A uhpc-cfst composite column structure and its construction method
A UHPC-CFST, composite column technology, applied in the direction of columns, piers, pillars, etc., can solve the problems of inability to fully utilize the CFST structure and the low utilization rate of the CFST structure, and achieve the effects of easy promotion, high rigidity and simple construction methods.
Inactive Publication Date: 2016-03-30
FUZHOU UNIV
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Problems solved by technology
[0003] CFST structure has become one of the most widely used structural forms in housing construction and bridge engineering due to its advantages of small cross-sectional size, high rigidity and pressure bearing capacity, good seismic performance, and convenient and quick construction. When CFST structure is combined with ordinary reinforced concrete structure , due to the different mechanical performance of the two structures, the combined structure cannot give full play to the advantages of the CFST structure, especially in the case of small axial compression and eccentricity, the damage of the structure is determined by ordinary reinforced concrete, and the corresponding CFST The structure is not well utilized
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[0023] Such as Figure 1~3 As shown, a UHPC-CFST composite column structure, the UHPC is an ultrahigh performance concrete (UltraHighPerformanceConcrete, UHPC for short), and the CFST is a concrete filled steel tube (ConcreteFilledSteelTube, CFST for short), including UHPC board 1, the UHPC The left and right ends of the plate 1 are respectively symmetrically fixedly connected with CFST columns 2. The CFST columns 2 include steel pipes 21 in which ordinary concrete 22 is poured to form the CFST columns 2, and the UHPC plate 1 is provided with at least one row A steel bar mesh 12 for force transmission and construction is formed by staggering a number of transverse steel bars 121 and longitudinal steel bars 122. The right and left ends of the steel bar network 12 close to the CFST column 2 are respectively symmetrically fixedly connected with shear connectors 3, the The shear connector 3 is fixedly connected to the outer peripheral wall of the steel pipe 21 via the structural co...
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The invention relates to a UHPC-CFST combination column structure. The UHPC-CFST combination column structure comprises a UHPC-CFST plate, wherein the left and right ends of the UHPC plate are symmetrically and fixedly connected with CFST columns; each CFST column comprises a common steel tube into which common concrete is poured; at least one row of reinforcement mesh which is formed by interleaving a plurality of transverse reinforcements and longitudinal reinforcements and used for force transfer and construction is arranged in the UHPC plate; anti-shear connecting pieces are symmetrically and fixedly connected with the left and right ends, close to the CFST columns, of the reinforcement mesh; the anti-shear connecting pieces are fixedly connected with the outer peripheral wall of the steel tubes by use of construction connecting pieces. The invention also relates to a construction method of the UHPC-CFST combination column structure. The UHPC-CFST combination column structure is high in force bearing capacity, high in rigidity, low in self-weight and good in durability; the construction method is easy to operate; besides, the respective advantages of UHPC and CFST can be developed thoroughly and a new structural combination effect can be generated.
Description
Technical field [0001] The invention relates to a UHPC-CFST combined column structure and a construction method thereof. Background technique [0002] UHPC is a new type of ultra-high-strength concrete with ultra-high strength, low brittleness, excellent durability and broad application prospects that has been successfully studied after the continued high-strength and high-performance concrete. Compared with ordinary concrete, UHPC has extremely high compressive and Flexural strength, ultra-high impermeability and good wear resistance, better ductility and higher tensile strength, UHPC's superior performance makes it suitable for municipal, petroleum, nuclear power, marine and other engineering and military installations. Broad application prospects. [0003] CFST structure has become one of the most widely used structural forms in housing construction and bridge engineering due to its small cross-sectional size, large rigidity and pressure bearing capacity, good seismic performan...
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IPC IPC(8): E04C3/36E04G21/02
Inventor 陈宝春晏巧玲韦建刚
Owner FUZHOU UNIV