On the basis of analysis previous experiment data , it is conclusion that allowable value of drift angle of elastic and elastic - plastic is 1 / 550 and 1 / 75 respectively , which is applicable to r . c . frame structure with special - shaped column is given out . the conclusion explains that the deformabiliry of r . c . frame structure with special - shaped column lies between rectangle column frame structure and shear wall structure . the calculating formula of allowable value of axial load ratio of special - shaped column is derived , it is compared with that of equaling areas rectangle column 根据对前人试验数据的统计分析，给出了适用于异形柱框架结构的弹性和弹塑性层间位移角限值分别为1 550和1 75 ；指出了异形柱框架结构的层间变形能力介于普通矩形柱框架结构和剪力墙结构之间；以t形柱为例，推导了异形柱轴压比限值的计算公式，通过与等面积矩形柱的对比分析，认为异形柱的轴压比限值与其截面尺寸的比例关系有关；当腹板受压或翼缘受压时， t形柱轴压比限值存在较大差异；不同的荷载角作用，轴压比限值变化较大；矩形柱的轴压比限值要大于异形柱的轴压比限值。
According to the fact of seismic design of our country , a practical displacement - based seismic design method is put forward . the seismic performance level is divided into three : serviceability , life - safety , and collapse protection , hi order to control the performance level of the structure , the three levels are quantified with story drift angles 为了与我国建筑抗震设计规范的设防目标相协调，并便于在设计计算中予以控制，本文将建筑结构的功能划分为三个水平，即使用良好、人身安全和防止倒塌，并采用层间位移角限值来量化框架结构的功能水平。
The conclusions are as following : ( a ) the element dimensions of frames in 7 . 5 regions are determined mainly by axial compressive ratio . the reinforcements in most columns are dominated by the minimum reinforcement rate . and the element dimensions of frames in 8 . 5 region are determined by both axial compressive ratio and maximum inner - storey drift angle 结果表明： 7度半结构的截面尺寸主要由轴压比决定，绝大部分柱配筋由最小配筋率控制，而8度半结构的截面尺寸由轴压比和最大层间位移角两个因素同时控制，最小配筋率对柱配筋的影响很小。
