【摘要】：因?yàn)槌邔咏ㄖ慕Y(jié)構(gòu)形式獨(dú)特,結(jié)構(gòu)設(shè)計(jì)難度大以及施工過(guò)程的復(fù)雜性等特點(diǎn),使得超高層建筑在整個(gè)建設(shè)過(guò)程中面臨著巨大的挑戰(zhàn)。施工過(guò)程中結(jié)構(gòu)整體剛度、荷載和應(yīng)力都在不斷發(fā)生變化,結(jié)構(gòu)內(nèi)部受力復(fù)雜;在使用階段,結(jié)構(gòu)在遭受外力作用如臺(tái)風(fēng)和地震作用時(shí)會(huì)產(chǎn)生一定的損傷,造成結(jié)構(gòu)強(qiáng)度降低,帶來(lái)一定的安全隱患,施工期間和使用階段結(jié)構(gòu)的安全性越來(lái)越受到關(guān)注。運(yùn)用數(shù)值模擬和結(jié)構(gòu)健康監(jiān)測(cè)兩者相結(jié)合的方法對(duì)超高層建筑施工全過(guò)程中結(jié)構(gòu)的變形和受力狀態(tài)進(jìn)行監(jiān)測(cè)和評(píng)估,優(yōu)化施工方案并確保施工安全有序進(jìn)行,具有重要的意義。本文首先介紹了超高層建筑結(jié)構(gòu)健康監(jiān)測(cè)系統(tǒng)和研究現(xiàn)狀。然后利用深圳平安金融中心的結(jié)構(gòu)健康監(jiān)測(cè)平臺(tái),對(duì)塔樓的關(guān)鍵構(gòu)件進(jìn)行了施工階段全過(guò)程模擬分析,并將實(shí)測(cè)數(shù)據(jù)與模擬進(jìn)行對(duì)比,主要內(nèi)容如下:對(duì)平安金融中心進(jìn)行豎向變形模擬分析,探討施工期間和使用階段長(zhǎng)期荷載效應(yīng)下核心筒和巨柱的累積豎向變形發(fā)展規(guī)律,并研究是否考慮收縮徐變、考慮施工過(guò)程等對(duì)結(jié)構(gòu)豎向變形的影響。分析結(jié)果說(shuō)明不考慮收縮徐變和一次性加載的模擬將嚴(yán)重低估豎向變形結(jié)果,超高層建筑在施工過(guò)程分析應(yīng)注意考慮收縮徐變和施工過(guò)程對(duì)豎向變形的影響。研究了平安金融中心的核心筒型鋼柱、核心筒剪力墻和巨柱以及帶狀桁架和伸臂桁架桿件在施工階段的內(nèi)力和應(yīng)力變化情況,并分析了收縮徐變對(duì)構(gòu)件應(yīng)力的影響。結(jié)果表明,收縮徐變對(duì)鋼結(jié)構(gòu)的應(yīng)力變化影響相對(duì)較大,不可忽略其影響,設(shè)計(jì)中應(yīng)予以考慮;桁架構(gòu)件中的弦桿在施工過(guò)程中受力變化較穩(wěn)定,腹桿受力變化較大,且受收縮徐變影響也較大。結(jié)合現(xiàn)場(chǎng)實(shí)測(cè)數(shù)據(jù)和有限元模擬數(shù)據(jù)進(jìn)行對(duì)比分析,核心筒和巨柱的豎向變形和應(yīng)力數(shù)據(jù)對(duì)比結(jié)果較為吻合,而桁架鋼結(jié)構(gòu)受溫度影響大,部分?jǐn)?shù)據(jù)對(duì)比結(jié)果相差較大。主要由于有限元模擬與現(xiàn)場(chǎng)實(shí)際施工環(huán)境狀況存在一定差別,并且數(shù)據(jù)采集時(shí)容易受到環(huán)境因素的干擾而導(dǎo)致部分?jǐn)?shù)據(jù)不準(zhǔn)確�？偟膩�(lái)說(shuō),本文提出的數(shù)值模型可以提供和現(xiàn)場(chǎng)實(shí)測(cè)一致的結(jié)果,對(duì)施工過(guò)程優(yōu)化和結(jié)構(gòu)安全都具有重要的意義。
[Abstract]:Because of the unique structural form, the difficulty of structural design and the complexity of the construction process, the super-high-rise building faces great challenges in the whole construction process. During the construction process, the overall stiffness, load and stress of the structure are constantly changing, and the internal stress of the structure is complicated. In the use stage, when the structure is subjected to external forces such as typhoon and earthquake, it will cause certain damage, reduce the strength of the structure and bring a certain hidden danger of safety. The safety of the structure during construction and service period has been paid more and more attention. It is of great significance to monitor and evaluate the deformation and stress state of the structure in the whole process of super-high-rise building construction by means of the combination of numerical simulation and structural health monitoring, in order to optimize the construction scheme and ensure the safe and orderly construction of the super-high-rise building. This paper first introduces the super-high-rise building structural health monitoring system and research status. Then the structural health monitoring platform of Shenzhen Ping'an Financial Center is used to simulate and analyze the whole process of the key components of the tower during the construction phase, and the measured data are compared with the simulation. The main contents are as follows: the vertical deformation of Ping an Financial Center is simulated and analyzed, the accumulative vertical deformation law of core tube and giant column under long-term load effect during construction and service period is discussed, and whether shrinkage and creep is considered is studied. The influence of the construction process on the vertical deformation of the structure is considered. The analysis results show that the vertical deformation results will be seriously underestimated without consideration of shrinkage creep and one-time loading. In the construction process analysis of super-high-rise buildings the effects of shrinkage and creep and construction process on vertical deformation should be taken into account. In this paper, the internal force and stress changes of core tube steel columns, core tube shear walls and giant columns, strip trusses and extended arm trusses in the construction stage of Ping an Financial Center are studied, and the influence of shrinkage and creep on the stress of the components is analyzed. The results show that the influence of shrinkage and creep on the stress change of steel structure is relatively large and should not be ignored, which should be considered in the design. In the course of construction, the chords in truss members have a stable change in stress, a great change in force on the web, and a great influence on the shrinkage and creep of the web members. Compared with the field measured data and finite element simulation data, the comparison results of vertical deformation and stress between core cylinder and giant column are more consistent, while the truss steel structure is greatly affected by temperature, and some of the data are different from each other. There are some differences between the finite element simulation and the actual construction environment, and the data collection is easily interfered by the environmental factors, which leads to the inaccuracy of some data. In general, the numerical model presented in this paper can provide the same results as in-situ measurements, which is of great significance to the optimization of construction process and the safety of structures.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TU974

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 盧澤龍;;超高層建筑之施工難點(diǎn)分析[J];城市建筑;2014年06期

2 胡笳;李晗;楊暉柱;張其林;;上海中心大廈結(jié)構(gòu)健康監(jiān)測(cè)軟件集成設(shè)計(jì)及應(yīng)用[J];同濟(jì)大學(xué)學(xué)報(bào)(自然科學(xué)版);2014年03期

3 李亞明;張暉;郝安民;;超高層建筑筒中筒結(jié)構(gòu)體系之探討[J];結(jié)構(gòu)工程師;2013年06期

4 張其林;呂佳;李晗;趙昕;陳魯;;上海中心大廈施工過(guò)程數(shù)值分析與監(jiān)測(cè)研究[J];施工技術(shù);2013年15期

5 黃湘湘;周緒紅;;混凝土收縮徐變的長(zhǎng)期效應(yīng)對(duì)混合體系豎向變形差的影響[J];湖南大學(xué)學(xué)報(bào)(自然科學(xué)版);2013年05期

6 任瑞;劉冰;;超高層混合結(jié)構(gòu)考慮施工過(guò)程的豎向變形差異計(jì)算和分析[J];結(jié)構(gòu)工程師;2013年02期

7 王化杰;范峰;支旭東;黃剛;祝恩淳;王宏;;超高層結(jié)構(gòu)施工豎向變形規(guī)律及預(yù)變形控制研究[J];工程力學(xué);2013年02期

8 王宏;劉曙;陸建新;劉曉斌;許航;廖彪;;深圳京基100無(wú)線(xiàn)監(jiān)測(cè)數(shù)據(jù)分析[J];施工技術(shù);2012年18期

9 占毅;楊學(xué)林;李曉良;周平槐;;蘭州紅樓時(shí)代廣場(chǎng)施工模擬與混凝土收縮和徐變效應(yīng)分析[J];建筑結(jié)構(gòu);2012年08期

10 李燁;王建;周建龍;;超高層建筑施工模擬分析的非荷載效應(yīng)應(yīng)用研究[J];建筑結(jié)構(gòu);2012年05期

相關(guān)博士學(xué)位論文 前1條

1 黃湘湘;鋼框架－鋼筋混凝土核心筒體系考慮混凝土收縮徐變的豎向變形差研究[D];湖南大學(xué);2009年

相關(guān)碩士學(xué)位論文 前4條

1 江世杰;超高層混合結(jié)構(gòu)堅(jiān)向變形差對(duì)結(jié)構(gòu)的影響及控制措施[D];武漢理工大學(xué);2013年

2 侯攀;自錨式懸索橋健康監(jiān)測(cè)系統(tǒng)監(jiān)測(cè)信息處理與狀態(tài)評(píng)估研究[D];長(zhǎng)沙理工大學(xué);2012年

3 邱英亮;超高建筑結(jié)構(gòu)施工模擬分析及施工方案的長(zhǎng)期效應(yīng)研究[D];哈爾濱工業(yè)大學(xué);2011年

4 陳元鵬;土木工程結(jié)構(gòu)實(shí)時(shí)動(dòng)態(tài)監(jiān)測(cè)系統(tǒng)的設(shè)計(jì)與應(yīng)用[D];蘭州理工大學(xué);2011年

，

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