吉林省二道白河玉帶橋檢測評估和加固研究
發(fā)布時間：2018-12-08 13:59
【摘要】：交通運輸線路的重要組成部分,是連接道路運輸間的紐帶。隨著我國交通運輸工程的高速發(fā)展,不僅有著大量新橋需要進行修建,同時也有很多服役年限已久的橋梁需要進行養(yǎng)護加固和拆除重建。這些老橋大多數(shù)采用舊規(guī)范的設計荷載,標準較低,現(xiàn)在已有許多出現(xiàn)了問題和缺陷,如強度不足、耐久性和安全性過低等。因此,對橋梁進行病害檢測評估并采取相應的加固措施,保證交通運輸?shù)男枨?已經(jīng)刻不容緩。服役年限已久的橋梁出現(xiàn)問題,一方面是由于自然環(huán)境如溫度、濕度等使得橋梁結(jié)構(gòu)發(fā)生老化,力學性能降低;另一方面是因為交通荷載的不斷作用,使得橋梁的承載能力和耐久性不斷下降。此類橋梁能否滿足現(xiàn)有交通量的需求,是人們所關(guān)心的問題。通過對橋梁進行檢測及評估,我們可以很好的判斷結(jié)構(gòu)的缺損及損傷程度,并用以估測其使用年限,也可進行橋梁的檔案備份管理,收集相關(guān)資料來指導今后的使用、維護過程。針對檢測評估后的橋梁,我們可以判斷其受損程度,根據(jù)其剩余承載力來采取相應的措施,對其進行加固或是重建,從而確保人民生命財產(chǎn)的安全,避免出現(xiàn)橋梁垮塌等重大事故。對具有一定剩余承載力的橋梁,可對其進行加固處理,這樣既經(jīng)濟合理又滿足我國目前可持續(xù)發(fā)展的要求。本文以二道白河一座跨徑為41m的斜腿剛構(gòu)為工程依托,主要開展了以下幾個方面的工作:1、對斜腿剛構(gòu)橋這種特殊的橋梁形式的受力特點進行了分析,總結(jié)其靜力特性和動力特性,考慮不同的斜腿傾角對其靜力、動力特性的影響。根據(jù)實際情況,從幾種常用的橋梁加固方法中,選定合適的斜腿剛構(gòu)橋加固方法,闡述了其加固原則,對斜腿剛構(gòu)橋的加固方法進行了探討。2、對玉帶橋進行外觀和無損檢測,收集橋梁基礎(chǔ)數(shù)據(jù),在此基礎(chǔ)上通過建立有限元模型對橋梁受力狀態(tài)進行分析,然后進行動靜載試驗,評價橋梁的承載能力。3、對比幾種加固方法,根據(jù)實際情況對橋梁進行加固,通過ansys建立加固后的橋梁模型,通過靜動載試驗分析加固后橋梁的實際工作情況。對比加固前后橋梁靜、動力參數(shù),分析選定加固方法的實際加固效果。
[Abstract]:The important part of transportation line is the link between road transportation. With the rapid development of transportation engineering in our country, there are not only a large number of new bridges to be built, but also many bridges with long service years that need maintenance, reinforcement and demolition and reconstruction. Most of these old bridges adopt the design load of the old code, and the standard is low. Now there are many problems and defects, such as insufficient strength, low durability and low safety, etc. Therefore, it is urgent to evaluate the bridge diseases and take corresponding reinforcement measures to ensure the demand of transportation. On the one hand, because of the natural environment such as temperature, humidity and so on, the bridge structure is aging and the mechanical performance is reduced. On the other hand, because of the continuous action of traffic load, the bearing capacity and durability of the bridge are decreasing. Whether this kind of bridge can meet the demand of the current traffic volume is the concern of people. Through the detection and evaluation of the bridge, we can judge the defect and damage degree of the structure very well, estimate its service life, also can carry on the archives backup management of the bridge, collect the relevant information to guide the use in the future. Maintenance process. In view of the bridge after detection and evaluation, we can judge the degree of damage, take appropriate measures according to its residual bearing capacity, strengthen or rebuild it, so as to ensure the safety of people's life and property. Avoid major accidents such as bridge collapse. The bridge with certain residual bearing capacity can be strengthened and treated, which is economical and reasonable and meets the requirement of sustainable development in our country at present. Based on an oblique legged rigid frame with a span of 41 m in Erdaobai River, this paper mainly carried out the following work: 1. The stress characteristics of this special bridge form are analyzed. The static and dynamic characteristics are summarized and the influence of oblique leg inclination on its static and dynamic characteristics is considered. According to the actual situation, from several commonly used bridge strengthening methods, the appropriate reinforcement method of oblique legged rigid frame bridge is selected, its reinforcement principle is expounded, and the reinforcement method of inclined leg rigid frame bridge is discussed. The appearance and nondestructive testing of the jade belt bridge are carried out, and the basic data of the bridge are collected. On this basis, the stress state of the bridge is analyzed by establishing the finite element model, and then the dynamic and static load tests are carried out to evaluate the bearing capacity of the bridge. Compared with several reinforcement methods, the bridge is strengthened according to the actual situation. The model of the strengthened bridge is established by ansys, and the actual working situation of the strengthened bridge is analyzed by static and dynamic load test. The static and dynamic parameters of the bridge beam before and after reinforcement are compared, and the actual reinforcement effect of the selected reinforcement method is analyzed.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U446;U445.72
[Abstract]:The important part of transportation line is the link between road transportation. With the rapid development of transportation engineering in our country, there are not only a large number of new bridges to be built, but also many bridges with long service years that need maintenance, reinforcement and demolition and reconstruction. Most of these old bridges adopt the design load of the old code, and the standard is low. Now there are many problems and defects, such as insufficient strength, low durability and low safety, etc. Therefore, it is urgent to evaluate the bridge diseases and take corresponding reinforcement measures to ensure the demand of transportation. On the one hand, because of the natural environment such as temperature, humidity and so on, the bridge structure is aging and the mechanical performance is reduced. On the other hand, because of the continuous action of traffic load, the bearing capacity and durability of the bridge are decreasing. Whether this kind of bridge can meet the demand of the current traffic volume is the concern of people. Through the detection and evaluation of the bridge, we can judge the defect and damage degree of the structure very well, estimate its service life, also can carry on the archives backup management of the bridge, collect the relevant information to guide the use in the future. Maintenance process. In view of the bridge after detection and evaluation, we can judge the degree of damage, take appropriate measures according to its residual bearing capacity, strengthen or rebuild it, so as to ensure the safety of people's life and property. Avoid major accidents such as bridge collapse. The bridge with certain residual bearing capacity can be strengthened and treated, which is economical and reasonable and meets the requirement of sustainable development in our country at present. Based on an oblique legged rigid frame with a span of 41 m in Erdaobai River, this paper mainly carried out the following work: 1. The stress characteristics of this special bridge form are analyzed. The static and dynamic characteristics are summarized and the influence of oblique leg inclination on its static and dynamic characteristics is considered. According to the actual situation, from several commonly used bridge strengthening methods, the appropriate reinforcement method of oblique legged rigid frame bridge is selected, its reinforcement principle is expounded, and the reinforcement method of inclined leg rigid frame bridge is discussed. The appearance and nondestructive testing of the jade belt bridge are carried out, and the basic data of the bridge are collected. On this basis, the stress state of the bridge is analyzed by establishing the finite element model, and then the dynamic and static load tests are carried out to evaluate the bearing capacity of the bridge. Compared with several reinforcement methods, the bridge is strengthened according to the actual situation. The model of the strengthened bridge is established by ansys, and the actual working situation of the strengthened bridge is analyzed by static and dynamic load test. The static and dynamic parameters of the bridge beam before and after reinforcement are compared, and the actual reinforcement effect of the selected reinforcement method is analyzed.
【學位授予單位】：吉林大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：U446;U445.72
【參考文獻】
相關(guān)期刊論文 前10條
1 李紅;劉勝春;;增大截面法加固鋼筋混凝土構(gòu)件的正截面承載力研究[J];北京交通大學學報;2015年04期
2 高丹盈;房棟;祝玉斌;;體外預應力FRP筋加固混凝土單向板抗裂及剛度計算方法[J];土木工程學報;2015年03期
3 徐禮華;許鋒;黃樂;;CFRP筋體外預應力加固T形截面混凝土梁短期撓度計算方法[J];工程力學;2015年01期
4 戚家南;王景全;呂志濤;;體外預應力混凝土梁受剪承載力計算方法研究[J];建筑結(jié)構(gòu)學報;2015年01期
5 李睿;朱德祥;李志中;劉兵;;基于病害檢測的橋梁下部結(jié)構(gòu)震害預測方法研究[J];工程抗震與加固改造;2014年01期
6 劉浩;王婷婷;;大跨度橋梁結(jié)構(gòu)的承載力檢測及加固方法研究[J];科技通報;2013年07期
7 秦世強;蒲黔輝;施洲;;環(huán)境激勵下大型橋梁模態(tài)參數(shù)識別的一種方法[J];振動與沖擊;2012年02期
8 韓東穎;時培明;;基于頻率和當量損傷系數(shù)的井架鋼結(jié)構(gòu)損傷識別[J];工程力學;2011年09期
9 朱宏平;余t，
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