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（1 合肥工業(yè)大學(xué)土木與水利工程學(xué)院， 合肥 230009； 2 中國船舶重工集團(tuán)公司第七一三研究所， 鄭州 450015）
［摘要］利用有限元分析軟件ANSYS對地震激勵下的土-結(jié)構(gòu)動力相互作用體系進(jìn)行了數(shù)值計算，分析了高層建筑箱形基礎(chǔ)的抗震性能。將靜態(tài)分析結(jié)果與工程實測數(shù)據(jù)對比，結(jié)果吻合較好，確保了模型的計算精度；輸入El Centro波、Kobe波和上海人工波作為激勵，進(jìn)行非線性時程分析，研究箱形基礎(chǔ)不同測點的水平方向位移以及與土的接觸壓力。結(jié)果表明：箱形基礎(chǔ)兩側(cè)對應(yīng)測點的位移時程曲線的趨勢基本保持一致，表明箱形基礎(chǔ)的各部分在地震過程中的振動是整體有序的，從而解釋了箱形基礎(chǔ)抗震性能良好的根本原因；核心筒的存在，平衡了箱形基礎(chǔ)由形狀不規(guī)則而引起的各方向剛度的差異，提高了箱形基礎(chǔ)的抗震性能；箱形基礎(chǔ)與土脫離和再接觸的現(xiàn)象表明，基礎(chǔ)在振動過程中是不斷搖擺的，從而解釋了地震時高層建筑傾斜、傾覆的原因，證實了基礎(chǔ)抗傾覆能力的重要性。
［關(guān)鍵詞］箱形基礎(chǔ)； 抗震性能； 土-結(jié)構(gòu)動力相互作用； 地震激勵； 時程分析； 數(shù)值計算； 抗震優(yōu)化設(shè)計
中圖分類號：TU473-2文獻(xiàn)標(biāo)識碼：A文章編號：1002-848X(2018)01-0077-06
Seismic performance analysis of boxshaped foundation of an outofcode highrise building
Qian Deling1, Li Yingchao2
(1 School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China;2 The 713th Research Institute of China Shipbuilding Industry Corporation， Zhengzhou 450015, China)
Abstract:The numerical calculation of soil-structure dynamic interaction under seismic excitation was carried out by using the finite element analysis software ANSYS，and seismic performance analysis of the box-shaped foundation of a high-rise building was analyzed. The data of static analysis were compared with the real measurement data in project and the result shows they are in good agreement to ensure the calculation accuracy of the model. Nonlinear time-history analysis was carried out by inputting El Centro wave, Kobe wave and Shanghai artificial wave as excitations. The horizontal displacements and the contact pressures on soil of different measuring positions of the box-shaped foundation were researched. Results show that the tendency of the displacement time-history curves of the corresponding measuring points on both sides of the box-shaped foundation are basically the same, indicating that the vibration of each part of the box-shaped foundation during the earthquake is overall and orderly, thus revealing the root cause of good seismic performance of the box-shaped foundation. The existence of the corewall balances the difference of stiffness in all directions caused by the irregular shape of the box-shaped foundation and improves the seismic performance of the box-shaped foundation. The phenomenon of separation and re-contact of the box-shaped foundation with the soil shows that the vibration of foundation in the process is constantly swinging, which explains the reasons for high-rise buildings tilt and overturning during the earthquake, confirming the importance of anti-overthrow ability of foundation.
Keywords:box-shaped foundation; seismic performance; soil-structure dynamic interaction; seismic excitation; time-history analysis; numerical calculation; seismic optimal design
*國家自然科學(xué)基金資助項目（51378168），中央高?；究蒲袠I(yè)務(wù)費專項資金資助項目（2012HGZY0024）。
作者簡介：錢德玲，博士，教授，博師生導(dǎo)師，Email：dlqian@sina.com。
