基于B3模型的巨型豎向構(gòu)件收縮徐變分析
趙 昕1，鄢興祥2，孫華華1,2，丁潔民1
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趙 昕1，鄢興祥2，孫華華1,2，丁潔民1
(1 同濟大學(xué)建筑設(shè)計研究院，上海200092; 2 同濟大學(xué)建筑工程系，上海200092)[摘要] 對于超高層建筑結(jié)構(gòu)的豎向構(gòu)件進行收縮徐變分析已經(jīng)成為超高層建筑結(jié)構(gòu)設(shè)計中的重要內(nèi)容。由于超高層建筑巨型豎向構(gòu)件通常尺度較大，傳統(tǒng)的收縮徐變模型大多基于尺度較小的構(gòu)件試驗，無法正確地反映大體表比構(gòu)件收縮徐變的影響。在目前已有的收縮徐變模型中，只有B3模型正確地反映了濕度擴散的尺度效應(yīng)?；贐3模型對典型超高層建筑的巨型豎向構(gòu)件進行收縮和徐變分析，獲得了有益的結(jié)論，可供超高層建筑結(jié)構(gòu)設(shè)計參考。
[關(guān)鍵詞] 收縮徐變；B3模型；巨型構(gòu)件；大體表比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
