adjustment of foundation width, 位 and the contact stiffness of pier-cap, the rocking response of bridge pier can be controlled.
【作者單位】： 蘭州交通大學(xué)土木工程學(xué)院;同濟(jì)大學(xué)土木工程學(xué)院;
【基金】：國家自然科學(xué)基金資助項(xiàng)目(51368033) 長江學(xué)者和創(chuàng)新團(tuán)隊(duì)發(fā)展計(jì)劃項(xiàng)目(IRT1139) 國家重點(diǎn)基礎(chǔ)研究發(fā)展規(guī)劃(973計(jì)劃)項(xiàng)目(2013CB036302)~~
【分類號】：U442.55

【參考文獻(xiàn)】

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