本文關(guān)鍵詞： 高墩大跨 混凝土梁橋 正常使用性能 荷載試驗(yàn) 結(jié)構(gòu)性能評(píng)價(jià)　出處：《哈爾濱工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：高墩大跨混凝土梁橋在我國已取得了較大的發(fā)展,尤其是西部地區(qū)同類橋梁的建設(shè)數(shù)量也越來越多,因此,開展該類橋梁的正常使用性能評(píng)價(jià)研究,對(duì)于確保同類橋梁的安全使用以及完善橋梁的正常使用性能評(píng)價(jià)方法都具有非常重要的現(xiàn)實(shí)意義。基于這一背景,針對(duì)高墩大跨混凝土梁橋的正常使用性能評(píng)價(jià)問題,本文對(duì)高墩大跨混凝土梁橋的特點(diǎn)與病害、結(jié)構(gòu)荷載試驗(yàn)方法以及正常使用性能評(píng)價(jià)方法進(jìn)行了相應(yīng)研究。詳細(xì)討論了高墩大跨混凝土梁橋的特點(diǎn),具體包括:構(gòu)造特點(diǎn)、結(jié)構(gòu)優(yōu)缺點(diǎn)、受力特點(diǎn)以及技術(shù)經(jīng)濟(jì)特點(diǎn);在此基礎(chǔ)上,進(jìn)一步研究了此類橋梁可能發(fā)生的病害,具體包括:裂縫問題、下?lián)喜『Α⒊休d能力不足以及墩臺(tái)及其它相關(guān)病害。重點(diǎn)研究了高墩大跨混凝土梁橋的荷載試驗(yàn)方法與正常使用性能評(píng)價(jià)方法。根據(jù)靜動(dòng)載試驗(yàn)評(píng)定技術(shù)規(guī)程,綜合考慮各測(cè)試截面的內(nèi)力與撓度影響線以確定各試驗(yàn)工況的最不利布載形式,從而實(shí)現(xiàn)對(duì)靜、動(dòng)載試驗(yàn)的測(cè)試截面、測(cè)點(diǎn)布置以及加載工況的設(shè)計(jì);采用基于時(shí)域的模態(tài)參數(shù)識(shí)別算法,完成基于模態(tài)參數(shù)的橋梁結(jié)構(gòu)正常使用動(dòng)力性能的評(píng)價(jià)。以西部大通道包(頭)北(海)線陜西境延安至黃陵段高速公路上的洛河特大橋?yàn)槔?對(duì)正常使用性能評(píng)價(jià)的荷載試驗(yàn)方法進(jìn)行了工程驗(yàn)證。由該橋的各類試驗(yàn)數(shù)據(jù)可知:該橋在設(shè)計(jì)荷載作用下處于彈性工作狀態(tài),且有較充足的安全儲(chǔ)備;而且該橋的豎向振動(dòng)頻率實(shí)測(cè)值較理論值大,結(jié)構(gòu)整體性好,滿足要求。
[Abstract]:High-pier long-span concrete beam bridge has made great progress in China, especially in the western region of the same type of bridge construction more and more, therefore, to carry out the normal use of this type of bridge performance evaluation research. Based on this background, it is very important to ensure the safe use of similar bridges and to improve the evaluation methods of bridge normal service performance. Aiming at the problem of evaluating the normal service performance of long span concrete beam bridge with high piers, the characteristics and diseases of high pier and long span concrete beam bridge are discussed in this paper. The structural load test method and normal service performance evaluation method are studied in this paper. The characteristics of high pier and long span concrete beam bridge are discussed in detail including the structure characteristics advantages and disadvantages of the structure. Stress characteristics and technical and economic characteristics; On this basis, the possible diseases of this kind of bridge are further studied, including: crack problem, deflection disease. The load-test method and normal performance evaluation method of long-span concrete beam bridge with high piers are mainly studied. The technical rules for evaluating static and dynamic load test are presented. Considering the influence lines of internal force and deflection of each test section synthetically to determine the most unfavorable load distribution form of each test condition, so as to realize the design of test section, measuring point arrangement and loading condition of static and dynamic load test; The modal parameter identification algorithm based on time domain is adopted. The evaluation of the dynamic performance of bridge structure based on modal parameters is completed. Taking the Luohe Bridge on the highway between Yanan and Huangling section of Shaanxi Province as an example, the north (head) north (sea) line of the western big passageway is taken as an example. According to the test data of the bridge, the bridge is in elastic working state under the action of design load, and it has sufficient safety reserve; Moreover, the measured values of vertical vibration frequency of the bridge are larger than the theoretical values, and the structural integrity is good.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U446

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