钢筋混凝土筒中筒结构内力分析与模型试验

取消筒中筒结构传统的等效连续化计算假定，按照外框筒自然的梁、柱结构状态，提出了筒中筒结构内力和位移分析的层模型计算方法，并考虑外框筒翼缘框架对抗剪刚度的贡献，层模型每层仅3个自由度，计算工作量小，计算方法简单。同时，完成了比例为1／10的筒中筒结构模型的静力试验，理论计算与实测结果吻合较好。

Force analysis and model experiment of R C tube in tube structure

Based on the nature station of beams and columns of out -frame -tube, in which the equivalent continuation method is abandoned, a story model for calculating internal force and displacement of tube in tube structure is brought out and shear stiffness of flag frame of out - frame - tube is considered in the paper. The story model has advantages of 3 free degrees per story, less calculation and simple method. At the same time, a model experiment of tube in tube structure in scale of 1/10 has been finished and the theory calculation is agreed with the test result.