- 摘 要
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趙昕1，2，袁聚云3，4，劉射洪3，4
（1 同濟(jì)大學(xué)建筑工程系， 上海 200092； 2 同濟(jì)大學(xué)建筑設(shè)計研究院（集團(tuán)）有限公司， 上海 200092；
3 同濟(jì)大學(xué)地下建筑與工程系， 上海 200092； 4 同濟(jì)大學(xué)巖土及地下工程教育部重點實驗室， 上海 200092）
［摘要］在超高層建筑結(jié)構(gòu)與地基基礎(chǔ)共同作用過程中，材料、結(jié)構(gòu)及荷載均是時變的。結(jié)合工程實例，從地基沉降的時變性規(guī)律及上部結(jié)構(gòu)的時變性規(guī)律出發(fā)，采用以時間切片的形式考慮時變效應(yīng)的分析方法，通過PLAXIS和ETABS軟件分析超高層建筑地基-基礎(chǔ)-上部結(jié)構(gòu)共同作用體系的時變性對樁筏基礎(chǔ)筏板彎矩的影響。分析結(jié)果表明，對于高500m以上的超高層建筑，這種影響在工程允許范圍之內(nèi)，即傳統(tǒng)計算方法的一次加載分析就能滿足筏板彎矩的計算精度要求。
［關(guān)鍵詞］超高層建筑； 時變性沉降； 施工過程； 共同作用； 筏板彎矩
中圖分類號：TU470文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2016)02-0065-06
Time-dependent raft bending moment analysis for pile-raft foundation of super tall buildings
Zhao Xin1, 2, Yuan Juyun3, 4, Liu Shehong3, 4
（1 Department of Structural Engineering, Tongji University, Shanghai 200092, China;
2 Tongji Architectural Design (Group) Co., Ltd., Shanghai 200092, China; 3 Department of Geotechnical Engineering,
Tongji University, Shanghai 200092, China; 4 Key Laboratory of Geotechnical and Underground Engineering of the
Ministry of
Education, Tongji University, Shanghai 200092, China）
Abstract:In the interaction process between superstructure and foundation for super tall buildings, materials, structures and loads are all time-dependent. Combined with engineering project and based on the time-dependent features of settlement and superstructure, time-slicing analysis approach was used to consider the time-dependent effects. Influence of time-dependent of integrated system of super tall building ground-foundation-superstructure on raft bending moment of pile-raft foundation was carried out by software PLAXIS, ETABS. The analysis results show that the bending moment differences in super tall buildings raft caused by the time-dependent effect are within permissible range of engineering practice for the super tall buildings over 500m. The once-loading analysis in traditional calculation method can meet the calculation accuracy requirements of the raft bending moment.
Keywords:super tall building; time-dependent settlement; construction sequence; interaction; raft bending moment
*上海市優(yōu)秀技術(shù)帶頭人計劃（14XD1423900），上海市科技攻關(guān)計劃（09dz1207704）。
作者簡介：趙昕，博士，高級工程師，碩士研究生導(dǎo)師，Email: 22zx@ tjadri.com。
