本文選題：架空直立式碼頭 + 鋼護(hù)筒鋼筋混凝土樁��； 參考：《重慶交通大學(xué)》2014年碩士論文

【摘要】：本文結(jié)合“重慶港大水位差深水碼頭設(shè)計(jì)、建設(shè)關(guān)鍵技術(shù)攻關(guān)與應(yīng)用”研究項(xiàng)目,依托重慶果園港碼頭結(jié)構(gòu)二期工程,針對(duì)鋼護(hù)筒鋼筋混凝土樁架空直立式碼頭結(jié)構(gòu)進(jìn)行動(dòng)力響應(yīng)試驗(yàn)與相應(yīng)瞬態(tài)動(dòng)力時(shí)程分析的數(shù)值模擬。主要研究?jī)?nèi)容及結(jié)論如下： (1)利用有限元軟件Ansys對(duì)該種結(jié)構(gòu)型式碼頭的試驗(yàn)?zāi)Ｐ徒Y(jié)構(gòu)進(jìn)行了模態(tài)分析,得到結(jié)構(gòu)的動(dòng)力特性。通過(guò)得到的結(jié)構(gòu)頻率與振型對(duì)結(jié)構(gòu)的剛度分布情況進(jìn)行分析,分析顯示結(jié)構(gòu)中橫向構(gòu)件使排架具有較好的整體性和較大剛度,而縱向構(gòu)件所能提供的剛度補(bǔ)強(qiáng)偏弱,指出應(yīng)當(dāng)適當(dāng)加強(qiáng)碼頭結(jié)構(gòu)的縱向剛度,提出對(duì)結(jié)構(gòu)的優(yōu)化,為相關(guān)設(shè)計(jì)提供參考。 (2)依據(jù)碼頭原型結(jié)構(gòu)進(jìn)行碼頭模型結(jié)構(gòu)設(shè)計(jì),完成了模型材料的確定,材料參數(shù)的確定,模型材料的換算,模型的制作,加載設(shè)計(jì)、測(cè)點(diǎn)斷面的布置,進(jìn)而完成了碼頭結(jié)構(gòu)的動(dòng)力響應(yīng)試驗(yàn)。利用專業(yè)函數(shù)繪圖軟件origin7.5對(duì)試驗(yàn)數(shù)據(jù)進(jìn)行非線性擬合處理。 (3)利用有限元軟件Ansys建立考慮鋼護(hù)筒與鋼筋混凝土樁接觸的實(shí)體模型,進(jìn)行結(jié)構(gòu)瞬態(tài)動(dòng)力時(shí)程分析,并將計(jì)算結(jié)果與試驗(yàn)數(shù)據(jù)進(jìn)行對(duì)比,二者吻合程度較好。得到碼頭結(jié)構(gòu)中鋼筋混凝土樁、鋼橫撐、鋼靠船立柱以及鋼前撐等構(gòu)件的力學(xué)表現(xiàn),指出在水平動(dòng)載作用下結(jié)構(gòu)中的薄弱位置,可為該類型式的碼頭結(jié)構(gòu)的優(yōu)化布置設(shè)計(jì)提供參考。 (4)有限元計(jì)算結(jié)果顯示,結(jié)構(gòu)中節(jié)點(diǎn)位移、應(yīng)力等響應(yīng)時(shí)程峰值均出現(xiàn)于荷載時(shí)程峰值之后,說(shuō)明能量在結(jié)構(gòu)中的傳遞有一定滯后效應(yīng)；鋼護(hù)筒鋼筋混凝土樁在水平動(dòng)載作用下,鋼護(hù)筒構(gòu)件的等效應(yīng)力峰值普遍大于鋼筋混凝土樁,說(shuō)明結(jié)構(gòu)受載時(shí),鋼護(hù)筒承受較大的能量傳遞而鋼筋混凝土樁的力學(xué)性能發(fā)揮不夠充分；前排樁岸側(cè)與江側(cè)的等效應(yīng)力峰值趨勢(shì)為先增大后減小再增大,而后三排樁岸側(cè)與江側(cè)的等效應(yīng)力峰值呈現(xiàn)先減小再增大,然后再減小,最后再增大的趨勢(shì),應(yīng)力變化轉(zhuǎn)折處多集中在鋼橫撐、鋼前撐及鋼護(hù)筒底部。
[Abstract]:Based on the research project of "Design, Construction and Application of key Technologies for Deepwater Wharf with Water level difference in Chongqing Port," this paper relies on the second phase of the structure of Chongqing Orchard Port. The dynamic response test and the numerical simulation of the transient dynamic history analysis of the steel-protected reinforced concrete pile-mounted vertical wharf structure are carried out. The main contents and conclusions are as follows: 1) the modal analysis of the test model structure of the structure type wharf is carried out by using the finite element software Ansys, and the dynamic characteristics of the structure are obtained. The stiffness distribution of the structure is analyzed by the frequency and mode of the structure obtained. The analysis shows that the transverse members of the structure make the bent frame have better integrity and greater stiffness, while the longitudinal members can provide weak stiffness. It is pointed out that the longitudinal stiffness of the wharf structure should be strengthened properly and the optimization of the structure should be put forward to provide reference for the related design. According to the prototype structure of the wharf, the model structure of the wharf is designed. The determination of the model material, the determination of the material parameters, the conversion of the model material, the making of the model, the loading design, the layout of the section of the measuring point are completed. Then the dynamic response test of wharf structure is completed. This paper deals with the nonlinear fitting of test data by professional function drawing software origin7.5. The finite element software Ansys is used to establish a solid model considering the contact between the steel retaining cylinder and the reinforced concrete pile. The transient dynamic time history analysis of the structure is carried out, and the calculated results are compared with the experimental data, and the results are in good agreement with each other. The mechanical behaviors of reinforced concrete pile, steel transverse brace, steel berthing column and steel front brace in wharf structure are obtained, and the weak position of the structure under horizontal dynamic load is pointed out. It can provide reference for the optimal layout design of this type of wharf structure. 4) the results of finite element analysis show that the peak value of response time history such as node displacement and stress appears after the peak value of load history, which indicates that the energy transfer in the structure has a hysteresis effect. Under the action of horizontal dynamic load, the peak value of equivalent stress of steel retaining tube members is generally greater than that of reinforced concrete piles, which shows that when the structure is loaded, However, the mechanical properties of reinforced concrete piles are not played well enough, and the peak equivalent stress of the bank side of the front row pile and the river side increases firstly and then decreases and then increases. The peak value of the equivalent stress of the bank side and the river side of the third row pile first decreases and then increases, then decreases, and then increases again. The stress change turning point is concentrated in the steel transverse brace, the steel front brace and the bottom of the steel guard tube.
【學(xué)位授予單位】：重慶交通大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U656.124

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本文編號(hào)：1965231