發(fā)布時(shí)間：2018-01-30 14:35

  本文關(guān)鍵詞： 大跨徑連續(xù)剛構(gòu)橋 長(zhǎng)期撓度 健康監(jiān)測(cè) 恒載零彎矩　出處：《廣州大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：自進(jìn)入19世紀(jì)以來(lái)，隨著預(yù)應(yīng)力體系的發(fā)展，大跨徑預(yù)應(yīng)力連續(xù)剛構(gòu)橋以其施工簡(jiǎn)便、造價(jià)經(jīng)濟(jì)、受力合理、行車舒適等獨(dú)特的優(yōu)勢(shì)得到了快速發(fā)展。但是，國(guó)內(nèi)外大跨徑預(yù)應(yīng)力連續(xù)剛構(gòu)橋普遍存在一個(gè)問(wèn)題—跨中過(guò)度下?lián)?且普遍沒(méi)有建立相應(yīng)的健康監(jiān)測(cè)系統(tǒng)實(shí)時(shí)對(duì)橋梁的運(yùn)營(yíng)狀態(tài)進(jìn)行監(jiān)測(cè)評(píng)估，導(dǎo)致一些此類橋型出現(xiàn)嚴(yán)重病害甚至突然垮塌，，造成了嚴(yán)重的經(jīng)濟(jì)損失甚至危機(jī)人們的生命財(cái)產(chǎn)安全，因此對(duì)大橋運(yùn)營(yíng)狀態(tài)實(shí)時(shí)監(jiān)測(cè)與長(zhǎng)期撓度控制的研究有重大意義。 本文首先以某大橋?yàn)楣こ瘫尘�，運(yùn)用橋梁設(shè)計(jì)分析軟件midas civil模擬計(jì)算其長(zhǎng)期撓度，分析對(duì)比預(yù)應(yīng)力損失、混凝土收縮徐變計(jì)算模式等因素對(duì)大跨徑預(yù)應(yīng)力連續(xù)剛構(gòu)橋跨中長(zhǎng)期撓度的影響，分析影響大跨度預(yù)應(yīng)力連續(xù)剛構(gòu)橋跨中長(zhǎng)期撓度各種因素的敏感性。 其次，本文系統(tǒng)介紹了某大橋的健康監(jiān)測(cè)系統(tǒng)，包括其工作方式、硬件配置、監(jiān)測(cè)系統(tǒng)的安裝等，并通過(guò)對(duì)該大橋從成橋至今3年的跨中撓度實(shí)時(shí)監(jiān)測(cè)數(shù)據(jù)的收集，把監(jiān)測(cè)長(zhǎng)期撓度與理論計(jì)算值做了比較，分析預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)橋長(zhǎng)期撓度的變化規(guī)律，列舉了該大橋在行車荷載下跨中撓度的跳動(dòng)規(guī)律，為大橋的安全性評(píng)價(jià)提供基本依據(jù)，最終為此類橋型的施工、設(shè)計(jì)、養(yǎng)護(hù)等提供依據(jù)。 最后，為主動(dòng)控制大跨度預(yù)應(yīng)力連續(xù)剛構(gòu)橋跨中長(zhǎng)期下?lián)喜『�，本文基于恒載零彎矩理論，采用頂板預(yù)應(yīng)力控制跨中長(zhǎng)期下?lián)戏绞�，使橋體自重產(chǎn)生的正彎矩與預(yù)應(yīng)力產(chǎn)生的負(fù)彎矩平衡，達(dá)到控制跨中長(zhǎng)期下?lián)系哪康�，并將重配預(yù)應(yīng)力束后的跨中位移與原設(shè)計(jì)作比較分析，驗(yàn)證恒載零彎矩法在控制大跨徑預(yù)應(yīng)力混凝土連續(xù)剛構(gòu)橋跨中長(zhǎng)期撓度的可行性。
[Abstract]:Since 19th century, with the development of prestressed system, long-span prestressed continuous rigid frame bridge has been developed rapidly with its unique advantages such as simple construction, economical cost, reasonable force, comfortable driving and so on. There is a common problem of long-span prestressed continuous rigid frame bridges at home and abroad-excessive deflection in the span, and there is no corresponding health monitoring system to monitor and evaluate the operation status of the bridge in real time. As a result, some of these bridges appear serious diseases or even suddenly collapse, resulting in serious economic losses or even a threat to the safety of people's lives and property. Therefore, it is of great significance to study the real-time monitoring and long-term deflection control of the bridge. In this paper, the bridge design and analysis software midas civil is used to simulate and calculate the long-term deflection of a bridge, and the loss of prestressing force is analyzed and compared. The influence of concrete shrinkage and creep calculation model on the long-span prestressed continuous rigid frame bridge span deflection is analyzed. The sensitivity of various factors affecting the long-span prestressed continuous rigid frame bridge span deflection is analyzed. Secondly, this paper systematically introduces the health monitoring system of a bridge, including its working mode, hardware configuration, monitoring system installation and so on. Through the collection of the real-time monitoring data of the mid-span deflection of the bridge from the completion of the bridge to three years, the long-term deflection of the bridge is compared with the theoretical calculation value, and the variation law of the long-term deflection of the prestressed concrete continuous rigid frame bridge is analyzed. This paper enumerates the runout rule of the midspan deflection of the bridge under the traffic load, which provides the basic basis for the safety evaluation of the bridge, and finally provides the basis for the construction, design and maintenance of this kind of bridge. Finally, in order to actively control the long-span prestressed continuous rigid frame bridge span mid- and long-term deflection disease, based on the theory of zero moment of dead load, the roof prestressed control method of mid-long term deflection is adopted in this paper. The balance of the positive moment caused by the weight of the bridge body and the negative moment produced by the prestressing force can achieve the purpose of controlling the mid-span deflection in the long term, and the mid-span displacement after the rearrangement of the prestressing beam is compared with the original design. The feasibility of zero-moment dead load method in controlling long-span prestressed concrete continuous rigid frame bridge span deflection is verified.
【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】：2014
【分類號(hào)】：U441;U448.23

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 陳宇峰;徐君蘭;余武軍;;大跨PC連續(xù)剛構(gòu)橋跨中持續(xù)下?lián)铣梢蚣邦A(yù)防措施[J];重慶交通大學(xué)學(xué)報(bào)(自然科學(xué)版);2007年04期

2 齊東春;張永水;李強(qiáng);;大跨徑連續(xù)剛構(gòu)橋跨中下?lián)系某梢蚣皩?duì)策[J];重慶交通大學(xué)學(xué)報(bào)(自然科學(xué)版);2007年06期

3 黃瓊;葉梅新;韓衍群;;鋼-混凝土疊合板組合橋面的徐變和應(yīng)力重分布研究[J];鐵道科學(xué)與工程學(xué)報(bào);2006年03期

4 劉海成,宋玉普,吳智敏;考慮溫度影響的大體積混凝土應(yīng)力場(chǎng)分析方法[J];大連理工大學(xué)學(xué)報(bào);2005年01期

5 謝峻;王國(guó)亮;鄭曉華;;大跨徑預(yù)應(yīng)力混凝土箱梁橋長(zhǎng)期下?lián)蠁?wèn)題的研究現(xiàn)狀[J];公路交通科技;2007年01期

6 陳開利;帕勞共和國(guó)的橋梁倒塌事故[J];國(guó)外公路;1998年03期

7 詹建輝,陳卉;特大跨度連續(xù)剛構(gòu)主梁下?lián)霞跋淞毫芽p成因分析[J];中外公路;2005年01期

8 顏東煌;林鳴;袁明;;混凝土箱梁腹板豎向預(yù)應(yīng)力筋的彈性壓縮損失分析[J];中外公路;2007年02期

9 陳惠玲;按預(yù)應(yīng)力度進(jìn)行預(yù)應(yīng)力混凝土結(jié)構(gòu)的設(shè)計(jì)計(jì)算(上)[J];工業(yè)建筑;1984年02期

10 孫寶俊;預(yù)應(yīng)力連續(xù)配筋的線形與等效荷載研究[J];工業(yè)建筑;1998年11期

本文編號(hào)：1476474