Study On The Seismic Behavior And Capacity Calculation Of The Steel Tubular Assembly Column

Pre-fabricated assembly concrete structure as an obvious advantage is one of themain forms in the development of construction industry in the future. However, themain problem is node connection on preventing the development of the assemblystructure. It is very important for the seismic performance in the connection of columnsand column, for that the column is the main lateral force resisting members of thePillars frame and Frame-wall structure. In recent years, domestic and foreign scholarson the column and the column node connections have done a lot of researches, but theconnections of column joint are always complex on structure and inconvenient inconstruction. Therefore, this paper propose and demonstrated a new column to columnconnection by the quasi-static test.It is local outsourcing steel tube assemble-monolithiccolumn joints. This paper will research the seismic performance in this way connectedassembly column. At the same time,it will analysis such joint bearing capacity andestablish the restoring force model suitable for the local steel tubular assembly columnand cast-in-place column.The article main to study the seismic performance of the local outsourcing steeltube assemble-monolithic column by an ordinary high-strength spiral reinforcement situcolumn and the3local outsourcing steel tube assembly column using high-strengthspiral reinforcement by a quasi-static test. Then the seismic performance of the localoutsourcing pipe assembly columns have been researched, such as hysteresis curves,skeleton curves, ductility, stiffness degradation, strength degradation, and energydissipation capacity. At the same time, this paper have been in-depth analyzed the joint’sbearing capacity and stiffness on the deterioration of the column. The test results show that the local steel tubular assembly column joints can keep the integrity of theassembly column, and the node connection is secure and reliable.By analyzing the bearing capacity of the local outsourcing pipe assembly columnjoints, the results showed that the local outsourcing pipe assembly column jointsequivalent to steel tubular column and its carrying capacity is higher than the bearingcapacity of cast-in-place column corresponding position. By combining assemblycolumn failure modes and connection nodes mechanical characteristics, the assemblycolumn joints normal section bearing capacity formula are given, which can be used fordesigning and checking of the overall structure of the actual assembly frame columnjoints.According to the test results，this paper establish the theoretical skeleton curveof the component，and analysis of the specimen stiffness degradation rule. Then therestoring force model is proposed by combined with hysteretic curves, skeleton curvesand stiffness degradation rule. It is suitable for high-strength spiral hoop cast-in-placecolumn and local outsourcing pipe assembly column.Also the restoring force provides areference for further finite element analysis and seismic elastic-plastic time historyanalysis.