内埋型钢巨型组合柱的湿度扩散分析
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(1 同济大学建筑工程系，上海 200092；2 同济大学建筑设计研究(集团)有限公司，上海 200092)[摘要] 内埋型钢巨型组合柱在现代超高层建筑结构体系中得到广泛应用。内埋型钢巨型组合柱混凝土累积的收缩徐变产生的竖向长期变形[1]对于结构竖向荷载的重新分配以及水平构件的应力水平有着重要影响。内埋型钢对湿度扩散的阻碍作用，使得内埋型钢巨型组合柱的湿度扩散不同于普通钢筋混凝土柱，巨型组合柱的长期竖向变形也不同于普通钢筋混凝土柱[2]。然而，目前在实际的内埋型钢巨型组合柱的设计中，并没有真正考虑型钢对于混凝土中湿度的阻碍作用，因此用计算普通混凝土柱的收缩徐变计算模型计算，过高的估计了内埋型钢巨型组合柱的收缩徐变值。本文对构件的湿度扩散进行了分析，并对内埋型钢巨型组合柱和普通混凝土柱湿度扩散进行了对比研究。[关键词] 内埋型钢巨型组合柱;长期变形;湿度扩散中途分类号：TU398 文献标识码：A 文章编号：1002-848X(2013)S1-0467-06Differential moisture distribution analysis of mega SRC columnsYan Congzhi 1, Zhao Xin 2(1 Department of Building Engineering, Tongji University, Shanghai 210096, China; 2 Tongji Architectural Design (Group) Co., Ltd.,Abstract : Mega SRC columns with complex embedded steels become widely applied in the structural system of contemporary super-tall buildings. The long-term vertical deformation of mega SRC columns due to cumulative creep and shrinkage strains has significant impact on the vertical load redistribution and stress level of critical horizontal structural members. The differential moisture distribution of mega SRC columns is quite different from that of ordinary RC columns due to the presence of complex embedded steels, and thus the long-term deformation of mega SRC columns is quite different from that of ordinary RC columns. However, the interference effects from the presence of complex embedded steels are actually not considered in current design practice of mega SRC columns, and thus overestimate the drying shrinkage and drying creep of mega SRC columns in comparison with ordinary RC columns. Moisture distribution analysis and contrast of mega SRC columns and ordinary RC columns are applied in this study to investigate the difference of moisture distribution between mega SRC columns and ordinary RC columns.Keywords : mega SRC columns;long term deformations;moisture distribution作者简介：严从志，在读硕士，Email:tumu2008323@163.com。
