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  本文選題：城市防洪 + 垂直升降式�。� 參考：《天津大學》2014年碩士論文

【摘要】：隨著城市發(fā)展進程的加快,沿海及濱河城市對于城市防洪安全的標準也將逐步提高,然而由于城市土地資源及城市景觀建設的限制,傳統(tǒng)城市防洪工程已經不能滿足相應的使用要求。為此,本文提出新型垂直升降式防洪(潮)工程結構方案,既避免了對城市寶貴土地資源的占用,同時為城市景觀建設提供寬闊的視野。該方案結構形式新穎,國內外沒有工程應用先例,為確保該方案結構的可建設實施性,本文通過建立數(shù)值模型,借助大型有限元計算軟件Ansys,對該結構的靜力及動力響應進行數(shù)值模擬分析。具體包括以下內容:首先,系統(tǒng)地總結國內外城市防洪工程建設的現(xiàn)狀,對目前區(qū)別于傳統(tǒng)形式的城市防洪結構形式的優(yōu)缺點進行對比分析,在此基礎上提出新型垂直升降式防洪(潮)堤技術方案,并對該方案進行系統(tǒng)的介紹。其次,通過靜力分析,對該方案所提出的結構在靜力作用下的應力及變形撓度進行統(tǒng)計,數(shù)值模擬結果表明:在靜力作用下結構的剛度及應力均滿足規(guī)范設計要求,并且具有較高的安全儲備系數(shù),其相對撓度最大值為1/1630,小于規(guī)范允許值1/600。地基沉降微弱,結構沉降量在允許的范圍之內,相鄰結構之間可協(xié)調運行。再次,通過動力分析中的模態(tài)分析,對整體結構的固有頻率進行探索。考慮到鋼閘板前的水位是變化的,模態(tài)分析過程中分別計算結構的干、濕兩種模態(tài)。計算結果表明,附加水質量對結構的固有頻率影響很大,一階固有頻率的變化區(qū)間為12.72~18.91Hz,各階頻率最大降幅為37.5%,盡管如此,該結構的整體固有頻率仍遠高于外界激勵荷載的頻率,因此結構具有較高的抗共振破壞風險的能力。最后,根據該區(qū)域特征選取該區(qū)域波浪荷載的計算方式,并通過施加波浪荷載對結構進行動態(tài)響應分析。設計工況與校核工況下不同波浪荷載作用下,對鋼閘板的應力及位移變化最大值進行統(tǒng)計對比分析。結果表明:在兩種工況下結構振動微弱,并且強度足夠。
[Abstract]:With the acceleration of urban development, coastal and riverside cities will gradually improve the safety of urban flood control standards, but due to urban land resources and urban landscape construction constraints, Traditional urban flood control projects can not meet the corresponding requirements. Therefore, this paper puts forward a new vertical lifting flood control (tide) engineering structure scheme, which can avoid the occupation of the precious land resources of the city and provide a broad view for the urban landscape construction at the same time. The structure of the scheme is novel and there is no engineering application precedent at home and abroad. In order to ensure the constructability of the scheme structure, a numerical model is established in this paper. The static and dynamic responses of the structure are simulated and analyzed by means of finite element software Ansys. The specific contents are as follows: first, systematically summarize the current situation of urban flood control engineering construction at home and abroad, and compare and analyze the advantages and disadvantages of the current form of urban flood control structure, which is different from the traditional form of urban flood control structure. On this basis, a new vertical lifting flood control (tide) embankment technical scheme is put forward, and the scheme is introduced systematically. Secondly, through static analysis, the stress and deformation deflection of the structure under static force are analyzed. The numerical simulation results show that the stiffness and stress of the structure under static force can meet the design requirements of the code. The maximum relative deflection is 1 / 1630, which is less than the allowable value of 1 / 600. The settlement of the foundation is weak, the settlement of the structure is within the allowable range, and the adjacent structures can operate harmoniously. Thirdly, the natural frequency of the whole structure is explored by modal analysis in dynamic analysis. Considering the variation of the water level in front of the steel gate, the dry and wet modes of the structure are calculated in the process of modal analysis. The calculation results show that the mass of additional water has a great influence on the natural frequency of the structure. The variation range of the first order natural frequency is 12.72 脳 18.91Hz. the maximum decrease of each order frequency is 37.5hz. however, the overall natural frequency of the structure is still much higher than the frequency of the external excitation load. Therefore, the structure has a higher ability to resist the risk of resonance damage. Finally, according to the characteristics of the region, the calculation method of the wave load in the region is selected, and the dynamic response of the structure is analyzed by applying the wave load. Under different wave loads under design and check conditions, the maximum stress and displacement variation of steel sluice plate are analyzed statistically and contrastively. The results show that the vibration of the structure is weak and the strength is enough under two conditions.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU998.4;TV871

【參考文獻】

相關期刊論文 前10條

1 陸國東;鄒萬杰;陸進;;地震影響分別按外荷載和譜響應處理下的高壓輸電桿塔分析[J];四川建材;2014年01期

2 施健;武美萍;劉靜;;LED粘片機偏心軸的模態(tài)分析[J];機械制造;2013年04期

3 張黎;;基于Ansys的地下結構模態(tài)分析[J];工程與建設;2013年02期

4 金明宇;;城市區(qū)域防洪治理探析[J];中國水運(下半月);2012年12期

5 吳東平;;簡諧荷載作用下拱型結構線性動力穩(wěn)定性[J];山西建筑;2012年22期

6 楊華;葉蘭華;;水工鋼閘門防腐的方法及優(yōu)缺點[J];科技傳播;2012年06期

7 游瀟;蘇小卒;;簡析非線性有限元法[J];江西科學;2012年01期

8 馬百靈;李向陽;;梅州城區(qū)防洪堤玻璃鋼子堤新技術研究[J];廣西水利水電;2011年04期

9 朱衛(wèi)波;楊兆建;王義亮;;采煤機行星齒輪減速機構太陽輪瞬態(tài)動力學分析[J];煤礦機械;2010年10期

10 劉煒;吳運新;;超聲換能器ANSYS建模及諧響應分析[J];科學技術與工程;2009年10期

，

本文編號：1906492