Partially-fabricated concrete-filled steel tube composite column-steel beam combined joint
A technology for concrete-filled steel tubes and reinforced concrete columns, which is applied in the field of building earthquake resistance, can solve problems such as the increase in engineering cost, and achieve the effects of good deformation capacity, important engineering practical significance, social and economic benefits, and improved crack resistance.
Active Publication Date: 2021-03-12
CHANGAN UNIV
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Problems solved by technology
SFRC has significant strengthening and anti-cracking effects, which can delay the growth of micro-cracks and the collapse of micro-cavities in the matrix to a certain extent, so that its tensile, bending, and shear strengths are significantly improved compared with ordinary concrete. Impact, fatigue resistance, post-crack toughness and durability have also been greatly improved, but the application of steel fiber concrete will significantly increase the project cost
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[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.
[0045] see figure 1 , figure 2 , image 3 and Figure 4 , the partially assembled concrete filled steel pipe composite column-steel beam composite node provided by the present invention includes a steel fiber concrete shell 1, steel pipes 4, spiral stirrups 6, stiffeners and steel beams 11; wherein, the steel fiber concrete shell 1 is arranged in sections Among the three longitudinal layers of steel pipes (the shells arranged in different layers are respectively called the upper prefabricated steel fiber reinforced concrete shell, the middle layer of prefabricated steel fiber reinforced concrete shell and the lower layer of prefabricated steel fiber reinforced concrete shell), each section of steel fiber reinforced concrete shell The longitudinal reinforcement 2 arranged in the column length direction (that is, the longitudinal direction) ...
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The invention discloses a partially-fabricated concrete-filled steel tube composite column-steel beam combined joint. The combined joint comprises a multi-section partially-prefabricated concrete-filled steel tube composite column and steel beams, the multi-section partially-prefabricated concrete-filled steel tube composite column comprises a steel tube with the upper portion weakened, a partially-gradual-change stiffening rib arranged, internally-filled concrete and a plurality of sections of reinforced concrete column shells, the partially-gradual-change stiffening rib and the internally-filled concrete are mainly arranged in the non-weakened section of the steel tube, the reinforced concrete column shells are arranged on the outer side of the steel tube, externally-filled concrete is arranged between the steel tube and the reinforced concrete column shells, spiral stirrups connected with the outer wall of the steel tube are arranged in the externally-filled concrete, joint core area coupling workpieces are arranged between the adjacent sections of reinforced concrete column shells, and the steel beams are connected with the joint core area coupling workpieces. The partially-fabricated concrete-filled steel tube composite column-steel beam combined joint has the remarkable advantages of being convenient to construct, wide in applicability, high in overall performance and thelike.
Description
technical field [0001] The invention belongs to the field of building anti-seismic, and relates to a steel pipe concrete composite column which can avoid rigidity mutation in the structure. Background technique [0002] Concrete-filled steel tube structure is a main form of steel-concrete composite structure. It has the characteristics of high bearing capacity, high rigidity, good seismic performance, saving steel, and reducing engineering cost. It has been more and more widely used in long-span structures and high-rise buildings. and super high-rise buildings. [0003] With the continuous increase of building height and span, the load borne by the columns is increasing. In order to meet the requirements of the axial compression ratio in the structural design, the section size of the bottom column is increased, resulting in the formation of short columns at the bottom of the structure, and the deformation capacity of short columns and The seismic performance is poor. The a...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E04B1/30E04B1/58E04C3/32E04C3/34
CPCE04B1/185E04B1/30E04C3/32E04C3/34
Inventor 周天华余吉鹏张钰王继琴李亚鹏
Owner CHANGAN UNIV