| Domestic industrialization, which is emphasized to manufacture industrialized house in the large-scale in order to improve production efficiency and overall quality, has become the mainstream of international residential building industry development. Prefabricated concrete can realize prefabrication, assembly, shorten the duration, reduce cost, ensure the building quality, save energy and reduce the impact of construction waste. It is the trend for domestic industrialization to develop prefabricated structure house industrialization. Connection is the key point of prefabricated concrete structure and has the significant influent on the whole structure. Currently there are many areas for improvement on total precast beam-column, column-column and shear wall connection joints, which will require the development of new integrated connection of dry joints.The paper takes full advantage of connections of steel structure, comparing strengths and weaknesses of various dry-type connections, presenting new column-column connections, beam-column connections and shear-wall connections of prefabricated concrete structure, raising to qualitative analysis of mechanical properties and characteristics of the new connections.As for the several column-column dry-type connections(flange steel connection,, new tongue-and-groove connection, tenon type-flange connection) and beam-column dry-type connections(hidden corbel-flange connection, tenon type-flange connection), overall force analysis was conducted, then analyze and study respectively on column-column connections in the important of pass force components, widget-pre-buried pieces, flange board and high strength bolt, tooth column, notch column, the components of beam-column connections, hidden corbel, notch beam, and tenon, for the purpose of obtaining flange-steel connection column, and tenon-flange connections, as well as new calculation formula of bearing capacity of beam-column connections.ABAQUS finite element models of conlumn-conlumn tenon type-flange connection, beam-conlumn tenon type-flange connection and cast-in-place components under the static conditions are established. The calculation results are accord well with the theory and the capacity of new connections has been improved with the comparison of cast-in-place components under the static conditions and the ductility of new connections and cast-in-place components are quite equal. The influence of bolt number, flange thickness, concrete strength, axis compression ratio, tooth column height on the capacity and deformation of new conlumn-conlumn connections and bolt number, flange thickness, tenon length on the capacity and deformation of new beam-conlumn connections are calculated and analysed for the purpose of optimizing the structure of connections. |
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