基于B3模型的巨型竖向构件收缩徐变分析
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赵 昕1，鄢兴祥2，孙华华1,2，丁洁民1
(1 同济大学建筑设计研究院，上海200092; 2 同济大学建筑工程系，上海200092)[摘要] 对于超高层建筑结构的竖向构件进行收缩徐变分析已经成为超高层建筑结构设计中的重要内容。由于超高层建筑巨型竖向构件通常尺度较大，传统的收缩徐变模型大多基于尺度较小的构件试验，无法正确地反映大体表比构件收缩徐变的影响。在目前已有的收缩徐变模型中，只有B3模型正确地反映了湿度扩散的尺度效应。基于B3模型对典型超高层建筑的巨型竖向构件进行收缩和徐变分析，获得了有益的结论，可供超高层建筑结构设计参考。
[关键词] 收缩徐变；B3模型；巨型构件；大体表比Shrinkage and Creep Analysis of Mega Vertical Members Based on Model B3
Zhao Xin1, Yan Xingxiang2, Sun Huahua 1,2, Ding Jieming1
(1 The Architectural Design & Research Institute of Tongji University, Shanghai 200092, China; 2 Department of Building Engineering of Tongji University, Shanghai 200092, China)Abstract: Due to the accumulative nature, the influences of the shrinkage and creep are significant and should be taken good care of in the structural design of tall buildings. Due to the large scale of the mega vertical members of the tall buildings, the traditional shrinkage and creep models, which are mostly based on test results of small scale members, can hardly reflect the shrinkage and creep behavior of the mega vertical members. Among the current models, Model B3 is based on the correct scaling of moisture diffusion and thus can give correct prediction of the shrinkage and creep behavior of the mage vertical members. The shrinkage and creep behavior of the mage vertical members are studied based on model B3. Some beneficial conclusions are obtained and could be used as reference during the structural design of mega vertical members.
Keywords: shrinkage and creep; model B3; mega vertical members; large volume to surface ratio
