本文關(guān)鍵詞： 曲線梁橋 鉸接構(gòu)造 框架式 地震反應(yīng) Pushover分析 非線性時(shí)程分析 轉(zhuǎn)動(dòng)慣量　出處：《東北林業(yè)大學(xué)》2014年博士論文　論文類型：學(xué)位論文

【摘要】：橋梁是公路的重要組成部分,一旦遭受地震破壞,不僅經(jīng)濟(jì)損失巨大,后期修復(fù)困難,更會(huì)造成交通癱瘓,救災(zāi)物資運(yùn)輸緩慢,導(dǎo)致災(zāi)區(qū)的傷員無法得到及時(shí)救治,間接損失無法估量。隨著人類科技的飛速發(fā)展,大跨徑、高橋墩、復(fù)雜結(jié)構(gòu)形式的橋梁不斷被建設(shè)應(yīng)用,在地震作用下這些復(fù)雜形式橋梁的動(dòng)力反應(yīng)及非線性行為已經(jīng)成為學(xué)術(shù)界和工程界探討的重點(diǎn)。 鉸接構(gòu)造框架式曲線梁橋在美國(guó)的高速公路建設(shè)中被廣泛使用,由于這一橋型往往具有高橋墩、大跨徑,并包含框架結(jié)構(gòu)、鉸接構(gòu)造的結(jié)構(gòu)特點(diǎn),其動(dòng)力性能十分復(fù)雜,在近幾次的大地震中,其遭受的破壞十分嚴(yán)重。因此,對(duì)這一橋型的地震反應(yīng)進(jìn)行深入研究并明確非線性損傷過程具有重要的學(xué)術(shù)價(jià)值和巨大的工程需求背景。本文結(jié)合加利福尼亞州的Yuba曲線橋及橋址附近的三維Northridge地震波針對(duì)鉸接構(gòu)造框架式曲線梁橋進(jìn)行動(dòng)力分析,深入研究這一橋型的地震反應(yīng)和非線性損傷過程。主要的研究?jī)?nèi)容及創(chuàng)新成果如下： 1、系統(tǒng)地歸納了鉸接構(gòu)造框架式曲線梁橋的非線性動(dòng)力模型的建立方法和過程。介紹了混凝土、鋼筋的材料本構(gòu)模型；總結(jié)了橋臺(tái)土壤彈簧、橋臺(tái)剪力鍵、橋梁內(nèi)部彈性支撐墊的非線性模型的模擬理論和方法；對(duì)比了橋梁碰撞的非線性模型,并使用考慮了滯回阻尼的赫茲模型模擬橋梁的碰撞單元；創(chuàng)新性地提出了鉸接構(gòu)造的細(xì)部模擬方法。 2、研究鉸接跨的非線性損傷過程及鉸接點(diǎn)兩側(cè)縱向間距對(duì)鉸接跨損傷過程的影響。采用細(xì)分模型和簡(jiǎn)化模型分別對(duì)鉸接梁跨進(jìn)行局部模擬,通過對(duì)比模型數(shù)據(jù)研究?jī)煞N模型的準(zhǔn)確程度和適用范圍；通過Pushover分析研究鉸接構(gòu)造內(nèi)部的彈性橡膠支座、縱向限位鋼束、橫向受壓彈性支撐墊、橫縱向碰撞單元及鉸接跨根部梁段的非線性過程及損傷次序；在細(xì)分模型中改變鉸接點(diǎn)兩側(cè)梁段的縱向間距,通過Pushover分析獲得縱向間距及縱向碰撞對(duì)鉸接構(gòu)造內(nèi)各限位裝置及梁跨根部梁段的非線性過程的影響。 3、研究轉(zhuǎn)動(dòng)慣量對(duì)曲線橋動(dòng)力特性的影響,確定曲線橋建模的最優(yōu)質(zhì)量布置形式�？偨Y(jié)曲線橋建模的四種常用質(zhì)量布置形式;對(duì)四種質(zhì)量布置下Yuba曲線橋模型進(jìn)行特征值分析,對(duì)比模型的自振周期、基本振型和高階振型,研究轉(zhuǎn)動(dòng)慣量的輸入對(duì)曲線橋自振狀態(tài)的影響；選用2.0倍的Northridge地震波對(duì)四種質(zhì)量布置下的Yuba曲線橋模型進(jìn)行非線性時(shí)程分析,通過分析結(jié)果研究轉(zhuǎn)動(dòng)慣量的輸入對(duì)曲線梁橋的主梁位移、橋墩彎矩曲率及橋墩扭矩的影響；并最終確定曲線橋動(dòng)力模型的最優(yōu)質(zhì)量布置形式。 4、鉸接構(gòu)造框架式曲線梁橋的三維地震反應(yīng)的研究。通過對(duì)比三維地震荷載和二維地震荷載作用下Yuba曲線橋的主梁位移和橋墩彎矩曲率獲得豎向地震波對(duì)橋梁地震反應(yīng)的影響；在三維地震荷載下,對(duì)Yuba曲線橋進(jìn)行非線性時(shí)程分析,獲得主梁、橋墩、橋臺(tái)、鉸接構(gòu)造及各限位裝置和碰撞單元的地震反應(yīng),確定框架式曲線梁橋的易損傷位置；通過改變橋墩墩高設(shè)置,獲得橋墩對(duì)稱設(shè)置及墩高減小設(shè)置對(duì)橋梁地震反應(yīng)的影響。
[Abstract]:The bridge is an important part of the highway , and once it is damaged by the earthquake , not only the economic loss is huge , the later repair is difficult , it can cause traffic paralysis , the transportation of the disaster relief material is slow , the wounded in the disaster area can not be treated in time , and the indirect loss can not be measured . With the rapid development of human science and technology , the dynamic response and nonlinear behavior of these complex forms of bridges have become the focus of discussion in academic circles and engineering circles . This paper studies the seismic response of the bridge type and the process of nonlinear damage . The main research contents and the innovative results are as follows : 1 . The method and the process of establishing the nonlinear dynamic model of the articulated structure frame type curved beam bridge are systematically summarized . The constitutive model of concrete and steel bar is introduced . The nonlinear model of bridge soil spring , bridge deck shear key and bridge inner elastic support cushion is summarized . The nonlinear model of bridge collision is compared , and the collision unit of bridge is simulated using the Hertz model considering the hysteretic damping . 2 . To study the influence of the nonlinear damage process of articulated span and the longitudinal spacing between two sides of articulation point on the process of articulation span damage . The nonlinear process and damage order of two models are studied by using subdivision model and simplified model . 3 . To study the influence of moment of inertia on the dynamic characteristics of curved bridge , and to determine the most high quality layout form of curve bridge modeling , and to analyze the characteristic value of Yuba curve bridge model under four quality arrangements , and to study the influence of the input of inertia of inertia on the self - vibration state of curve bridge . 4 . The study of the three - dimensional seismic response of the frame - type curved beam bridge with articulated structure . By comparing the three - dimensional seismic load and the two - dimensional seismic load , the influence of vertical seismic waves on the seismic response of the bridge is obtained . Under the three - dimensional seismic load , the nonlinear time history analysis of the Yuba curve bridge is carried out to obtain the seismic response of the main beam , the bridge pier , the abutment , the hinge structure and the limit device and the collision unit , and the easy damage position of the frame - type curved beam bridge is obtained .

【學(xué)位授予單位】：東北林業(yè)大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：U442.55

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 李鴻晶,孫廣俊;結(jié)構(gòu)平穩(wěn)隨機(jī)地震反應(yīng)時(shí)域分析:方法[J];地震工程與工程振動(dòng);2005年04期

2 張守斌;聶昊;;增量動(dòng)力分析方法及其在性能評(píng)估中的應(yīng)用[J];工程建設(shè)與設(shè)計(jì);2007年06期

3 李黎;吳t，

本文編號(hào)：1530332