Steel-concrete beam and column connection joint with weakened section and construction method of steel-concrete beam and column connection joint

Abstract

The invention relates to the technical field of fabricated building construction, and discloses a steel-concrete beam and column connection joint with a weakened section and a construction method of the steel-concrete beam and column connection joint. The steel-concrete beam and column connection joint comprises a concrete column, a crossbeam and the weakened section for connecting the crossbeam with the concrete column, a steel sleeve is arranged on the position, connected with the crossbeam, of the surface of the concrete column, the weakened section is arranged at the end of the crossbeam,a connecting end plate is arranged at the end of the weakened section, the surface of one side of the connecting end plate and the surface of the steel sleeve are attached and fixed by a split screw,and the split screw penetrates through the connecting end plate and the concrete column and then is fixed through locking of a locking nut; and the weakened section is H-shaped steel with flanges weakened, arc-shaped weakened parts are symmetrically arranged on an upper flange plate and a lower flange plate correspondingly, the distance a between the arc-shaped weakened parts and the surface of the concrete column connected with the arc-shaped weakened parts is 0.5-0.75 time the width of the flange plates of the weakened section, and the distance d between the arc-shaped weakened parts and theend face of the crossbeam is 0.5-0.75 time the width of the flange plates of the weakened section, wherein the formula of d<<a is met. The steel-concrete beam and column connection joint is simple instructure and convenient to mount and demount, and the energy consumption performance of a core area of the connection joint is effectively improved.

Description

technical field [0001] The invention relates to the technical field of prefabricated building construction, in particular to a steel-concrete beam-column connection node with weakened segments and a construction method thereof. Background technique [0002] As the country vigorously promotes urbanization and prefabricated buildings, the market demand potential for prefabricated concrete public buildings and prefabricated concrete houses is huge. However, the current domestic prefabricated concrete structure construction process is relatively cumbersome, resulting in problems such as low construction efficiency and difficult to guarantee construction quality. The market-oriented development of concrete buildings. [0003] my country is a country with frequent earthquakes, and higher energy consumption performance requirements are put forward for the design and construction of prefabricated concrete public buildings and prefabricated concrete residential buildings. Among the...

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Problems solved by technology

[0004] At present, the commonly used beam-column connection nodes in my country's construction field are generally bolted and welded hybrid connections. There are many types of specific implementation structures, but this connection method has relatively serious stress concentration at the welding seam, and the plastic hinge is closer to the column surface. , it is easy to cause the shear buckling of the column web at the joint, the local buckling of the column flange and the yielding of the beam end plate, the ductility and energy dissipation capacity of the joint are poor, and the seismic capacity and energy dissipation performance of the formed connecting joint and frame structure are relatively poor Difference

[0005] In order to solve the above problems, cover plates, stiffening plates or side plates are usually added at the joint positions of the beam ends to reinforce the beam ends. The reinforcement of the part will additionally increase the bending resistance of the steel beam, and the requirement for the section of the steel column will be significantly increased, which will virtually increase the difficulty of design and construction cost

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