Two-stage energy dissipation fabricated rc frame joint with anti-drop beam device

Abstract

The invention relates to a two-stage energy-consuming assembled RC frame node with an anti-fall beam device, comprising: a prefabricated concrete column, a built-in anti-fall beam damper fixed in the precast concrete composite superimposed beam and fixedly arranged on the lower column respectively Built-in anti-compression dampers for channel steel, steel cables, end steel plates. The built-in anti-drop beam shrinkage dampers in the left and right beams are connected by steel cables, and the end steel plates are set in the middle of the steel cables; The reserved longitudinal reinforcement of the upper column is connected through the reinforcement sleeve, and the upper longitudinal reinforcement of the beam passes through the pre-embedded stirrup of the beam to complete the concrete pouring. The invention solves the shortcomings of the existing fabricated beam-column joints, such as complex on-site construction procedures, poor seismic effect of the assembled joints, and the like. The forms of energy consumption are diversified. In the first stage, memory alloy columns and anti-compression rubber in the built-in anti-compression damper consume energy. In the second stage, the built-in anti-drop beam damper consumes energy, and can prevent beam-column joints from falling beams and other dangerous situations. .

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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