內(nèi)埋型鋼巨型組合柱的濕度擴散分析
嚴(yán)從志1 ，趙 昕 2
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(1 同濟大學(xué)建筑工程系，上海 200092；2 同濟大學(xué)建筑設(shè)計研究(集團)有限公司，上海 200092)[摘要] 內(nèi)埋型鋼巨型組合柱在現(xiàn)代超高層建筑結(jié)構(gòu)體系中得到廣泛應(yīng)用。內(nèi)埋型鋼巨型組合柱混凝土累積的收縮徐變產(chǎn)生的豎向長期變形[1]對于結(jié)構(gòu)豎向荷載的重新分配以及水平構(gòu)件的應(yīng)力水平有著重要影響。內(nèi)埋型鋼對濕度擴散的阻礙作用，使得內(nèi)埋型鋼巨型組合柱的濕度擴散不同于普通鋼筋混凝土柱，巨型組合柱的長期豎向變形也不同于普通鋼筋混凝土柱[2]。然而，目前在實際的內(nèi)埋型鋼巨型組合柱的設(shè)計中，并沒有真正考慮型鋼對于混凝土中濕度的阻礙作用，因此用計算普通混凝土柱的收縮徐變計算模型計算，過高的估計了內(nèi)埋型鋼巨型組合柱的收縮徐變值。本文對構(gòu)件的濕度擴散進行了分析，并對內(nèi)埋型鋼巨型組合柱和普通混凝土柱濕度擴散進行了對比研究。[關(guān)鍵詞] 內(nèi)埋型鋼巨型組合柱;長期變形;濕度擴散中途分類號：TU398 文獻標(biāo)識碼：A 文章編號：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作者簡介：嚴(yán)從志，在讀碩士，Email:tumu2008323@163.com。
