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In recent years, steel square tubular column H steel beam frame structure system has become one of the main direction of development of residential steel. Corresponding norms, procedures applied in the form of this new type of structural system node is relatively small, in some extent, restricted its engineering applications. To tie in with the launch of the promotion of the CFRT structure and design procedures hinged, semi-rigid connection and just pick three node type summed up the form and the mechanical characteristics of the currently used node, and a brief introduction just access node the status quo. On this basis, the paper presents a novel just connected nodes - node of the outer rib ring plate, and from two aspects of theoretical and experimental study of its mechanical properties. Firstly, external the rib ring node beam flange pull model power transmission mechanism, node bearing capacity formula based on the yield line theory. Static tensile test specimens by 10 node model to study the structure and properties of the steel square tubular column and steel beam flange connection. The destruction process and characteristics of each specimen, analysis of stress transfer mechanism of the node domain, and node bearing capacity of the measured values ??and the theoretical calculation of the value of a comparative analysis. The results show that the outer the rib ring plate node beam flange tension model has a higher carrying capacity and good ductility in the steel tube filled with concrete help to improve the to yield bearing capacity and stiffness node. The formula proposed by the theoretical analysis to better predict the the yield bearing capacity of the node model. In this paper, three full scale of the cross-shaped specimen for the study of the seismic performance of the ring of outer rib plate, the quasi-static tests. Describes the process and characteristics of the destruction of the specimen, analysis of the the node domain stress transfer mechanism. Then measured hysteresis curve, the of node bearing capacity, ductility, energy dissipation capacity, strength degradation, stiffness degradation seismic performance indicators detailed comparative analysis. The analysis results show that the outer rib ring plate node structure is simple and reasonable measures, and has a good seismic performance. Through the empty steel specimens and filled with concrete specimens comparative analysis, that will help to improve the seismic performance of concrete filled steel tube. In this paper, after testing and analysis: The outer rib ring plate node force transfer is reliable, simple structure, which has broad application prospects.
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