Two-stage energy consumption assembly type RC frame joint with beam-falling-prevention device

Abstract

The invention relates to a two-stage energy dissipation assembly type RC frame joint with a beam-falling-prevention device. The two-stage energy dissipation assembly type RC frame joint comprises a prefabricated concrete column, built-in beam-falling-prevention dampers fixed in a prefabricated concrete composite superposed beam, a built-in compression resistant damper, a steel cable and an end steel plate, wherein the built-in compression resistance damper, the steel cable and the end steel plate are fixedly arranged on lower column channel steel; the built-in beam-falling-prevention dampers in a left beam and a right beam are connected through the steel cable; the end steel plate is arranged in the middle of the steel cable; the built-in beam-falling-prevention dampers and the built-in compression resistant damper are fixed; the reserved longitudinal bars of a lower precast concrete column and the reserved longitudinal bars of an upper precast concrete column are connected through steel bar sleeves; and the longitudinal bars on the upper portion of the beam penetrate through beam embedded stirrups to complete concrete pouring. The defects that an existing assembly type beam-column joint is complex in site construction procedure, and the anti-seismic effect of an assembly type joint is poor are overcome. The energy consumption forms are diversified, each memory alloy column and compression resistant rubber in the built-in compression resistant damper consume energy in the first stage, the built-in beam-falling-prevention dampers consume energy in the second stage, and therefore dangerous situations such as beam falling and the like of the beam-column joint can be prevented.

Description

technical field [0001] The invention relates to the technical field of prefabricated building structures, in particular to a two-stage energy-consuming prefabricated RC frame node with an anti-drop beam device. Background technique [0002] At present, my country's building construction mainly adopts traditional construction methods based on on-site construction. This method has a low degree of industrialization, a large demand for labor, large resource consumption, and serious environmental pollution. It cannot meet the requirements of energy saving, environmental protection, and sustainable development. In recent years, in order to meet the needs of "green buildings" and "construction industrialization, housing industrialization", my country has begun to advocate the promotion of "industrialization mode" in construction, and has introduced relevant policies, and put forward clear development requirements for prefabricated structures. Target. [0003] my country's prefabric...

AI Technical Summary

Problems solved by technology

[0007] Existing prefabricated beam-column nodes (such as authorized announcement numbers CN107237402A and CN107165272A) utilize prestressed steel bars to achieve low-damage self-resetting after earthquakes, but prestressed bars cannot be replaced after damage, and the post-earthquake reinforcement maintenance process is cumbersome and expensive high

There is also a method of using external dampers at the joints of assembled beams and columns (such as authorization numbers CN108343170A and CN206157894U), which uses the characteristics of small deformation of viscoelastic materials to realize energy consumption. The advantage is that the dampers can be replaced after damage. There are no seals outside the damper, which shortens the service life of the damper and takes up a lot of external space.

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