大底盤多塔樓結(jié)構(gòu)的振動計算*
包世華 王建東
- 摘 要
-
包世華 （清華大學(xué)土木系 北京 100084）王建東 （河北省建筑設(shè)計研究院 石家莊 050011）[提要] 本文用沿高度方向分段連續(xù)化的方法，對底部為大底盤、上部為多塔樓的高層建筑結(jié)構(gòu)，建立了其水平振動的微分方程組。用常微分方程求解器COLSYS求解其自振頻率及相應(yīng)的振型，討論了其振動的特性，為復(fù)雜結(jié)構(gòu)提供了一種可用于設(shè)計的動力計算簡化方法。
[關(guān)鍵詞] 高層建筑結(jié)構(gòu) 大底盤 多塔樓 水平振動 解析解 動力特性In this paper, firstly using the commonly used continuum technique for multi-towers with enlarged base in the lower floors, a new piecewise continuous vibrational model is established. Then, the vibrational differential equations for the model have been derived. Secondly, using the ODE (Ordinary Differential Equation) solver, which is a general-purpose program developed for solving various ODE problems including eigen value problem, the natural frequencies and vibrational modes have been obtained, and the dynamical behaviours for different parameters are discussed.
Keywords: tall building structure; multi-towers; enlarged base; horizontal vibration; dynamical behaviours
