本文選題：覆土波紋鋼板橋涵 + 腐蝕��； 參考：《北京交通大學(xué)》2017年碩士論文

【摘要】：波紋鋼板橋涵是近十幾年來引入到我國道路橋涵工程領(lǐng)域的新的結(jié)構(gòu)形式,由于其施工速度快、適用范圍廣、綜合造價低、綠色環(huán)保等諸多優(yōu)點,目前已經(jīng)作為傳統(tǒng)小跨徑圬工橋涵的替代,發(fā)展非常迅猛。但對管拱形波紋鋼板橋涵的受力性能方面的研究工作仍處于起步階段,同時,在考慮腐蝕影響的波紋鋼板橋涵受力性能方面的研究基本沒有開展。因此,研究不同斷面類型、考慮腐蝕影響具有重要的參考價值。本文以京新高速公路處于鹽漬土地區(qū)的某跨徑為4.2m的覆土波紋鋼板管拱形橋涵為依托,通過現(xiàn)場監(jiān)測試驗以及有限元數(shù)值模擬的方法來研究其受力和變形性能�，F(xiàn)場監(jiān)測了管涵在連續(xù)施工過程中兩個不同截面上對應(yīng)測點的位移、應(yīng)變及土壓力。通過兩個截面實測數(shù)據(jù)來分析管拱的受力性能,并結(jié)合施工過程分析了引起管涵發(fā)生對應(yīng)變形形式的原因。隨后,利用ANSYS建立了簡化的二維平面應(yīng)變有限元模型通過有限元模擬值與實測值進(jìn)行對比,分析了施工過程中隨填土高度增加管涵變形和土壓力的變化規(guī)律,說明用被動土壓力考慮土體壓實影響的有限元模型更符合實際施工過程,與實測結(jié)果更為接近。接著,通過現(xiàn)場腐蝕試驗和鹽霧試驗的方法,研究了波紋鋼板橋涵的耐腐蝕性,對比分析了不同防腐措施的特點。最后,利用有限元軟件ABAQUS建立了能夠反映實際波形和腐蝕深度的三維實體有限元模型,通過三維有限元模型,進(jìn)一步分析了不同腐蝕深度波紋鋼板橋涵的應(yīng)力和位移變化情況,以及軸向腐蝕和周向腐蝕對結(jié)構(gòu)的應(yīng)力和位移的影響。結(jié)果表明:利用熱鍍鋅加瀝青涂層的防腐措施防腐效果較好;隨著腐蝕深度的增加,結(jié)構(gòu)的位移和最大應(yīng)力值均逐漸增大,且最大應(yīng)力始終出現(xiàn)在腐蝕區(qū)域之內(nèi),同時,周向腐蝕比軸向腐蝕對結(jié)構(gòu)的影響更明顯。通過以上研究,為管拱形覆土波紋鋼板管涵的防腐設(shè)計與施工提供了參考。
[Abstract]:Corrugated steel plate bridge and culvert is a new structural form introduced into the field of road bridge and culvert engineering in our country in recent ten years. Because of its many advantages such as fast construction speed, wide application scope, low comprehensive cost, green environmental protection, etc. At present, it has been used as a substitute for traditional small-span masonry bridges and culverts. However, the research on the mechanical behavior of pipe arch corrugated steel plate bridge and culvert is still in the initial stage, and the research on the mechanical behavior of corrugated steel plate bridge and culvert considering the influence of corrosion has not been carried out. Therefore, it has important reference value to study different section types and consider corrosion effect. Based on the arch bridge and culvert of corrugated steel pipe with a span of 4.2 m in the saline soil area of Jingxin Expressway, the stress and deformation properties of the bridge and culvert are studied by field monitoring test and finite element numerical simulation. The displacement, strain and earth pressure of two different sections of pipe culvert in continuous construction are monitored. Based on the measured data of two sections, the mechanical behavior of the pipe arch is analyzed, and the causes of the corresponding deformation of the pipe culvert are analyzed in combination with the construction process. Then, the simplified two-dimensional plane strain finite element model is established by using ANSYS, and the variation law of pipe deformation and earth pressure with the increase of filling height is analyzed by comparing the finite element simulation value with the measured value. It is shown that the finite element model with passive earth pressure considering the influence of soil compaction is more in line with the actual construction process and is closer to the measured results. Then, the corrosion resistance of corrugated steel plate bridge and culvert is studied by means of field corrosion test and salt spray test, and the characteristics of different anticorrosion measures are compared and analyzed. Finally, the three-dimensional solid finite element model which can reflect the actual waveform and corrosion depth is established by using the finite element software ABAQUS. Through the three-dimensional finite element model, the stress and displacement changes of corrugated steel plate bridge and culvert with different corrosion depth are further analyzed. And the influence of axial corrosion and circumferential corrosion on the stress and displacement of the structure. The results show that the anticorrosive effect of hot-dip galvanizing and asphalt coating is good, and with the increase of corrosion depth, the displacement and maximum stress of the structure increase gradually, and the maximum stress always appears in the corrosion zone, and at the same time, The effect of circumferential corrosion is more obvious than that of axial corrosion. The above research provides a reference for the anticorrosion design and construction of pipe arch-shaped corrugated steel pipe culvert.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：U446

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