Based on the analytical result , the axial force is large and the moment is negligible , whether the failure mode of these columns is unstable failure - if unstable failure happens , the bearing capacity of these columns may be less than that of material failure , the safety of this project may not be guaranteed 根据本工程内力分析结果,柱轴力很大,弯矩极小,该细长柱是否会发生失稳破坏?如果发生失稳破坏,其承载能力将会低于按规范计算的材料破坏承载力,则工程的安全性将得不到保证。
Based on the experiments and the research on rpc filled steel tubular structure at home and abroad . the experimental study of 18 rpc filled tubular steel short columns has yielded some positive results : 1 . the paper made up experiment on the strain , deformation and ultimate loading capacity of the specimens on the different load and collects the data 本文在学习消化国内外有关试验和理论研究成果的基础上，进行18根钢管活性粉末混凝土短柱轴压承载力的试验，取得了以下的初步成果： 1 、测试采集了各级荷载下试件的应变、位移和极限承载力等实验数据。
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。
A calculation formula with a clear and definite physical meaning is derived for the limit value of the axial compressive ratio of src column , the result out of which is in agreement with the limit value of the axial compressive ratio of reinforced concrete column precscribed by " code for design of concrete structures " 摘要文章推导出了具有明显物理意义的型钢混凝土柱轴压比限值的计算公式，且其结果与《混凝土结构设计规范》中规定的钢筋混凝土柱的轴压比限值有很好的吻合度。
3 . by checked the results of experiment against the results of simplified calculating formula , discuss representative design methods of concrete filled steel tubular columns in different codes . based on the result of experiment , this paper proposes the simplified calculating formula of ultimate strength of rpc filled steel tubular 3 、通过对试验值与计算公式理论值的比较分析，对有代表性的几种规范给出的钢管混凝土承载力计算公式进行评述，基于试验结果，提出钢管活性粉末混凝土短柱轴压承载力的建议公式。
The arrangement of damped bracings has obvious effect on earthquake - reduction effect of viscous damper . so the effect of damped bracings on structural seismic performance is approached from these aspects : the effect of damped bracings on column axial force , geometric form of bracings , vertical layout of bracings and spatial arrangement . then the best arrangement principles of damped bracings are given and the reasonable layouts which can control structure torsion efficiently are analyzed preliminarily by random vibration theory 2 、阻尼支撑的布置形式对其减震效果有显著的影响，本文探讨了阻尼支撑对柱轴力的影响，研究了阻尼支撑自身的形式、竖向布置及空间布置方式等对结构抗震性能的影响，总结了阻尼支撑的最优布置原则；并利用随机振动理论初步分析了有效控制结构扭转效应的阻尼支撑的合理布置方式。
