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  李永梅  孫國(guó)富
（北京工業(yè)大學(xué)建筑工程學(xué)院  100022）

[提要]  在樁-土-上部結(jié)構(gòu)動(dòng)力相互作用中，二階效應(yīng)及節(jié)點(diǎn)板域的剪切變形對(duì)于高層鋼框架結(jié)構(gòu)的地震反應(yīng)內(nèi)力、位移等均有不可忽視的影響。研制開發(fā)的樁-土-平面桿系結(jié)構(gòu)動(dòng)力相互作用分析程序DIPSFSA不僅可直接求解考慮共同工作后鋼框架結(jié)構(gòu)各桿件的內(nèi)力和位移，而且還可以考慮節(jié)點(diǎn)剪切變形及軸力引起的二階效應(yīng)，更準(zhǔn)確地模擬結(jié)構(gòu)的實(shí)際受力與變形特征，便于Ⅲ，Ⅳ類場(chǎng)地土上鋼框架的實(shí)際設(shè)計(jì)與應(yīng)用。
[關(guān)鍵詞]  樁-土-上部結(jié)構(gòu)  動(dòng)力相互作用  節(jié)點(diǎn)剪切變形  二階效應(yīng)  分析程序

During the dynamic interaction of pile-soil-superstructure, it can not be neglected for the influences of seismic response upon the internal force and displacement of high-rise steel frame structure due to both second-order effect and joint shear deformation. Using the program DIPSFSA, the internal forces and displacement of members can be immediately solved, with considering not only interaction but also second-order effect and joint shear deformation, by which real characteristic of deformation subject of forces and quality of geometry for a structure can be more accurately simulated. Therefore, it is practical and convenient for the design of the buildings situated on the皿,Ⅳsite conditions.
Keywords:  pile-soil-superstructure; dynamics interaction; joint shear deformation; second-order effect; program