本文選題：預應力側向約束　切入點：變形協(xié)調　出處：《哈爾濱工程大學》2014年碩士論文

【摘要】：預應力技術廣泛應用于大跨度超靜定混凝土結構中。張拉預應力筋時,由于超靜定結構中柱、墻等豎向構件具有較大的抗側剛度,會對水平構件產生側向約束。若不考慮側向約束的影響,會使水平構件承載力的理論分析值大于實際值,從而帶來安全隱患。因此對預應力混凝土超靜定結構的側向約束分析具有重要的理論意義和應用價值。本文首先對超靜定混凝土結構的預應力效應進行分析,并依據(jù)新規(guī)范給出計算預應力損失的程序框圖;其次通過兩種方法推導超靜定結構側向約束的計算公式:一是不考慮轉角,依據(jù)變形協(xié)調條件;二是忽略軸向變形,考慮柱端轉角,利用矩陣位移法及D值法的相關知識,分別推導了單層單跨結構、單層雙跨結構和單跨雙層結構的側向約束影響系數(shù):最后通過SAP2000有限元軟件對列舉的工程實例及框架梁側向約束影響因素進行模擬分析,得到以下結論:1.從對工程實例中框架梁側向約束的數(shù)值模擬結果可知,有限元數(shù)值分析結果與理論計算結果相差不大,與變形協(xié)調法推導的理論值更為接近,說明在分析超靜定結構側向約束影響時,由于柱端轉角很小,可以忽略其影響進行計算。2.從側向約束影響因素的數(shù)值模擬結果可知,隨著梁柱線剛度比的逐漸減小、框架結構跨數(shù)的逐漸增加、預應力筋偏心距的逐漸減小,框架梁的側向約束損失值逐漸增大,而預加力對側向約束損失的影響很小,同時預應力筋的張拉施工方案對側向約束損失也有一定影響。3.通過有限元分析,提出從增大梁柱線剛度比、減小框架結構的跨數(shù)、合理選擇預應力筋施工張拉順序和通過構造措施四個方面減少超靜定結構的側向約束損失。
[Abstract]:Pre-stress technology is widely used in long-span statically indeterminate concrete structures. When tensioning prestressed tendons, vertical members such as walls have larger lateral stiffness due to columns in statically indeterminate structures. If the influence of lateral constraint is not taken into account, the theoretical analysis value of the horizontal member bearing capacity will be greater than the actual value. Therefore, the lateral constraint analysis of prestressed concrete statically indeterminate structure has important theoretical significance and application value. In this paper, the prestress effect of statically indeterminate concrete structure is analyzed. According to the new code, the program block diagram for calculating the loss of prestress is given. Secondly, the formula of lateral constraint of statically indeterminate structure is deduced by two methods: one is not considering rotation angle, the other is neglecting the axial deformation. Considering the angle of column tip, using the knowledge of matrix displacement method and D value method, the single-story single-span structure is derived respectively. The influence coefficient of lateral constraint of single-story double-span structure and single-span double-layer structure is analyzed. Finally, the engineering examples and the factors affecting the lateral constraint of frame beam are simulated and analyzed by SAP2000 finite element software. The following conclusions are obtained: 1. From the numerical simulation results of the lateral constraints of frame beams in engineering examples, it can be seen that the results of finite element numerical analysis are not different from the results of theoretical calculation, and are closer to the theoretical values derived by the deformation coordination method. The results show that in the analysis of lateral constraints of statically indeterminate structures, due to the small corner of column tip, the influence of column end can be ignored. 2. From the numerical simulation results of the influence factors of lateral constraint, it can be seen that the linear stiffness ratio of Liang Zhu decreases gradually. With the increase of span and the decrease of eccentricity of prestressed tendons, the value of lateral constraint loss of frame beam increases gradually, but the influence of prestress on lateral constraint loss is very small. At the same time, the tensioning construction scheme of prestressed tendons also has a certain influence on the lateral constraint loss. 3. Through the finite element analysis, it is proposed to reduce the span number of frame structure by increasing Liang Zhu's linear stiffness ratio. Reasonable selection of prestressing tendons construction tension sequence and construction measures to reduce the loss of lateral constraints of statically indeterminate structure.
【學位授予單位】：哈爾濱工程大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU378

【參考文獻】

相關期刊論文 前10條

1 周安;郝成義;賈莉莉;;框架抗側剛度對后張預應力效應影響分析[J];合肥工業(yè)大學學報(自然科學版);2008年08期

2 周威;鄭文忠;;多高層預應力混凝土框架結構側限影響分析[J];哈爾濱工業(yè)大學學報;2007年10期

3 周威;鄭文忠;;單層多跨預應力混凝土框架側限影響計算方法[J];哈爾濱工業(yè)大學學報;2007年02期

4 潘立;后張預應力混凝土結構中預應力約束損失的計算分析[J];建筑科學;2004年06期

5 鄧志恒,唐光暹,潘峰,陶曉光;預應力框架在不同的施工方案下考慮施工過程的分析[J];廣西大學學報(自然科學版);2004年02期

6 李磊,莊光友;預應力混凝土結構次內力計算方法[J];山東建筑工程學院學報;2004年01期

7 陳樹華,欒偉偉;側向柱對預應力框架影響的等效彈簧模型[J];哈爾濱工程大學學報;2003年06期

8 鄭文忠,周威;預應力混凝土結構側向約束影響的分析方法[J];哈爾濱建筑大學學報;2001年06期

9 薛偉辰;預應力次彎矩的設計研究[J];同濟大學學報(自然科學版);2001年06期

10 張德峰,呂志濤;側向約束對預應力混凝土框架壓力的影響[J];建筑結構;2001年05期

相關碩士學位論文 前4條

1 陳傳鼎;預應力混凝土框架梁側向約束影響的研究[D];合肥工業(yè)大學;2008年

2 張彩紅;考慮約束影響的預應力結構設計理論及方法研究[D];同濟大學;2007年

3 董杰;預應力混凝土結構約束影響的研究[D];浙江大學;2006年

4 周定松;后張預應力混凝土框架梁受力分析及設計方法的研究[D];西安建筑科技大學;2001年

，

本文編號：1677394