CN206298957U - Bilateral formula precast prestressed concrete frame is from rehabilitation energy dissipation node - Google Patents

Abstract

The utility model relates to a double-sided prefabricated prestressed concrete frame self-healing energy-consuming node, including prefabricated columns, prefabricated beams, energy-consuming angle steel, prestressed steel strands, prefabricated beams and prefabricated columns vertically connected, and prefabricated beams are provided with Embedded bolt A, embedded bolt B built into the prefabricated beam, the prefabricated beam is connected to the prefabricated column through the energy-dissipating angle steel, the ends of the embedded bolt A and pre-embedded bolt B are pierced with energy-dissipating angle steel, and the prefabricated column is equipped with a beam Longitudinal reinforcement tunnel, prestressed reinforcement tunnel A, precast beam with prestressed tendon tunnel B, prestressed steel strands passing through prestressed tendon tunnel A, prestressed tendon tunnel B, precast beam from near precast column side to far away The side of the prefabricated column is provided with a longitudinal reinforcement channel, a steel pipe sleeve, and a longitudinal reinforcement in sequence. The longitudinal reinforcement is pre-embedded in the prefabricated column. connected, the utility model has self-healing ability under the condition of earthquake and other unfavorable loads.

Description

Double-sided prefabricated prestressed concrete frame self-healing energy-dissipating nodes

technical field

The utility model relates to a double-sided prefabricated prestressed concrete frame self-healing energy-consuming node.

Background technique

The industrialization of construction is a common direction for the development of the construction industry in all countries. At the International Committee for Architectural Research and Documentation (CIB) conference in 1989, experts from various countries listed the development of industrialization of construction as one of the eight major construction technologies in the world on the basis of summarizing the experience of various countries. One of the development trends. The industrialization of construction is to use modern scientific and technological means to replace traditional scattered handicraft production methods with industrialized and automated large-scale industrial production methods, make full use of high-tech, and create houses that people are satisfied with with the least labor force, the shortest time, and the most reasonable price. .

With the continuous and rapid growth of China's economic construction and the continuous acceleration of urbanization, the traditional construction methods have problems such as low efficiency, high cost, serious waste, difficult maintenance and management, and a large amount of construction waste. The advantages of integrated buildings, prefabricated houses, mobile houses and modular buildings in terms of speed, energy saving, and environmental protection just meet the needs of rapid urban development and large-scale construction. At present, the government strongly supports the development of green buildings and residential industrialized buildings. The government takes the lead in the implementation of prefabricated integrated housing in newly-built affordable housing, public rental housing and new urban areas. Spirit, we must speed up the pace of reform and development of the construction industry, formulate an action plan, and promote prefabricated buildings across the country, and strive to make prefabricated buildings account for more than 20% of new buildings by 2020, and prefabricated buildings account for the proportion of new buildings by 2025 above 50. This move has played a leading role in the upstream and downstream industries of the construction industry, forming a new industrial chain, and China's industrialized housing has ushered in a bright development prospect.

Due to the relatively late start of my country's precast concrete technology, which is relatively backward compared with developed countries and regions, coupled with the poor performance of concrete assembly structures in the Tangshan Earthquake, and the poor quality of traditional precast components, precast concrete components are used in the frame structure system. has not been widely used. At present, the construction method of residential structure is still based on cast-in-place concrete plus small blocks to fill the wall. It is necessary to innovate the prefabricated concrete frame structure system, conduct in-depth experiments and theoretical research, and promote the application and development of prefabricated structures in our country. At this stage, the commonly used construction methods of prefabricated buildings in China have promoted the development of China's prefabricated buildings, but they are still not perfect. There are many complex processes on the construction site, many wet operations on site, and cannot effectively shorten the construction period. As well as the cost increase caused by the increase in the technical requirements of on-site workers and the cost increase caused by the construction characteristics of the prefabricated building itself.

Contents of the invention

The purpose of the utility model is to provide a double-sided prefabricated prestressed concrete frame self-healing energy-consuming node.

In order to solve the above technical problems, a technical proposal of the present invention is a double-sided prefabricated prestressed concrete frame self-healing energy-dissipating node, including prefabricated columns, prefabricated beams, energy-dissipating angle steel, and prestressed steel strands. The prefabricated beams are symmetrically arranged on both sides of the prefabricated columns and vertically connected with the prefabricated columns. The prefabricated beams are horizontally equipped with embedded bolts A, and the connecting ends of the prefabricated beams and prefabricated columns are vertically installed with embedded bolts B. The prefabricated beams The upper and lower sides are connected to the prefabricated column through the energy-dissipating angle steel. The ends of the pre-embedded bolts A and B are pierced with the energy-dissipating angle steel, and the energy-dissipating angle steel is locked with the locking parts. Prestressed tendon channel A, prestressed tendon channel B is horizontally arranged in the prefabricated beam, and the prestressed steel strand is passed through the prestressed tendon channel A and prestressed tendon channel B, and the precast beam is composed of near prefabricated columns From the side to the side away from the prefabricated column, there are longitudinal reinforcement channels, steel pipe sleeves, and longitudinal reinforcements in sequence. The steel pipe sleeves and longitudinal reinforcements are pre-embedded in the prefabricated beams, and the longitudinal reinforcements are pre-embedded in the beam-column nodes in the prefabricated columns. The two ends of the longitudinal reinforcement on the prefabricated column penetrate the prefabricated column and extend into the tunnel of the longitudinal reinforcement and are connected with one end of the steel pipe sleeve, and the other end of the steel pipe sleeve is connected with the longitudinal reinforcement in the tunnel of the longitudinal reinforcement.

Further, energy-dissipating alloy backing plates are buried at the positions where the prefabricated columns and prefabricated beams are in contact with the energy-dissipating angle steel.

Further, the longitudinal reinforcement on the prefabricated beams on both sides is connected with the steel pipe sleeve by grouting.

Further, grouting concrete is filled between the prestressed tendons and the prestressed tendon tunnel A and prestressed tendon tunnel B, and grouted concrete is filled between the reserved longitudinal reinforcement and the beam longitudinal reinforcement tunnel and the longitudinal reinforcement tunnel.

Further, the prefabricated columns and beams are prefabricated concrete, and the strength of the grouted concrete is higher than that of the prefabricated columns and beams.

Compared with the prior art, the utility model has the following beneficial effects: simple structure, convenient construction, fast construction speed, less wet work, high construction efficiency, self-healing ability under earthquake and other unfavorable load conditions, bearing capacity and ductility It is equal to the cast-in-place structure, and the node energy consumption is better than that of the existing poured concrete frame structure.

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Description of drawings

Fig. 1 is a structural representation one of the utility model;

Fig. 2 is the second structural diagram of the utility model.

In the picture:

1- precast column; 2- prefabricated beam; 3- embedded bolt A; 4- embedded bolt B; 5- steel pipe sleeve; 6- longitudinal reinforcement; 7- prestressed steel strand; 8- beam longitudinal reinforcement channel; 9-prestressing tendon tunnel A; 10-prestressing tendon tunnel B; 11-longitudinal tendon tunnel.

detailed description

As shown in Figure 1-2, a double-sided prefabricated prestressed concrete frame self-healing energy-dissipating node includes prefabricated columns, prefabricated beams, energy-dissipating angle steel, and prestressed steel strands. The prefabricated beams are symmetrically arranged on the prefabricated columns. The two sides are vertically connected with the prefabricated columns. The prefabricated beams are horizontally equipped with embedded bolts A, and the connecting ends of the prefabricated beams and prefabricated columns are vertically installed with embedded bolts B. Connected with the prefabricated column, the end of the pre-embedded bolt A and pre-embedded bolt B is pierced with energy-dissipating angle steel, and the energy-dissipating angle steel is locked with the locking piece, and the pre-stressed tendon tunnel A is horizontally arranged in the prefabricated column. A prestressed tendon channel B is horizontally arranged in the prefabricated beam, and the prestressed steel strand is passed through a prestressed tendon channel A and a prestressed tendon channel B, and the precast beam is arranged in sequence from the side near the precast column to the side far away from the precast column There are longitudinal reinforcement channels, steel pipe sleeves, and longitudinal reinforcements. The steel pipe sleeves and longitudinal reinforcements are pre-embedded in prefabricated beams. The end penetrates the prefabricated column and then extends into the tunnel of the longitudinal reinforcement and is connected with one end of the steel pipe sleeve, and the other end of the sleeve of the steel pipe is connected with the longitudinal reinforcement in the tunnel of the longitudinal reinforcement.

In this embodiment, the self-rehabilitation function is mainly realized by the prestressed steel strands in prefabricated columns and prefabricated beams. Ordinary prefabricated concrete structures show good plasticity under low-cycle repeated loads, and have a certain deformation capacity, often forming Plastic hinge, its force and displacement curve is elliptical, and the precast concrete structure with prestress has better self-restoration. Under the same deformation conditions, the force and displacement curve shows a certain linear characteristic, showing a flag shape, and the The energy-dissipating angle steel joints can bear part of the bending moment at the beam end and play a certain role in the moment transmission. The energy-dissipating angle steel and the energy-dissipating alloy backing plate under the energy-dissipating angle steel serve as a part of the energy-dissipating element. The prefabricated columns and prefabricated beams in the As the second part of the energy dissipation element, the longitudinal rib cooperates with each other to effectively improve the energy dissipation capacity. The calculation theory follows "small earthquakes are not damaged, moderate earthquakes can be repaired, and large earthquakes do not collapse". This goal allows the structure to deform and consume energy in stages and steps. There is no obvious damage in small earthquakes, and the energy-consuming components can be replaced in moderate earthquakes. , such as angle steel, energy-dissipating alloy backing plate; or replace the self-healing component prestressed steel strand to repair the structure. In the event of a rare earthquake, the structure has sufficient strength and ductility to allow people in the building enough time to evacuate.

In this embodiment, the node structure is designed following the design principles of strong columns and weak beams and the principle of internal force balance.

In this embodiment, the position where the prefabricated columns and beams are in contact with the energy-dissipating angle steel is embedded with an energy-dissipating alloy backing plate that can dissipate energy and prevent local crushing of concrete.

In this embodiment, the longitudinal reinforcement on the prefabricated beams on both sides is connected with the steel pipe sleeve by grouting.

In this embodiment, grouting concrete is filled between the prestressed tendons and the prestressed tendon tunnel A and prestressed tendon tunnel B, and grouted concrete is filled between the longitudinal reinforcement reservation and the beam longitudinal reinforcement tunnel and the longitudinal reinforcement tunnel.

In this embodiment, the prefabricated columns and beams are prefabricated concrete, and the strength of the grouted concrete is higher than that of the prefabricated columns and beams.

In this embodiment, the energy-dissipating angle steel, pre-embedded bolt A, and pre-embedded bolt B play the role of positioning, fixing and bearing construction loads, and the energy-dissipating alloy backing plate plays the role of dissipating energy and preventing local crushing of the concrete.

The construction method includes the following steps: 1) Fix the energy-dissipating angle steel at the bottom to the joint position of the prefabricated column through the embedded bolt A; 2) Hoist the prefabricated beam in place, and insert the longitudinal reinforcement into the steel pipe sleeve at the corresponding position; 3 ) Fix the angle steel bolts at the connection nodes of the prefabricated columns and prefabricated beams, so that the prefabricated columns and prefabricated beams are connected as a whole; 4) Wear prestressed steel strands; 5) Grout into the longitudinal reinforcement tunnel and sleeve grouting; 6 ) grouting the prefabricated column and the prefabricated superimposed surface; 7) after the grouting material on the superimposed surface reaches the predetermined strength, tension the prestressed steel strand and fix it.

In this embodiment, in step 6), the grouting material for the superimposed surface is high-strength or ultra-high-strength concrete or ultra-high-performance concrete.

In this example, step 6) and step 7) pour 20mm on the beam-column joint surface according to "Technical Regulations for Prefabricated Concrete Structures" JGJ 1-2014 and "Sleeve Grouting Material for Rebar Connection" JG/T 408-2013 Thick grouting material, after the grouting material reaches the predetermined strength, the prestressed tendon is stretched and anchored to complete the installation of the node.

In this embodiment, the embedded pre-embedded bolts can be arranged as full-length pre-embedded bolts, short-length pre-embedded bolts or expansion bolts as required.

The above list is a preferred embodiment, and the purpose, technical solutions and advantages of the utility model are further described in detail. It should be understood that the above description is only a preferred embodiment of the utility model, and is not intended to limit the utility model. For the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (5)

1. a kind of bilateral formula precast prestressed concrete frame is from rehabilitation energy dissipation node, it is characterised in that：Including prefabricated post, prefabricated Beam, power consumption angle steel, prestress wire, the precast beam be symmetricly set on prefabricated post both sides and it is vertical with prefabricated post be connected, institute State to be horizontally disposed with precast beam and have pre-embedded bolt A, be vertically arranged with pre-embedded bolt B in precast beam and the connection end of prefabricated post, in advance The upper and lower side of beam processed is connected through the angle steel that consumes energy with prefabricated post, and pre-embedded bolt A, the end of pre-embedded bolt B wear power consumption angle steel simultaneously Coordinate and lock power consumption angle steel through locking member, being horizontally disposed with prefabricated post has presstressed reinforcing steel duct A, and level sets in the precast beam Presstressed reinforcing steel duct B is equipped with, the prestress wire wears presstressed reinforcing steel duct A, presstressed reinforcing steel duct B, the precast beam It is interior to be disposed with vertical muscle duct, steel pipe sleeve, vertical muscle to away from prefabricated post side by nearly prefabricated post side, it is the steel pipe sleeve, vertical Muscle is embedded in precast beam, and vertical muscle is embedded with bean column node position in the prefabricated post, and the two ends of the vertical muscle in prefabricated post are passed through Wear and stretch into vertical muscle duct after prefabricated post and be connected with steel pipe sleeve one end, the vertical muscle in the steel pipe sleeve other end and precast beam It is connected.

2. bilateral formula precast prestressed concrete frame according to claim 1 is from rehabilitation energy dissipation node, it is characterised in that： The position that the prefabricated post, precast beam are contacted with power consumption angle steel is embedded with power consumption alloy backing plate.

3. bilateral formula precast prestressed concrete frame according to claim 2 is from rehabilitation energy dissipation node, it is characterised in that： Vertical muscle on the both sides precast beam is connected with the grouting of steel pipe sleeve.

4. bilateral formula precast prestressed concrete frame according to claim 3 is from rehabilitation energy dissipation node, it is characterised in that： Grouted-aggregate concrete is filled between the presstressed reinforcing steel and presstressed reinforcing steel duct A, presstressed reinforcing steel duct B, muscle is indulged reserved vertical with beam Grouting material is filled between muscle duct, vertical muscle duct.

5. bilateral formula precast prestressed concrete frame according to claim 4 is from rehabilitation energy dissipation node, it is characterised in that： The prefabricated post, precast beam are concrete prefabricated, and the intensity of grouted-aggregate concrete is higher than prefabricated post, the intensity of precast beam.