【摘要】：閘墩是水利樞紐中泄水建筑物的主要組成部分,是承受閘門作用力,保證泄水建筑物正常運行的關(guān)鍵性建筑物之一。隨著水利水電事業(yè)的發(fā)展,泄水建筑物擋水閘門的工作水頭不斷提高,閘墩承受的作用力不斷加大,常規(guī)鋼筋混凝土閘墩已日益難滿足安全有效的運行需求,因此很有必要尋求一種新型閘墩結(jié)構(gòu),確保閘墩在大推力作用下能可靠運行。根據(jù)現(xiàn)有研究表明,型鋼混凝土(SRC)結(jié)構(gòu)承載能力高、剛性大,具有良好的延性和耗能性,將其應用于閘墩中能較好的滿足大推力情況下閘墩可靠運行的要求。但目前國內(nèi)外對于型鋼混凝土閘墩的研究較少,并且這些研究都避開了型鋼混凝土粘結(jié)滑移問題,而型鋼混凝土結(jié)構(gòu)中型鋼與混凝土協(xié)同工作的基礎(chǔ)就是型鋼與混凝土之間的自然粘結(jié),靠這種粘結(jié)作用才能夠發(fā)揮出型鋼混凝土結(jié)構(gòu)的優(yōu)點。為揭示型鋼與混凝土間的粘結(jié)滑移特性對閘墩工作性能的影響,本文在現(xiàn)有研究成果基礎(chǔ)之上,結(jié)合擬建工程,在數(shù)值分析中引入彈簧單元分析了型鋼混凝土粘結(jié)特性對閘墩工作性能的影響,進一步完善了型鋼混凝土閘墩的研究。本文利用ANSYS有限元軟件進行數(shù)值模擬分析,分別從型鋼與混凝土間的粘結(jié)滑移、閘墩的位移、應力及裂縫等方面,分析了型鋼混凝土粘結(jié)特性對閘墩工作性能的影響,在此基礎(chǔ)上進一步探討了不同保護層厚度和不同型鋼埋置長度對型鋼混凝土粘結(jié)性能和閘墩工作性能的影響。研究分析表明：(1)相對于房屋結(jié)構(gòu)中的型鋼混凝土梁和柱,型鋼混凝土閘墩的型鋼與混凝土發(fā)生粘結(jié)滑移的時機更早,初始滑移荷載為其極限荷載的50%-65%。(2)隨著荷載的增加,沿型鋼埋置長度方向,牛腿處的型鋼混凝土粘結(jié)滑移呈現(xiàn)出類似對數(shù)分布的分布趨勢,而墩體內(nèi)的型鋼混凝土粘結(jié)滑移則呈現(xiàn)出類似指數(shù)分布的分布趨勢。(3)型鋼混凝土的粘結(jié)特性對閘墩的整體位移沒有太大影響,但對局部位移影響較大。(4)型鋼混凝土的粘結(jié)性能開始先隨保護層厚度和型鋼埋置長度的增加而提升,當保護層厚度和型鋼埋置長度增加到一定值時,型鋼混凝土的粘結(jié)性能將不再提升,趨于平穩(wěn)。(5)型鋼混凝土出現(xiàn)粘結(jié)滑移前,閘墩工作性能幾乎不受型鋼保護層厚度和型鋼埋置長度的影響；型鋼混凝土出現(xiàn)粘結(jié)滑移后,保護層厚度、型鋼埋置長度對閘墩工作性能的影響較大,并且兩者的影響有所差異。(6)保護層厚度對閘墩各階段的裂縫發(fā)展趨勢的影響不明顯,但是對各裂縫階段的開裂荷載有著很大影響；型鋼埋置長度對閘墩各階段的開裂荷載無明顯影響,但相同荷載下,閘墩裂縫分布范圍則隨型鋼埋置長度的增加而減小。
[Abstract]:The pier is the main component of the drainage structure in the water conservancy project. It is one of the key buildings to bear the force of the gate and ensure the normal operation of the drainage structure. With the development of water conservancy and hydropower industry, the working head of the sluice gate of the drainage structure is increasing, and the acting force of the pier is increasing, so it is increasingly difficult for the conventional reinforced concrete pier to meet the requirements of safe and effective operation. Therefore, it is necessary to seek a new type of pier structure to ensure the reliable operation of the pier under the action of large thrust. According to the existing research, the steel reinforced concrete (SRC) (SRC) structure has high bearing capacity, high rigidity, good ductility and energy dissipation, and its application in the pier can better meet the requirements of reliable operation of the pier under the condition of large thrust. However, there are few researches on SRC pier at home and abroad, and these researches have avoided the problem of SRC bond-slip. The natural bond between SRC and SRC is the foundation of SRC working together, and the advantages of SRC can be brought into play by this kind of bond. In order to reveal the influence of the bond-slip characteristics between steel and concrete on the piers' working performance, this paper combines the existing research results with the proposed project. In the numerical analysis, spring element is introduced to analyze the influence of the bond characteristics of SRC on the working performance of the pier, and the research of SRC pier is further improved. In this paper, ANSYS finite element software is used to simulate and analyze the effect of bond characteristics of steel reinforced concrete on the working performance of pier from the aspects of bond slip between section steel and concrete, displacement of pier, stress and crack, etc. On the basis of this, the effects of different protective layer thickness and different section steel embedding length on the bond performance of steel reinforced concrete and the working performance of pier are discussed. The results show that: (1) compared with the steel reinforced concrete beams and columns in the building structure, the time of bond slip between the steel section and the concrete of the steel reinforced concrete sluice pier is earlier than that of the steel reinforced concrete beam and column in the building structure. The initial slip load is between 50 and 65 of its ultimate load. (2) with the increase of load, along with the length of section steel embedded, the bond-slip of steel reinforced concrete at the corbel shows a similar logarithmic distribution trend. The bond slip of SRC in the pier shows a similar exponential distribution trend. (3) the bond characteristics of SRC have no great effect on the overall displacement of the pier. However, the local displacement is greatly affected. (4) the bond performance of SRC begins to increase with the increase of cover thickness and section steel embedding length, and when the cover thickness and section steel buried length increase to a certain value, The bond behavior of SRC will no longer be improved and tends to be stable. (5) before the SRC appears bond-slip, the working performance of the pier is almost independent of the thickness of the steel cover and the embedded length of the section steel; After bond slip occurs in SRC, the thickness of the protective layer and the embedded length of the section steel have a great influence on the working performance of the pier. And the influence of the two is different. (6) the thickness of protective layer has no obvious influence on the development trend of cracks in each stage of pier, but has a great influence on the cracking load of each stage of crack; The length of section steel buried has no obvious influence on the cracking load of pier at each stage, but the crack distribution range of pier decreases with the length of section steel buried under the same load.
【學位授予單位】：廣西大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：TV662.2

【參考文獻】

相關(guān)期刊論文 前10條

1 陳宗平;周文祥;徐金俊;;高溫后型鋼高強混凝土界面黏結(jié)滑移性能試驗研究[J];建筑結(jié)構(gòu)學報;2015年12期

2 李俊華;邱棟梁;俞凱;王國鋒;;高溫下型鋼混凝土黏結(jié)滑移性能研究[J];應用基礎(chǔ)與工程科學學報;2015年05期

3 陳宗平;徐金俊;鄭華海;;鋼-再生混凝土界面黏結(jié)機制及強度計算方法[J];應用基礎(chǔ)與工程科學學報;2014年02期

4 陳宗平;陳宇良;鄭華海;薛建陽;;型鋼-再生混凝土界面黏結(jié)強度及其影響因素分析[J];工業(yè)建筑;2013年09期

5 陳宗平;鄭華海;薛建陽;蘇益聲;;型鋼再生混凝土黏結(jié)滑移推出試驗及黏結(jié)強度分析[J];建筑結(jié)構(gòu)學報;2013年05期

6 劉祖強;薛建陽;倪茂明;周鵬;趙鴻鐵;;實腹式型鋼混凝土異形柱邊框架擬靜力試驗及有限元分析[J];建筑結(jié)構(gòu)學報;2012年08期

7 趙鴻鐵;張風亮;薛建陽;馬輝;張錫成;;古建筑木結(jié)構(gòu)屋蓋振動臺試驗及數(shù)值模擬[J];工業(yè)建筑;2011年08期

8 趙鴻鐵;武啟明;薛建陽;劉義;;型鋼混凝土異形柱框架角節(jié)點的承載力及其有限元分析[J];西安建筑科技大學學報(自然科學版);2011年01期

9 趙鴻鐵;張海彥;薛建陽;隋煈;吳磊;;古建筑木結(jié)構(gòu)燕尾榫節(jié)點剛度分析[J];西安建筑科技大學學報(自然科學版);2009年04期

10 薛建陽;趙鴻鐵;楊勇;李俊華;王彥宏;;型鋼混凝土柱粘結(jié)滑移性能及ANSYS數(shù)值模擬方法研究[J];建筑鋼結(jié)構(gòu)進展;2006年05期

相關(guān)會議論文 前2條

1 熊祝華;;金屬材料屈服條件綜述[A];第三屆全國結(jié)構(gòu)工程學術(shù)會議論文集（上）[C];1994年

2 龔堯南;;非線性有限元法的發(fā)展及其應用[A];土木工程中計算機應用文集——中國土木工程學會計算機應用學會成立大會暨第一次學術(shù)交流會論文集[C];1981年

相關(guān)博士學位論文 前2條

1 司建輝;新型預應力閘墩體形優(yōu)化研究[D];西安理工大學;2009年

2 董宇光;型鋼與混凝土粘結(jié)—滑移關(guān)系及型鋼混凝土剪力墻抗震性能研究[D];同濟大學;2006年

相關(guān)碩士學位論文 前8條

1 曾慶福;保護層厚度對H型鋼混凝土閘墩承載能力的影響研究[D];廣西大學;2014年

2 袁春;型鋼截面形式對型鋼混凝土閘墩承載能力的影響研究[D];廣西大學;2014年

3 王藝;任意平面/曲面域上的高質(zhì)量三角化網(wǎng)格生成[D];湘潭大學;2012年

4 柏文;型鋼混凝土錨體弧門支座預應力閘墩研究[D];山東大學;2010年

5 張亞;T型鋼與混凝土粘結(jié)滑移性能的理論分析及ANSYS程序驗證[D];長安大學;2009年

6 蒲錳;空腔結(jié)構(gòu)頸縮式預應力閘墩體型優(yōu)化分析[D];西安理工大學;2009年

7 胡小會;型鋼混凝土界面滑移及本構(gòu)關(guān)系研究[D];河南科技大學;2008年

8 鄧國專;型鋼混凝土結(jié)構(gòu)粘結(jié)滑移性能試驗研究與基本理論分析[D];西安建筑科技大學;2005年

，

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