- 摘 要
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（1 同濟大學(xué)預(yù)應(yīng)力研究所， 上海 200092； 2 同濟大學(xué)先進土木工程材料教育部重點實驗室， 上海 200092；3 浙江大學(xué)建筑設(shè)計研究院有限公司， 杭州 310028; 4 上海建工集團股份有限公司， 上海 200080）
［摘要］以國家會展中心為背景，對其工程用泵送混凝土進行了恒溫恒濕條件下的收縮徐變試驗，運用MIDAS/Gen軟件對其進行了施工過程分析，考察收縮徐變對其大跨預(yù)應(yīng)力梁長期撓度的影響，并和實測結(jié)果進行了比較。結(jié)果表明：國內(nèi)外常用收縮徐變模型均低估了本試驗泵送混凝土的收縮徐變；根據(jù)試驗數(shù)據(jù)修正得到的預(yù)測模型大幅提高了其預(yù)測精度；要正確分析收縮徐變對混凝土結(jié)構(gòu)的影響，選擇合適的收縮徐變模型非常重要，在設(shè)計和分析時要合理選擇，有條件時可采用實測數(shù)據(jù)來進行修正。
［關(guān)鍵詞］國家會展中心；泵送混凝土； 收縮； 徐變； 施工過程分析
中圖分類號：TU375文獻標(biāo)識碼：A文章編號：1002-848X(2018)08-0070-07
Analysis on shrinkage and creep effects of pumping concrete of National Exhibition and Convention Center
Xiong Xueyu1,2, Wang Lijun1,3, Wang Meihua4
(1 Institute of Prestressed Structures, Tongji University, Shanghai 200092， China; 2 Key Laboratory of Advanced Civil Engineering Materials (Tongji University), Ministry of Education, Shanghai 200092, China; 3 The Architectural Design & Research Institute of Zhejiang University Co., Ltd., Hangzhou 310028, China;4 Shanghai Construction Group Co．， Shanghai 200080， China)
Abstract:An experimental study on the shrinkage and creep effects of pumping concrete used in National Exhibition and Convention Center (NECC) was carried out under the condition of constant temperature and humidity. The construction process analysis was conducted on NECC using MIDAS/Gen software to investigate effects of shrinkage and creep on long-term deflection of large-span prestressed beam, and results were compared with field measurements.The results show that commonly used models at home and abroad underestimate the shrinkage and creep compliance of pumming concrete in this experiment. The prediction accuracy of prediction model can be greatly improved based on experimental data correction. To correctly analyze the influence of shrinkage and creep on concrete structure, it is very important to choose the proper model of shrinkage and creep, and field measurement data can be reasonably chosen in design and analysis for correction.
Keywords:National Exhibition and Convention Center; pumping concrete; shrinkage; creep; construction process analysis
*上海市科學(xué)技術(shù)委員會科研計劃（13231200903）。
作者簡介：熊學(xué)玉，博士，教授，博士生導(dǎo)師，Email：xueyu@#edu.cn。
