發(fā)布時(shí)間：2018-05-14 17:54

  本文選題：高層建筑 + 豎向變形差�。� 參考：《青島理工大學(xué)》2016年碩士論文

【摘要】：隨著社會(huì)和經(jīng)濟(jì)的發(fā)展,超高層建筑的數(shù)量與日俱增。但是伴隨著超高層建筑高度的增高、施工周期的延長(zhǎng),框架柱與核心筒之間的豎向變形差也越來(lái)越大,其對(duì)建筑正常使用的影響逐漸受到土木領(lǐng)域的重視。自二十世紀(jì)60年代以來(lái),國(guó)內(nèi)外學(xué)者先后通過(guò)現(xiàn)場(chǎng)觀測(cè)豎向變形、推導(dǎo)豎向變形差公式以及有限元模擬分析等方法對(duì)超高層建筑的豎向變形差進(jìn)行研究。目前,土木工程領(lǐng)域?qū)ωQ向變形差的研究主要集中于是否考慮施工過(guò)程以及收縮徐變等影響因素上,對(duì)超高層建筑的結(jié)構(gòu)設(shè)計(jì)和施工方式有重要的意義。本文采用有限元軟件MIDAS GEN對(duì)某復(fù)雜超高層建筑進(jìn)行建模分析,針對(duì)不同加載方式和混凝土收縮徐變對(duì)豎向變形差的影響展開研究,主要的研究工作和研究成果如下:(1)模擬分析超高層建筑在“一次性加載”和模擬施工加載條件下框架柱與核心筒的豎向變形,分析不同加載方式對(duì)豎向變形差的影響。結(jié)果表明:兩種加載方式下的豎向變形在延高度方向上的分布規(guī)律是不同的,在“一次性加載”條件下豎向構(gòu)件的變形由底層向上逐漸增大,在最頂層豎向變形值取最大值;而在模擬施工加載方式下豎向構(gòu)件的變形值則是從底層向上先增大后變小,在中間層取得最大豎向變形值;在“一次性加載”條件下框架柱之間以及剪力墻之間的豎向變形差別較大,而在模擬施工條件下框架柱之間以及剪力墻之間的豎向變形則相對(duì)差別較小;在不同加載方式下框架柱與核心筒之間的豎向變形差發(fā)展趨勢(shì)與相應(yīng)加載方式下構(gòu)件豎向變形的發(fā)展趨勢(shì)類似,即“一次性加載”方式下從下到上逐漸增大,模擬施工加載方式下由下到上的發(fā)展趨勢(shì)為先增大后減小,成魚肚狀。(2)模擬分析是否考慮混凝土收縮徐變特性時(shí)框架柱與核心筒的豎向變形,對(duì)是否考慮混凝土收縮徐變特性時(shí)豎向變形差的數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析。結(jié)果表明:混凝土收縮徐變效應(yīng)對(duì)超高層建筑框架柱豎向變形的影響約占其總變形量的38.7%左右,而對(duì)于核心筒豎向變形的影響約占其總變形量的43%左右,但由于框架柱的變形量遠(yuǎn)大于核心筒的變形量,所以在相同的受力條件下框架柱豎向變形變化值上要比核心筒的變化值更大;對(duì)于框架柱與核心筒之間的變形差而言,由于考慮收縮徐變時(shí)框架柱的變形增量大于核心筒的變形增量,所以混凝土的收縮徐變效應(yīng)會(huì)加大建筑的豎向變形差。(3)模擬分析超高層建筑的框架柱為鋼柱和混凝土柱時(shí)構(gòu)件的豎向變形,對(duì)豎向變形差數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析。結(jié)果表明:鋼框架柱與核心筒之間的豎向變形差僅為混凝土框架柱與核心筒豎向變形差的60%左右。由于鋼材本身幾乎沒(méi)有時(shí)間依存特性,使得鋼框架柱在使用過(guò)程中幾乎不發(fā)生收縮徐變,鋼框架柱的豎向變形小于混凝土框架柱,但兩種情況下核心筒的變形相差不大,所以選用鋼框架柱比選用混凝土框架柱時(shí)建筑的豎向變形差小。
[Abstract]:With the development of society and economy, the number of super high-rise buildings is increasing. But with the increase of the height of the super high building, the extension of the construction period, the vertical deformation difference between the frame column and the core tube is becoming more and more big, and its influence on the normal use of the building is gradually paid attention to in the field of soil and wood. Since 60s twentieth Century, At present, the study of vertical deformation difference in the field of civil engineering mainly focuses on whether to consider the influence factors such as construction pass and shrinkage creep. The structure design and construction methods of the storey building are of great significance. In this paper, the finite element software MIDAS GEN is used to model and analyze a complex super high rise building, and the effect of different loading ways and concrete shrinkage and creep on the vertical deformation difference is studied. The main research work and research results are as follows: (1) simulation and analysis of super high rise building The vertical deformation of frame column and core tube is built under the condition of "one time loading" and simulated construction loading. The effect of different loading methods on the vertical deformation difference is analyzed. The results show that the vertical deformation distribution in the direction of the two loading modes is different, and the deformation of the vertical member under the condition of "one time loading" From the bottom up, the maximum vertical deformation value is obtained at the top level, and the deformation value of the vertical member is increased from the bottom to the bottom, and the maximum vertical deformation value is obtained in the middle layer. The vertical deformation difference between the frame column and the shear wall is more different under the condition of "one time loading". The vertical deformation between the frame column and the shear wall is relatively small under the simulated construction conditions, and the vertical deformation difference between the frame column and the core tube under different loading modes is similar to the trend of the vertical deformation of the component under the corresponding loading mode, that is, the "one time loading" mode is from bottom to up. Gradually, the development trend of the simulated construction loading mode from bottom to upper is first increasing and then decreasing, and the fish belly shape. (2) whether the vertical deformation of the frame column and the core tube is considered when the concrete shrinkage and creep characteristics are considered, and the data of whether the vertical deformation difference is considered when the shrinkage and creep characteristics of concrete are taken into consideration. The effect of the shrinkage and creep effect on the vertical deformation of the frame column of the high rise building accounts for about 38.7% of the total deformation, while the effect on the vertical deformation of the core tube accounts for about 43% of the total deformation, but the deformation of the frame column is far greater than the deformation of the core cylinder, so the vertical deformation of the frame column is changed under the same stress conditions. As for the deformation difference between the frame column and the core barrel, the deformation increment of the frame column is greater than the deformation increment of the core cylinder for the shrinkage and creep, so the shrinkage and creep effect of the concrete will increase the vertical deformation difference between the frame column and the core barrel. (3) the frame column of the super high rise building is a steel column. The vertical deformation data of the vertical deformation of the concrete column and the concrete column are statistically analyzed. The results show that the vertical deformation difference between the steel frame column and the core tube is only about 60% of the vertical deformation of the concrete frame column and the core tube. Without shrinkage and creep, the vertical deformation of the steel frame column is less than that of the concrete frame column, but the deformation of the core tube is very small in the two cases, so the vertical deformation difference between the steel frame column and the concrete frame column is smaller than that of the concrete frame column.

【學(xué)位授予單位】：青島理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TU973.17

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