2 comparison of calculation methods for bearing capacity of cfstc under eccentrically loading concrete filled steel tubular columns are the keys to solve the problem of " stout column " in tall building . there is not much research about characteristics of concrete filled steel tubular in tall building in our national and abroad 二对钢管混凝土柱偏心受压承载力的计算方法的分析研究钢管混凝土柱是解决高层建筑中“胖柱”问题的关键，但有关钢管混凝土高层建筑工作特性问题，目前国内外的研究并不多。
2 based on experimental results and finite elements analysis of new joint , the stress transfer mechanism of the new joint is analyzed . there are two stress transfer patterns about the new joint , one is for rectangular steel tubular column joint , its stress transfer pattern is that beam moment is transferred to column webs mainly by stiffeners , the other is for crft column joint , its stress transfer pattern is that part of beam moment is transferred from stiffeners to column webs , another part of beam moment is transferred to infilled concrete by column flange (二)基于新型节点的试验结果和有限元分析，研究了新型节点的传力机理，其应力的传递路径分为两种：对于钢管柱节点，梁端弯矩主要通过加劲肋板直接传至柱腹板，对于钢管混凝土柱节点，梁端弯矩一部分通过加劲肋传给柱腹板，另一部分通过柱翼缘传给钢管内的混凝土。
Based on the investigation of research and application of concrete - filled tubular column to steel beam connections in china and abroad , according to engineering practice , six full - size specimens that the joints composed by concrete - filled square tubular column and i - shape steel beam divided as a and b groups have been tested under cyclic - loading in this paper . the three specimens of group a are connected by bolt - weld and the group b connected by welded at the end of beams 本文在总结分析了国内外关于钢管混凝土框架节点研究与应用现状的基础上，以实际工程为背景，在国内首次进行了a 、 b两组共6个足尺节点试件的低周反复循环加载试验，其中a组三个试件梁端采用栓-焊连接； b组三个试件梁端为全对接焊接。
The rectangular concrete - filled steel tubular ( cfst ) composite structures have the special properties , such as high - strength , good ductility , better seismic behavior , and convenient construction , etc . study on the seismic performance of rectangular concrete - filled steel tubular column to steel beam connections has the important theoretical significance and huge engineering values , and also helps to understand the mechanic behavior and configuration of the connection , to promote the applications of this kind of composite structures in seismic area of china 矩形钢管混凝土组合结构具有强度高、延性好、抗震性能优越、施工方便等特点。开展矩形钢管混凝土梁柱节点的抗震性能研究，对于了解节点力学性能，改善节点构造，促进矩形钢管混凝土组合结构在地震区的推广应用具有重要的理论意义与工程应用价值。
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 advantages of circular steel tubular columns filled with steel - reinforced concrete are discussed by comparison to reinforced concrete columns . from the above analysis , we can conclude that circular steel tubular columns filled with steel - reinforced concrete which have high load - carrying capacity as well as excellent ductility can be used widely especially in the buildings of strong seismic intensity zone 从试验研究、理论分析和试设计的结果，可以看出钢骨?钢管混凝土柱具有很高的承载力和很高的延性，这种柱具有广泛的应用前景，特别适用于高地震烈度区柱的设计。
