發(fā)布時(shí)間：2018-06-21 14:17

  本文選題：設(shè)計(jì)荷載 + 線形　； 參考：《昆明理工大學(xué)》2017年碩士論文

【摘要】：對(duì)一座橋梁施工質(zhì)量的衡量,其主要標(biāo)準(zhǔn)就是看橋梁的實(shí)際受力狀態(tài)及線形是否達(dá)到設(shè)計(jì)的要求。在大跨徑拱橋中,拱橋內(nèi)力的分布在很大程度上取決于拱圈線形,而對(duì)其進(jìn)行線形控制就是為了使內(nèi)力及成橋線形達(dá)到設(shè)計(jì)要求。對(duì)于大跨度鋼筋混凝土拱橋,線形控制就是使拱箱的實(shí)際成拱線形在設(shè)計(jì)要求范圍內(nèi),并使其達(dá)到目標(biāo)成拱線形。本文以位于云南省迪慶州瀾滄江上的托巴大橋?yàn)楣こ瘫尘?對(duì)以上問(wèn)題進(jìn)行研究,該橋?qū)儆谥剌d拱橋。由于工程實(shí)際的需要,汽車-60級(jí),掛車-300驗(yàn)算(當(dāng)使用汽-60,掛-300的荷載設(shè)計(jì)時(shí),橋梁上至少可以通過(guò)300噸的汽車荷載)。(1)拱橋載重越大,其設(shè)計(jì)要求越高,對(duì)其線形和應(yīng)力則更需是在設(shè)計(jì)要求之內(nèi)。應(yīng)用有限元軟件對(duì)該橋施工預(yù)拱度進(jìn)行合理設(shè)置,分析重載拱橋的預(yù)拱度設(shè)置。為今后重載拱橋的預(yù)拱度設(shè)置提供一定的參考依據(jù)。(2)重載拱橋的設(shè)計(jì)載重越是增大,其對(duì)線形的影響越是嚴(yán)重。因各種誤差因素的影響,實(shí)測(cè)線形是很難做到與設(shè)計(jì)線形完全一致。結(jié)合有限元分析軟件對(duì)施工各階段的沉降進(jìn)行分析,并分析拱上建筑隊(duì)拱圈線形的影響。(3)論文結(jié)合托巴拱橋,對(duì)拱上建筑應(yīng)力對(duì)線形的影響進(jìn)行分析研究,同時(shí)總結(jié)各施工階段應(yīng)力和線形之間的影響和變化規(guī)律。分析重載拱橋施工中應(yīng)力和線形之間關(guān)系,并通過(guò)此規(guī)律,在以后的重載鋼筋混凝土拱橋施工中,可以通過(guò)位移變化情況,大概計(jì)算出全橋的應(yīng)力分布情況,能在一定程度上解決應(yīng)力監(jiān)測(cè)困難的問(wèn)題。對(duì)重載拱橋拱圈最不利受力和位移變化最大位置進(jìn)行重點(diǎn)監(jiān)控,對(duì)今后重載拱橋在拱圈線形和應(yīng)力控制方面有一定的參考意義。(4)對(duì)托巴大橋進(jìn)行荷載試驗(yàn),檢測(cè)其承載力是否達(dá)到設(shè)計(jì)荷載標(biāo)準(zhǔn)。通過(guò)試驗(yàn)研究分析重載拱橋的線形、內(nèi)力受外力影響與普通橋梁的不同,對(duì)其穩(wěn)定性進(jìn)行分析判斷,為以后同類橋梁的施工及監(jiān)控提供參照研究打下一定基礎(chǔ)。
[Abstract]:To measure the construction quality of a bridge, its main criterion is to see whether the actual force state and the line shape of the bridge meet the design requirements. In the long span arch bridge, the distribution of the internal force of the arch bridge to a great extent depends on the arch ring shape, and the linear control of the arch bridge is to make the internal force and the bridge alignment meet the design requirements. For long span reinforced concrete arch bridge, linear control is to make the actual arch shape of the arch box within the design requirements, and to achieve the goal of the arch line. In this paper, the Toba Bridge, located on the Lancang River in Diqing Prefecture, Yunnan Province, is taken as the engineering background, and the above problems are studied. The bridge belongs to the heavy-haul arch bridge. Because of the actual engineering needs, the larger the load of the arch bridge, the higher the design requirement of the arch bridge, the greater the load on the arch bridge is, the greater the load of the automobile class -60, the trailer -300 (when the load of the automobile is 60, hanging, 300) is used, the bridge can pass through at least 300 tons of vehicle load. For its shape and stress, it is more necessary to be within the design requirements. This paper applies finite element software to set the pre-arch degree of the bridge, and analyzes the pre-arch degree setting of the heavy-load arch bridge. The design load of the heavy-haul arch bridge increases, and the influence on the alignment becomes more serious, which provides a certain reference basis for setting the pre-arch degree of the heavy-haul arch bridge in the future. Due to the influence of various error factors, it is difficult for the measured alignment to be completely consistent with the design line. Combined with finite element analysis software, the settlement of each stage of construction is analyzed, and the influence of arch ring shape on arch construction team is analyzed in this paper. In combination with Toba arch bridge, the influence of building stress on line shape on arch is analyzed and studied in this paper. At the same time, the influence and variation law of stress and line shape in each construction stage are summarized. This paper analyzes the relationship between stress and line shape in the construction of heavy-duty arch bridge, and through this rule, the stress distribution of the whole bridge can be calculated by the change of displacement in the later construction of heavy-duty reinforced concrete arch bridge. It can solve the problem of stress monitoring to some extent. This paper focuses on monitoring the most unfavorable force and the maximum position of displacement change of arch ring of heavy-haul arch bridge, which has certain reference significance for the arch ring shape and stress control of heavy-haul arch bridge in the future. Check whether the bearing capacity is up to the design load standard. Through experimental study and analysis of the alignment of heavy-duty arch bridge, the internal force affected by external force is different from that of common bridge. The stability of the bridge is analyzed and judged, which will provide a reference for the construction and monitoring of similar bridges in the future.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：U445.4

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