本文選題：橋梁工程　切入點(diǎn)：橋梁加固　出處：《長(zhǎng)安大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：既有的公路橋梁修建于不同的各個(gè)時(shí)期，且多數(shù)已年代久遠(yuǎn)，其建筑材料質(zhì)量落后，設(shè)計(jì)荷載等級(jí)偏低，許多橋梁已經(jīng)無(wú)法滿足目前大交通量的需求。為此，，本文結(jié)合石安高速公路典型橋型開展對(duì)既有橋型開展加固改造與擴(kuò)寬拼接研究。 首先，針對(duì)既有橋梁的承載能力進(jìn)行評(píng)定，綜合考慮極限狀態(tài)、正常使用極限狀態(tài)和抗震要求等影響因素后，評(píng)定既有橋梁在85規(guī)范或04規(guī)范公路荷載作用下，其極限承載能力能否滿足受力要求。 其次，針對(duì)不滿足承載力要求的橋梁結(jié)構(gòu)提出可靠的加固改造措施，使橋梁的抗彎和抗剪承載力滿足正常使用要求，并分析加固后結(jié)構(gòu)的極限承載力能否達(dá)到了正常的使用要求。 然后，對(duì)不滿足使用功能要求的橋梁進(jìn)行擴(kuò)寬拼接研究，提出典型橋型的擴(kuò)寬拼接方案，并對(duì)拼接設(shè)計(jì)方案進(jìn)行結(jié)構(gòu)驗(yàn)算及承載力分析。 總之，通過(guò)既有典型橋梁的加固及擴(kuò)寬拼接設(shè)計(jì)研究，提出常規(guī)既有橋梁的擴(kuò)寬加固的設(shè)計(jì)方法、適用條件、設(shè)計(jì)要點(diǎn)、步驟等，能夠?yàn)榧扔袠蛄旱臄U(kuò)寬加固提供重要的理論依據(jù)和技術(shù)支撐。
[Abstract]:Existing highway bridges are built in different periods, most of them are old, the quality of building materials is backward, the design load is low, many bridges can not meet the needs of large traffic volume. Combined with typical bridge type of Shi'an Expressway, this paper studies on strengthening and widening joint of existing bridge type. First of all, the bearing capacity of existing bridges is evaluated. After considering the limit state, normal use limit state and seismic requirements, the existing bridges are evaluated under the load of the 85 or 04 code highway. Its ultimate bearing capacity can meet the stress requirements. Secondly, for the bridge structure which does not meet the requirements of bearing capacity, a reliable reinforcement and renovation measures are proposed to make the flexural and shear bearing capacity of the bridge meet the normal service requirements. And analyze whether the ultimate bearing capacity of the strengthened structure can meet the normal requirements. Then, the widening splicing of bridges which do not meet the functional requirements is studied, and the widening splicing scheme of typical bridges is put forward, and the structural checking calculation and carrying capacity analysis of the splicing design scheme are carried out. In a word, through the study of strengthening and widening joint design of existing typical bridges, the design method, applicable conditions, design essentials and steps of widening and strengthening of conventional existing bridges are put forward. It can provide important theoretical basis and technical support for widening and strengthening of existing bridges.
【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】：2014
【分類號(hào)】：U445.72

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