（1 同济大学预应力研究所， 上海 200092；  2 同济大学先进土木工程材料教育部重点实验室， 上海 200092；3 浙江大学建筑设计研究院有限公司， 杭州 310028; 4 上海建工集团股份有限公司， 上海 200080）

［摘要］以国家会展中心为背景，对其工程用泵送混凝土进行了恒温恒湿条件下的收缩徐变试验，运用MIDAS/Gen软件对其进行了施工过程分析，考察收缩徐变对其大跨预应力梁长期挠度的影响，并和实测结果进行了比较。结果表明：国内外常用收缩徐变模型均低估了本试验泵送混凝土的收缩徐变；根据试验数据修正得到的预测模型大幅提高了其预测精度；要正确分析收缩徐变对混凝土结构的影响，选择合适的收缩徐变模型非常重要，在设计和分析时要合理选择，有条件时可采用实测数据来进行修正。

［关键词］国家会展中心；泵送混凝土； 收缩； 徐变；  施工过程分析

中图分类号：TU375文献标识码：A文章编号：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

*上海市科学技术委员会科研计划（13231200903）。

作者简介：熊学玉，博士，教授，博士生导师，Email：xueyu@tongji.edu.cn。