Experimental Behavior Of Concrete-filled Prefabricated Concrete Tube Column And Column Joint

Concrete-filled prefabricated concrete tube column consist of the outer highstrength precast concrete tube and the inner core cast-in-place concrete, at theconstruction site inner core region concrete is pouring after outer high strength precastconcrete tube has done large scale production in the precasting yard and hoisting.Composite material of concrete-filled prefabricated concrete tube column combinedstructure is the same, thereby having good working ability, prefabricated tube act asboth core concrete building and the bearing part, this type node of novelconcrete-filled prefabricated concrete tube column realized the demand of highstrength node and connecting between prefabricated tube and beam, the inner corecast-in-place concrete improve the lack of overall performance of frame system. Theconcrete-filled prefabricated concrete tube column can be seen as a new type ofprefabricated composite system in the high speed of construction and highperformance of structure.This paper have done studies on new type of concrete-filled prefabricatedconcrete tube column:1. Analysis of bond performance of concrete-filled prefabricated concrete tubecolumn. Some theoretical analysis of the bonding force of prefabricated tube and thecore concrete has been done based on new and old concrete bond related knowledgeand the own characteristics of concrete precast tube.2. Research on axial bearing test of concrete-filled prefabricated concrete tubecolumn. The axial compression performance of concrete-filled prefabricated concretetube column is reliable by analysis of axial compression failure properties andstress-strain rules according to axial bearing test of10square and10circle crosssection concrete-filled prefabricated concrete tube columns. Coordination coefficientsof different strength concrete have been defined and calculation method of limitbearing capacity applicable to concrete-filled prefabricated concrete tube columnunder axial compression have been put forward according to the differences ofconstitutive model of concrete with different strength and the MATLAB software, theresults show that the formulas are in good agreement with experimental values.3. Research on Numerical Simulation of axial and bias compression performanceof concrete-filled prefabricated concrete tube column. Axial and bias compressionload-strain curve of concrete-filled prefabricated concrete tube column was simulated by MATLAB software and finite element analysis software ABAQUS, and theinfluence based on changes of parameters the concrete-filled prefabricated concretetube column axial and bias compression performance was simulated by finite elementanalysis software ABAQUS, reveal the mechanism of axial and bias compression theconcrete-filled prefabricated concrete tube column.4. Research on seismic performance test of concrete-filled prefabricated concretetube column. Some comparative analysis of differences of seismic performancebetween ordinary concrete columns and concrete-filled prefabricated concrete tubecolumns have been done according to3different positions experimental studies onseismic behavior of concrete-filled prefabricated concrete tube columns, the resultsshow that concrete-filled prefabricated concrete tube column is reliable in seismicperformance.5. The construction technology of concrete-filled prefabricated concrete tubecolumn. Reference to construction method of the existing ordinary concrete columnsand concrete filled steel tube columns, combined with own characteristics ofconcrete-filled prefabricated concrete tube columns, expounds the constructionmethod of concrete-filled prefabricated concrete tube columns.