本文選題：架空直立式碼頭 + 鋼護筒鋼筋混凝土樁��； 參考：《重慶交通大學》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計、建設關鍵技術攻關與應用”研究項目,依托重慶果園港碼頭結(jié)構(gòu)二期工程,針對鋼護筒鋼筋混凝土樁架空直立式碼頭結(jié)構(gòu)進行動力響應試驗與相應瞬態(tài)動力時程分析的數(shù)值模擬。主要研究內(nèi)容及結(jié)論如下： (1)利用有限元軟件Ansys對該種結(jié)構(gòu)型式碼頭的試驗模型結(jié)構(gòu)進行了模態(tài)分析,得到結(jié)構(gòu)的動力特性。通過得到的結(jié)構(gòu)頻率與振型對結(jié)構(gòu)的剛度分布情況進行分析,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強偏弱,指出應當適當加強碼頭結(jié)構(gòu)的縱向剛度,提出對結(jié)構(gòu)的優(yōu)化,為相關設計提供參考。 (2)依據(jù)碼頭原型結(jié)構(gòu)進行碼頭模型結(jié)構(gòu)設計,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,加載設計、測點斷面的布置,進而完成了碼頭結(jié)構(gòu)的動力響應試驗。利用專業(yè)函數(shù)繪圖軟件origin7.5對試驗數(shù)據(jù)進行非線性擬合處理。 (3)利用有限元軟件Ansys建立考慮鋼護筒與鋼筋混凝土樁接觸的實體模型,進行結(jié)構(gòu)瞬態(tài)動力時程分析,并將計算結(jié)果與試驗數(shù)據(jù)進行對比,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)件的力學表現(xiàn),指出在水平動載作用下結(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)化布置設計提供參考。 (4)有限元計算結(jié)果顯示,結(jié)構(gòu)中節(jié)點位移、應力等響應時程峰值均出現(xiàn)于荷載時程峰值之后,說明能量在結(jié)構(gòu)中的傳遞有一定滯后效應；鋼護筒鋼筋混凝土樁在水平動載作用下,鋼護筒構(gòu)件的等效應力峰值普遍大于鋼筋混凝土樁,說明結(jié)構(gòu)受載時,鋼護筒承受較大的能量傳遞而鋼筋混凝土樁的力學性能發(fā)揮不夠充分；前排樁岸側(cè)與江側(cè)的等效應力峰值趨勢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,應力變化轉(zhuǎn)折處多集中在鋼橫撐、鋼前撐及鋼護筒底部。
[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.
【學位授予單位】：重慶交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：U656.124

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本文編號：1965231