Abstract : on the basis of the stat - of - the - art of protective buffers for base isolation , the step - stiffnessbase isolator of concrete filled steel tubular short column is put forward 文摘:在总结目前基础隔震缓冲限位装置现状的基础上，提出了梯队式变刚度钢管混凝土短柱基础隔震装置。
The stress state of a composite column and a short steel tubular column filled with steel - reinforced concrete was comprehensively analyzed and rationally simplified 摘要从钢骨钢管混凝土组合柱的工作机理出发，分析了其各组成部分应力状态，提出了计算钢骨钢管混凝土轴压短柱的简化模型。
The influence of several parameters including strength of rpc ( fc ) , hoop coefficient ( ) and ratio of slenderness ( l / d ) on the bearing capacity of rpc filled steel tubular 2 、根据实验结果，分析钢管混凝土短柱轴压的受力性能，探讨rpc强度fc 、套箍系数及长径比l / d对承载力的影响。
The ultimate capabilities of the stub column specimens made of channel or angle tubes can increase more than 18 % or 29 % respectively comparing with the specimens without ribs 设肋的短柱能达到较高的极限承载力，与无肋的试件相比，单向设置斜肋短柱的极限承载力提高了18 % ，双向设置斜肋的提高了29 % 。
The test results another is made of four welded equal - leg angles with show that the ribs ( lips ) cohere with concrete very well before the specimens are damaged , and the damage modes are mainly of shear forms 结果表明：薄壁钢管混凝土短柱以剪切破坏模式为主；肋与混凝土在试件破坏之前，均能保持良好粘结。
The calculated results based on the proposed equation are in good agreement with the test results , and they can be used for the shear design and computation of short restrained reinforced concrete columns 通过对比表明，公式计算值与试验值吻合较好，对于钢筋混凝土约束短柱的抗剪设计与计算具有实用的参考价值。
On the other hand , due to the difference of the loading form on eccentric loading column with push - out test and short - column test , the bond - slip performance ca n ' t be displayed in it 同时，由于推出试验( push - outtest )和短柱试验( short - columntest )与偏压柱的受力状况有差别，并不能真正反映出构件中的粘结滑移性能。
In paper , it introduces their characters one by one . 3 ) axle center and partial pressed component when the longitudinal pressure is through the axle center of component , we call it as axle center pressed com 3 ）轴心受压构件与偏心受压构件纵向压力通过构件截面重心的构件称为轴心受压构件c轴心受压构件可分为短柱和长柱两大类。
It is concluded that material non - linearity plays the major role in controlling the behavior of frames . therefore reasonable results can be obtained by considering material non - linearity only in the analysis of some cases : e . g . , 材料非线性在控制框架性能上起主要作用。因此在分析某些构件如垂直荷载下的短柱框架，仅考虑材料非线性可以得到合理的结果。
There are two different constitution forms for the square tubes with ribs in the test specimens , one consists of two welded channels with stiffening lips ( channel tubes ) , stiffening lips ( angle tubes ) 根据无肋、单向设置斜肋和双向设置斜肋3种截面形式、 2种截面尺寸的18个薄壁钢管混凝土轴压短柱试验结果，比较和分析了各试件的试验现象、破坏模式及荷载位移曲线等。
