本文選題：預(yù)應(yīng)力側(cè)向約束　切入點(diǎn)：變形協(xié)調(diào)　出處：《哈爾濱工程大學(xué)》2014年碩士論文

【摘要】：預(yù)應(yīng)力技術(shù)廣泛應(yīng)用于大跨度超靜定混凝土結(jié)構(gòu)中。張拉預(yù)應(yīng)力筋時(shí),由于超靜定結(jié)構(gòu)中柱、墻等豎向構(gòu)件具有較大的抗側(cè)剛度,會(huì)對水平構(gòu)件產(chǎn)生側(cè)向約束。若不考慮側(cè)向約束的影響,會(huì)使水平構(gòu)件承載力的理論分析值大于實(shí)際值,從而帶來安全隱患。因此對預(yù)應(yīng)力混凝土超靜定結(jié)構(gòu)的側(cè)向約束分析具有重要的理論意義和應(yīng)用價(jià)值。本文首先對超靜定混凝土結(jié)構(gòu)的預(yù)應(yīng)力效應(yīng)進(jìn)行分析,并依據(jù)新規(guī)范給出計(jì)算預(yù)應(yīng)力損失的程序框圖;其次通過兩種方法推導(dǎo)超靜定結(jié)構(gòu)側(cè)向約束的計(jì)算公式:一是不考慮轉(zhuǎn)角,依據(jù)變形協(xié)調(diào)條件;二是忽略軸向變形,考慮柱端轉(zhuǎn)角,利用矩陣位移法及D值法的相關(guān)知識(shí),分別推導(dǎo)了單層單跨結(jié)構(gòu)、單層雙跨結(jié)構(gòu)和單跨雙層結(jié)構(gòu)的側(cè)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(shí)例及框架梁側(cè)向約束影響因素進(jìn)行模擬分析,得到以下結(jié)論:1.從對工程實(shí)例中框架梁側(cè)向約束的數(shù)值模擬結(jié)果可知,有限元數(shù)值分析結(jié)果與理論計(jì)算結(jié)果相差不大,與變形協(xié)調(diào)法推導(dǎo)的理論值更為接近,說明在分析超靜定結(jié)構(gòu)側(cè)向約束影響時(shí),由于柱端轉(zhuǎn)角很小,可以忽略其影響進(jìn)行計(jì)算。2.從側(cè)向約束影響因素的數(shù)值模擬結(jié)果可知,隨著梁柱線剛度比的逐漸減小、框架結(jié)構(gòu)跨數(shù)的逐漸增加、預(yù)應(yīng)力筋偏心距的逐漸減小,框架梁的側(cè)向約束損失值逐漸增大,而預(yù)加力對側(cè)向約束損失的影響很小,同時(shí)預(yù)應(yīng)力筋的張拉施工方案對側(cè)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(jié)構(gòu)的跨數(shù)、合理選擇預(yù)應(yīng)力筋施工張拉順序和通過構(gòu)造措施四個(gè)方面減少超靜定結(jié)構(gòu)的側(cè)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(xué)位授予單位】：哈爾濱工程大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU378

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 周安;郝成義;賈莉莉;;框架抗側(cè)剛度對后張預(yù)應(yīng)力效應(yīng)影響分析[J];合肥工業(yè)大學(xué)學(xué)報(bào)(自然科學(xué)版);2008年08期

2 周威;鄭文忠;;多高層預(yù)應(yīng)力混凝土框架結(jié)構(gòu)側(cè)限影響分析[J];哈爾濱工業(yè)大學(xué)學(xué)報(bào);2007年10期

3 周威;鄭文忠;;單層多跨預(yù)應(yīng)力混凝土框架側(cè)限影響計(jì)算方法[J];哈爾濱工業(yè)大學(xué)學(xué)報(bào);2007年02期

4 潘立;后張預(yù)應(yīng)力混凝土結(jié)構(gòu)中預(yù)應(yīng)力約束損失的計(jì)算分析[J];建筑科學(xué);2004年06期

5 鄧志恒,唐光暹,潘峰,陶曉光;預(yù)應(yīng)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(xué)學(xué)報(bào)(自然科學(xué)版);2004年02期

6 李磊,莊光友;預(yù)應(yīng)力混凝土結(jié)構(gòu)次內(nèi)力計(jì)算方法[J];山東建筑工程學(xué)院學(xué)報(bào);2004年01期

7 陳樹華,欒偉偉;側(cè)向柱對預(yù)應(yīng)力框架影響的等效彈簧模型[J];哈爾濱工程大學(xué)學(xué)報(bào);2003年06期

8 鄭文忠,周威;預(yù)應(yīng)力混凝土結(jié)構(gòu)側(cè)向約束影響的分析方法[J];哈爾濱建筑大學(xué)學(xué)報(bào);2001年06期

9 薛偉辰;預(yù)應(yīng)力次彎矩的設(shè)計(jì)研究[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2001年06期

10 張德峰,呂志濤;側(cè)向約束對預(yù)應(yīng)力混凝土框架壓力的影響[J];建筑結(jié)構(gòu);2001年05期

相關(guān)碩士學(xué)位論文 前4條

1 陳傳鼎;預(yù)應(yīng)力混凝土框架梁側(cè)向約束影響的研究[D];合肥工業(yè)大學(xué);2008年

2 張彩紅;考慮約束影響的預(yù)應(yīng)力結(jié)構(gòu)設(shè)計(jì)理論及方法研究[D];同濟(jì)大學(xué);2007年

3 董杰;預(yù)應(yīng)力混凝土結(jié)構(gòu)約束影響的研究[D];浙江大學(xué);2006年

4 周定松;后張預(yù)應(yīng)力混凝土框架梁受力分析及設(shè)計(jì)方法的研究[D];西安建筑科技大學(xué);2001年

，

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