【摘要】：橋梁基礎(chǔ)的安全性設(shè)計(jì)對(duì)橋梁工程的重要性不言而喻。在目前的橋梁設(shè)計(jì)中,模擬橋梁基礎(chǔ)的樁-土相互作用方面的問(wèn)題,一直是工作中的難點(diǎn)。這也體現(xiàn)了對(duì)相關(guān)課題研究的必要性。因此,本文選取贛州市章江南大道延伸道路工程中一實(shí)例連續(xù)梁橋的樁基礎(chǔ)作為研究原型,通過(guò)有限元分析軟件midas/Civil,重點(diǎn)考慮橋梁基礎(chǔ)局部結(jié)構(gòu)響應(yīng),對(duì)我國(guó)目前廣泛使用的樁基礎(chǔ)簡(jiǎn)化模擬方法“n倍樁徑嵌固法”作評(píng)估。本著探討nd嵌固法精確性和適用性的目的,力求能夠給工程師在橋梁工程設(shè)計(jì)工作中提供一定的參考。另外,考慮到場(chǎng)地條件對(duì)建筑物的抗震安全性有較大影響,本文提出將規(guī)范中場(chǎng)地的劃分,作為一項(xiàng)影響因素,加入到樁基礎(chǔ)簡(jiǎn)化模擬方法評(píng)估當(dāng)中。主要完成以下幾項(xiàng)工作:(1)大量查閱相關(guān)資料后,本文簡(jiǎn)明地對(duì)橋梁樁基礎(chǔ)簡(jiǎn)化模擬的研究發(fā)展現(xiàn)狀做了綜合概述;選擇目前我國(guó)工程中廣泛運(yùn)用的兩種簡(jiǎn)化模擬方法:n倍樁徑嵌固法(nd嵌固法)、“m法”作為研究對(duì)象。(2)對(duì)場(chǎng)地劃分的各項(xiàng)影響因素及評(píng)定指標(biāo)作了簡(jiǎn)要概述。并結(jié)合規(guī)范中場(chǎng)地劃分的條件,從大量的鉆孔資料中,選取了多組不同場(chǎng)地劃分的場(chǎng)地剖面作為本文分析工況的場(chǎng)地條件。(3)闡述在midas/Civil中如何實(shí)現(xiàn)兩種簡(jiǎn)化模擬方法;同時(shí)通過(guò)對(duì)實(shí)例橋梁樁基礎(chǔ)的計(jì)算分析,與實(shí)例橋梁工程計(jì)算書(shū)中設(shè)計(jì)值做比對(duì),驗(yàn)證建模方法的可行性。(4)使用驗(yàn)證后的建模方法,對(duì)nd嵌固法和m法分別建模:(1)將模型分別在共十?dāng)?shù)種靜力工況下進(jìn)行計(jì)算。選擇單樁位移響應(yīng)作為評(píng)估指標(biāo),以m法結(jié)果為基準(zhǔn),對(duì)不同場(chǎng)地條件下,nd嵌固法中的樁徑倍數(shù)“n”的適宜取值進(jìn)行探討。(2)建立樁基礎(chǔ)局部模型,在18個(gè)動(dòng)力工況下進(jìn)行動(dòng)態(tài)時(shí)程分析,加入考慮墩臺(tái)部位的內(nèi)力及位移響應(yīng)作為參考指標(biāo)。同樣以m法結(jié)果為基準(zhǔn),探討對(duì)不同場(chǎng)地條件下,nd嵌固法中的樁徑倍數(shù)的適宜取值。研究橋梁基礎(chǔ)簡(jiǎn)化模擬方法在抗震方面適用性。
[Abstract]:The importance of safety design of bridge foundation to bridge engineering is self-evident. In the current bridge design, it is always difficult to simulate the pile-soil interaction of bridge foundation. This also reflects the necessity of research on related topics. Therefore, this paper selects the pile foundation of a continuous beam bridge as the research prototype in the extending road project of Zhangjiangnan Avenue in Ganzhou City. The local structural response of the bridge foundation is mainly considered by the finite element analysis software midas/Civil,. This paper evaluates the simplified simulation method of pile foundation which is widely used in our country. In order to discuss the accuracy and applicability of nd inlay method, this paper tries to provide a certain reference for engineers in bridge engineering design. In addition, considering that site conditions have a great impact on the seismic safety of buildings, this paper proposes to add the division of site in the code as an influential factor to the evaluation of simplified simulation method for pile foundation. The main works are as follows: (1) after consulting a large number of relevant data, this paper makes a comprehensive overview of the research and development of simplified simulation of bridge pile foundation; This paper selects two simplified simulation methods widely used in our country at present: nd method and m method. (2) the influencing factors and evaluation indexes of site division are briefly summarized. Combined with the condition of site division in the code, from a large number of borehole data, the site profiles of different sites are selected as the site conditions in this paper. (3) how to realize two simplified simulation methods in midas/Civil; At the same time, through the calculation and analysis of the bridge pile foundation, the feasibility of the modeling method is verified by comparing it with the design value in the calculation book of the example bridge engineering. (4) using the verified modeling method, The modeling of nd method and m method are as follows: (1) the model is calculated under ten kinds of static conditions. The displacement response of single pile is selected as the evaluation index. Based on the results of m method, the appropriate value of pile diameter multiple "n" in nd method is discussed under different site conditions. (2) the local model of pile foundation is established. The dynamic time history analysis is carried out under 18 dynamic conditions, and the internal force and displacement response of the pier and abutment are considered as the reference index. On the basis of the results of m method, the appropriate value of pile diameter multiple in nd method is discussed under different site conditions. The applicability of simplified simulation method for bridge foundation in earthquake resistance is studied.
【學(xué)位授予單位】：廣州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：U443.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 張永亮;王培山;陳興沖;;橋梁群樁基礎(chǔ)抗震簡(jiǎn)化計(jì)算模型的適用性研究[J];鐵道學(xué)報(bào);2015年02期

2 劉志強(qiáng);;淺析橋梁抗震設(shè)計(jì)的重要性[J];城市建筑;2014年02期

3 殷鵬程;葉愛(ài)君;;作為能力保護(hù)構(gòu)件的橋梁群樁基礎(chǔ)設(shè)計(jì)地震力簡(jiǎn)化計(jì)算方法[J];城市道橋與防洪;2011年12期

4 王青橋;韋曉;王君杰;;橋梁樁基震害特點(diǎn)及其破壞機(jī)理[J];震災(zāi)防御技術(shù);2009年02期

5 龔緯;戚冬艷;;樁基礎(chǔ)簡(jiǎn)化模型在橋梁抗震中的應(yīng)用[J];鐵道工程學(xué)報(bào);2008年10期

6 白峻昶;靳金平;;時(shí)程分析用地震波選取的探討[J];山西建筑;2007年03期

7 喻志剛;劉德軍;;連續(xù)梁橋自振頻率等效剛度法與m法計(jì)算對(duì)比[J];四川建筑;2006年05期

8 孔德森,欒茂田,楊慶;樁土相互作用分析中的動(dòng)力Winkler模型研究評(píng)述[J];世界地震工程;2005年01期

9 肖曉春,遲世春,林皋;水平地震下土-樁-結(jié)構(gòu)相互作用簡(jiǎn)化分析方法[J];哈爾濱工業(yè)大學(xué)學(xué)報(bào);2003年05期

10 孫利民,張晨南,潘龍,范立礎(chǔ);橋梁樁土相互作用的集中質(zhì)量模型及參數(shù)確定[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2002年04期

，

本文編號(hào)：2313742