發(fā)布時(shí)間：2018-01-17 18:01

  本文關(guān)鍵詞：矮塔斜拉體系加固預(yù)應(yīng)力混凝土T型剛構(gòu)橋施工控制　出處：《長(zhǎng)安大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 加固 T型剛構(gòu) 矮塔斜拉 仿真分析 施工控制 荷載試驗(yàn)

【摘要】：在舊橋加固過程中,施工荷載、溫度的變化以及結(jié)構(gòu)體系調(diào)整等均可能導(dǎo)致原有結(jié)構(gòu)內(nèi)力與線形的變化,影響后加構(gòu)件的施工質(zhì)量,使原橋產(chǎn)生更嚴(yán)重的病害,有時(shí)可能會(huì)危及結(jié)構(gòu)安全。為了保證橋梁加固施工安全并最終實(shí)現(xiàn)加固設(shè)計(jì)理想狀態(tài),通過對(duì)加固施工過程進(jìn)行跟蹤監(jiān)測(cè)和分析,及時(shí)調(diào)整施工監(jiān)控指令是非常有必要的。本文結(jié)合某座預(yù)應(yīng)力混凝土T型剛構(gòu)橋加固施工全過程,開展混凝土橋梁加固施工監(jiān)控技術(shù)研究。某一四跨PC T型剛構(gòu)橋,帶有掛梁,因超載現(xiàn)象及自然條件變化等使該橋出現(xiàn)了懸臂端嚴(yán)重下?lián)�、箱梁局部開裂、橋面系損壞等病害,嚴(yán)重影響橋梁的正常使用。技術(shù)現(xiàn)狀決定采用矮塔斜拉體系對(duì)該橋進(jìn)行加固。針對(duì)每個(gè)T構(gòu)采用矮塔斜拉橋加固,增大橋墩橫截面尺寸,對(duì)裂縫粘貼碳纖維布并重新澆筑橋面鋪裝。為了保證加固成橋后的內(nèi)力和線形滿足加固設(shè)計(jì)要求,本文運(yùn)用橋梁專用軟件對(duì)舊橋結(jié)構(gòu)進(jìn)行了實(shí)際受力狀態(tài)分析,模擬分析了舊橋施工成橋狀態(tài)和砼收縮徐變影響下的應(yīng)力及變形,并在此基礎(chǔ)上通過在各控制截面關(guān)鍵位置布置相應(yīng)的傳感器,將各工況下傳感器所測(cè)得的實(shí)測(cè)數(shù)據(jù)與理論數(shù)據(jù)進(jìn)行對(duì)比分析,并與相關(guān)規(guī)定作對(duì)比,使整個(gè)加固施工過程處于可控范圍內(nèi),以此來保證加固施工過程的安全以及工程質(zhì)量。最后通過對(duì)比分析加固后的荷載試驗(yàn)實(shí)測(cè)數(shù)據(jù)與計(jì)算數(shù)據(jù),表明經(jīng)過加固橋梁結(jié)構(gòu)的強(qiáng)度和剛度有了很大程度地提高和改善,說明橋梁結(jié)構(gòu)加固設(shè)計(jì)效果較好。
[Abstract]:In the process of strengthening the old bridge, the change of construction load, temperature and structural system adjustment may lead to the change of internal force and line shape of the original structure, which will affect the construction quality of the post-added members and make the original bridge produce more serious diseases. In order to ensure the safety of bridge reinforcement construction and finally realize the ideal state of reinforcement design, the process of strengthening construction is monitored and analyzed. It is necessary to adjust the construction monitoring instruction in time. This paper combines the whole process of strengthening a prestressed concrete T-shaped rigid frame bridge. Research on the monitoring technology of concrete bridge strengthening construction. A four-span PC T rigid frame bridge with hanging beam, due to overload phenomenon and natural conditions change, the bridge appears the cantilever end of the serious deflection, box girder local cracking. Bridge deck damage and other diseases seriously affect the normal use of the bridge. The technical status of the bridge decided to use a low tower cable-stayed system to strengthen the bridge. For each T-structure the use of low-tower cable-stayed bridge reinforcement to increase the cross-section size of pier. In order to ensure that the internal force and line shape of the reinforced bridge meet the requirements of the design, the actual stress state of the old bridge structure is analyzed by using the special software of the bridge. The stress and deformation of the old bridge under the influence of the bridge state and concrete shrinkage and creep are simulated and analyzed. On this basis, the corresponding sensors are arranged at the key positions of each control section. The measured data measured by the sensor under each working condition are compared with the theoretical data, and compared with the relevant regulations, so that the whole reinforcement construction process is in a controllable range. In order to ensure the safety of the reinforcement construction process and the quality of the project. Finally, through the comparative analysis of the strengthened load test data measured and calculated data. It is shown that the strength and stiffness of the strengthened bridge structure have been greatly improved, which indicates that the design effect of the bridge structure strengthening is better.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：U445.72

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 楊立財(cái);矮塔斜拉橋施工控制技術(shù)[J];鐵道建筑;2005年07期

，

本文編號(hào)：1437323