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（北京市建筑設計研究院有限公司， 北京 100045）
［摘要］合肥市科技館新館（自然博物館）建筑高度38-5m，為具有扭轉不規(guī)則、偏心布置、凹凸不規(guī)則、樓板不連續(xù)、尺寸突變等不規(guī)則項的特別不規(guī)則超限高層建筑，其中從地面延伸至26-5m高、總長138m的種植大懸挑斜屋面是建筑造型亮點。雖然單向大面積斜板在地震作用下具有斜撐作用，但會引起雙向剛度不均、扭轉、底部豎向構件剪力集中、大量短柱和超短柱、傳統(tǒng)結構樓層整體指標（層間位移角、位移比、0-2V0調整系數(shù)等）的計算方法不適用等問題。針對上述結構設計難點，采取了以下設計措施：1）采用合理的構造做法，在斜板底部設置滑動支座，釋放水平向約束，減小斜板對整體剛度影響，避免地震下底部內力集中；2）按構件真實布置建立空間計算分析模型，模擬結構實際剛度和復雜受力情況；3）選擇合適的樓層指標統(tǒng)計方法，并補充平板模型對比分析，以反映結構在地震下的整體性能；4）采用動力時程分析法補充計算；進行大震下的動力彈塑性時程分析；5）合理指定關鍵構件，設定合理性能目標和加強措施。結果表明，采取以上措施滿足結構抗震性能目標。
［關鍵詞］斜板； 性能目標； 抗震措施； 關鍵構件； 大懸挑； 不規(guī)則超限高層建筑
中圖分類號：TU398-7文獻標識碼：A文章編號：1002-848X(2019)18-0071-06
Structural design of Hefei Science and Technology Museum (Natural Museum)
Geng Haixia, Jiang Yang, Zhou Wenjing, Chang Yingying, Li Ting, Yang Yong, He Yang
（Beijing Institute of Architectural Design, Beijing 100045, China）
Abstract:Hefei Science and Technology Museum (Natural Museum) is 38-5m high-rise building with irregular torsion, eccentric layout, concave-convex irregularity, discontinuous floor and abrupt size change. It is a special irregular out-of-code high-rise building. The planting large-cantilever inclined roof with a total length of 138m extending from the ground to the height of 26-5m is the highlight of architectural modeling. Although the single-direction inclined plate with large area has the inclined bracing effect under the earthquake, it will cause the problems such as uneven bidirectional stiffness, torsion, concentrated shear force of vertical members at the bottom, a large number of short columns and ultra-short columns, and inapplicable traditional calculation method of the overall indexes of structure floors including inter-story displacement angle, displacement ratio, adjustment coefficient for 0-2V0. In view of the above structural design difficulties, the following design measures were adopted: 1) reasonable structural practices were adopted by setting sliding supports at the bottom of the inclined plate to release horizontal constraints, reduce the impact of the inclined plate on the overall stiffness and avoid the concentration of internal forces at the bottom under the earthquake; 2) a spatial calculation and analysis model was established according to the real layout of the components to simulate the actual stiffness and complex stress of the structure; 3) the appropriate statistical method of floor indicators was selected, and the plane plate model was supplemented as the comparative analysis to reflect the overall performance of the structure under the earthquake; 4) dynamic time-history analysis method was conducted for supplementary calculation, and dynamic elastic-plastic time-history analysis was carried out under the rare earthquake; 5) key components were reasonably specified to set reasonable performance targets and strengthen measures. The results show that the above measures meet the seismic performance target of the structure.
Keywords:inclined plate; performance objective; seismic measure; key element; large cantilever; irregular out-of-code high-rise building
作者簡介：耿海霞,碩士,工程師,Email：genghaixia2012@163.com。
