混凝土收縮徐變對(duì)天津津塔施工模擬及預(yù)變形的影響分析*
劉楓,劉軍進(jìn)
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劉楓,劉軍進(jìn)(中國(guó)建筑科學(xué)研究院,北京 100013)[摘要]徐變和收縮對(duì)于大體積、大跨度以及超高混凝土結(jié)構(gòu)的應(yīng)力和變形具有不可忽視的作用。對(duì)天津津塔項(xiàng)目進(jìn)行了考慮混凝土收縮徐變的施工模擬分析,給出了混凝土收縮徐變因素對(duì)結(jié)構(gòu)框架柱施工安裝預(yù)調(diào)值及構(gòu)件加工預(yù)調(diào)值的影響及其考慮方法。對(duì)于本項(xiàng)目而言,當(dāng)考慮混凝土收縮徐變影響因素后,結(jié)構(gòu)框架柱施工安裝預(yù)調(diào)值及構(gòu)件加工預(yù)調(diào)值統(tǒng)一按1.5倍“不考慮混凝土收縮徐變及不考慮地基沉降影響的預(yù)調(diào)值”采用。[關(guān)鍵詞]收縮;徐變;施工模擬;預(yù)變形中圖分類號(hào):TU973+.23文獻(xiàn)標(biāo)識(shí)碼:A文章編號(hào):1002-848X(2012)09-0142-04Effect of creep and shrinkage on construction simulation and pre-deformation analysis for Jin Tower in TianjinLiu Feng, Liu Junjin(China Academy of Building Research, Beijing 100013, China)Abstract: Concrete creep and shrinkage have innegligible effect on the stress and deformation of huge volume, large span and high-rise structure. Construction simulation considering creep and shrinkage for Jin Tower in Tianjin was carried out. The influence of concrete creep and shrinkage on the manufacture and installation preset values of the columns has been provided. The manufacture and installation preset values of the columns should be adjusted to 1.5 times the original preset values after considering the effect of concrete creep and shrinkage for this project.Keywords: shrinkage;creep;construction simulation;pre-deformation*國(guó)家科技支撐計(jì)劃資助(2006BAJ01B04)。作者簡(jiǎn)介:劉楓,碩士,副研究員,一級(jí)注冊(cè)結(jié)構(gòu)工程師,Email:liufeng@cabrtech.com。參考文獻(xiàn)[1]劉軍進(jìn), 徐自國(guó), 徐強(qiáng), 等. 天津津塔施工過(guò)程分析及預(yù)變形技術(shù)[J]. 建筑結(jié)構(gòu), 2012,42(9):137-141.[2]曾彥. 鋼管混凝土徐變研究發(fā)展概述[J]. 公路交通技術(shù), 2005,4(2):73-75.[3]CEB-FIP. CEB-FIP Model code[S]. Paris: CEB Europe International Concrete Committee, 1990.[4]郭薇薇, 王元豐, 韓冰. 鋼管混凝土大偏心受壓構(gòu)件的徐變分析[J]. 工程力學(xué), 2003,20(1):91-95.[5]鐘善桐. 鋼管混凝土結(jié)構(gòu)[M]. 北京:清華大學(xué)出版社, 2003.
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