CN207944553U - Unbonded prestressed concrete frame consuming energy by utilizing anchoring support - Google Patents

Abstract

The utility model discloses a non-bonding prestressed concrete frame utilizing anchor support for energy consumption, which comprises ordinary reinforced concrete columns and self-controlling energy-consuming non-bonding prestressed concrete beams, and the self-controlling energy-consuming non-bonding prestressed concrete The beam includes self-controlled energy-dissipating elements, positioning steel bars, stirrups, unbonded prestressed tendons, beam upper longitudinal ribs, beam lower longitudinal ribs, and anchor ends of prestressed tendons; the unbonded prestressed tendons are arranged in a curved shape, and the The self-control energy-dissipating element is arranged at the anchor support of the unbonded prestressed beam, and the self-control energy-dissipating element includes the outer part of the deformation box, the main body of the deformation box, the inner part of the deformation box, the pressure bearing plate and the side baffle. The frame system of the utility model has the advantages of good anti-crack deformation performance, light weight and simple construction of the unbonded prestressed concrete structure, and creates a new way for the popularization and application of the unbonded prestressed concrete frame structure in the earthquake zone.

Description

Unbonded Prestressed Concrete Frame Using Anchor Supports for Energy Dissipation

technical field

The utility model relates to a construction engineering frame structure system, in particular to an unbonded prestressed concrete frame utilizing anchor supports to consume energy.

Background technique

Existing studies generally suggest that frame structures, including unbonded prestressed concrete frame structures, use hybrid energy dissipation mechanisms for seismic design, and beam-hinge energy dissipation mechanisms are better than hybrid energy dissipation mechanisms. Because the beam-hinge energy dissipation mechanism mainly relies on the plastic hinge at the beam end to dissipate the seismic energy, the ductility requirement for the column end is not high, and the beam-hinge mechanism does not increase much the curvature ductility required for the critical section; The seismic energy is dissipated by the column hinges, so there is a higher requirement for the section ductility of the column ends.

Utility model content

The purpose of this utility model is to overcome the disadvantages of poor energy dissipation capacity of unbonded prestressed concrete structures, and provide a self-controlled energy consumption unbonded prestressed concrete frame that conforms to the concept of earthquake resistance. The bonded prestressed concrete structure has the advantages of good cracking and deformation resistance, light weight and simple construction, which creates a new way for the popularization and application of unbonded prestressed concrete frame structures in earthquake areas.

The technical solution adopted by the utility model is: an unbonded prestressed concrete frame utilizing energy consumption of anchor supports, including ordinary reinforced concrete columns and self-controlled energy consumption unbonded prestressed concrete beams;

The ordinary reinforced concrete column is not provided with prestressed tendons, and the self-controlled energy-dissipating unbonded prestressed concrete beam includes self-controlled energy-dissipating elements, positioning steel bars, stirrups, unbonded prestressed tendons, beam upper steel bars, beam lower longitudinal The anchoring end of the tendon and the prestressed tendon; the unbonded prestressed tendon is arranged in a curved shape, the self-control energy dissipation element is arranged at the anchor support of the unbonded prestressed tendon, and the end of the unbonded prestressed tendon is connected to the The anchoring ends of the prestressed tendons are connected, the stirrups are arranged around the upper longitudinal reinforcement of the beam and the lower longitudinal reinforcement of the beam, the stirrups are welded to the positioning reinforcement, and the self-control energy dissipation elements are welded to the positioning reinforcement;

The self-control energy dissipation element includes a pressure bearing plate, a side baffle, a main body of the deformation box, an outer part of the deformation box and an inner part of the deformation box. The two sides of the main body of the deformation box are the outer part of the deformation box and the inner part of the deformation box. The lower edge of the side baffle is connected with building structural glue, and the upper edge of the side baffle is connected with the pressure plate through building structural glue.

Preferably, the stirrups are densely arranged at the end of the self-controlled energy-dissipating beam.

Preferably, the pressure bearing plate is a steel plate, the main body of the deformation box is made of carbon fiber plate members and carbon fiber cloth (the purpose of using carbon fiber materials in the deformation box is to increase strength and reduce weight), and the side baffles are made of wood make.

Beneficial effects: the utility model arranges an unbonded prestressed concrete frame with self-controlled energy-dissipating elements at the anchoring support of curved unbonded prestressed tendons, and the self-controlled energy-dissipating elements are in a dormant state under frequent earthquakes and moderate earthquakes; Under rare earthquakes, the bearing capacity of the self-controlled energy-dissipating elements reaches the threshold, and then starts and deforms, resulting in a decrease in the flexural bearing capacity of the frame beams and plastic hinges appearing in the beams before the columns. Under the earthquake, the frame dissipates the input energy of the earthquake through the rotation of the plastic hinge at the beam end, forming a beam-hinge mechanism. That is to say, under rare earthquakes, the beams are used to dissipate energy artificially to ensure less damage to the columns, which is in line with the seismic concept design. Since the stress of the prestressed tendons after the plastic hinge of the frame beam is much smaller than the ultimate stress, it can ensure that the prestressed tendons continue to play a role after the plastic hinge of the beam, thereby prolonging the length of the elastoplastic phase with constrained yield and forming a ductile frame.

Description of drawings

Fig. 1 is a schematic diagram of the frame structure of the present utility model;

Fig. 2 is the schematic diagram of the unbonded prestressed concrete beam utilizing the energy dissipation of the anchor support in the present invention;

Fig. 3 is a schematic diagram of installation of the self-control energy-consuming element of the utility model;

Fig. 4 is a partial enlarged view of the anchoring support in Fig. 3;

Fig. 5 is a sectional view of plane A-A in Fig. 3;

Figure 6 is a schematic diagram of the appearance of the self-control energy-consuming element of the present invention;

Fig. 7 is a schematic diagram of disassembly of the components of the self-control energy-consuming element of the present invention;

Fig. 8 is a schematic diagram of the function and effect of the self-control energy-consuming element of the present invention.

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1-7, the unbonded prestressed concrete frame using anchor support energy dissipation includes ordinary reinforced concrete columns 9 and self-controlled energy dissipation unbonded prestressed concrete beams 8, and the ordinary reinforced concrete columns 9 are not Prestressed tendons are set, and the self-controlled energy-dissipating unbonded prestressed concrete beam 8 includes self-controlled energy-dissipating elements 1, positioning steel bars 2, stirrups 3, unbonded prestressed tendons 4, beam upper longitudinal bars 5, and beam lower longitudinal bars. Rib 6 and prestressed tendon anchoring end 7;

The unbonded prestressed tendons 4 are arranged in a curved shape, the self-control energy dissipation element 1 is arranged at the anchor support of the unbonded prestressed tendons 4, and the ends of the unbonded prestressed tendons 4 are anchored to the prestressed tendons The end 7 is connected, the stirrups 3 are arranged around the longitudinal bars 5 at the upper part of the beam and the longitudinal bars 6 at the lower part of the beam, the stirrups 3 are welded with the positioning steel bars 2, and the positioning steel bars 2 of the self-control energy dissipation element 1 are welded;

The self-control energy dissipation element 1 deforms the outer part 11 of the deformation box, the deformation box main body 12, the deformation box inner part 10, the pressure bearing plate 13 and the side baffle 14, and the two sides of the deformation box main body 11 are the deformation box outer part 12 and the deformation box respectively. The inner part 10 of the deformation box, the deformation box main body 11 and the lower edge of the side baffle 14 are connected by building structural glue, and the upper edge of the side baffle 14 is connected with the pressure bearing plate 13 by building structural glue.

The stirrups 3 are densely arranged at the end of the self-controlled energy-dissipating beam. The pressure bearing plate 13 is made of steel plate, the deformation box main body 11 is made of carbon fiber plate member and carbon fiber cloth glued together (the purpose of adding carbon fiber material to the deformation box is to increase the strength and reduce the weight), and the side baffle 14 is made of Made of wooden boards, the side baffles are connected with the pressure-bearing plate and the main body of the deformation box through building structural glue.

In the self-controlled energy-dissipating unbonded prestressed concrete frame structure, the self-controlled energy-dissipating element is placed at the anchor support of the prestressed tendon in the beam, and the installation steps are as follows:

1. Binding non-prestressed longitudinal steel bars and stirrups;

2. Determine the position of the self-control energy-consuming element and determine the position of the positioning steel bar;

3. Encrypt the stirrup at the end of the self-control energy-dissipating beam as required;

4. Weld the positioning steel bars and stirrups, and weld the self-control energy-dissipating elements and positioning steel bars;

5. Arrange unbonded prestressed steel bars and finalize the shape.

Action and effect: As shown in Figure 8, the self-controlled energy-dissipating element plays a role, that is, the finite deformation box is destroyed, and the prestressed tendons are released.

The embodiments of the utility model have been described in detail above in conjunction with the accompanying drawings, but the utility model is not limited to the described embodiments. For those of ordinary skill in the art, within the scope of the principles and technical ideas of the present utility model, various changes, modifications, replacements and deformations to these embodiments still fall within the protection scope of the present utility model.

Claims (3)

1. a kind of unbonded prestressed reinforced concrete frame to be consumed energy using anchorage bearing, it is characterised in that：It is mixed including regular reinforcement Solidifying earth pillar and automatic control energy consumption no-bonding pre-stress concrete beam；

The ordinary reinforced concrete column does not set presstressed reinforcing steel, and the automatic control energy consumption no-bonding pre-stress concrete beam includes automatic control Muscle and presstressed reinforcing steel anchored end are indulged in dissipative cell, spacer bar, stirrup, unbonded prestressing tendon, beam upper reinforcement, beam lower part； The unbonded prestressing tendon arranges that the automatic control dissipative cell is set to unbonded prestressing tendon anchorage bearing for curved shape Place, the end of unbonded prestressing tendon are connect with presstressed reinforcing steel anchored end, and the stirrup is vertical around beam upper longitudinal bar and beam lower part Muscle is arranged, and stirrup is welded with spacer bar, and automatic control dissipative cell is welded with spacer bar；

The automatic control dissipative cell includes bearing plate, side shield, deformation box main body, deformation box exterior portion and deformation box inside portion Point, the deformation box main body both sides are deformation box exterior portion and deformation box inboard portion, are deformed under box main body and side shield Edge passes through building structure glue connection by building structure glue connection, top edge and the bearing plate of the side shield.

2. the unbonded prestressed reinforced concrete frame according to claim 1 to be consumed energy using anchorage bearing, it is characterised in that： The stirrup is encrypted in automatic control dissipative links end to be arranged.

3. the unbonded prestressed reinforced concrete frame according to claim 1 to be consumed energy using anchorage bearing, it is characterised in that： The bearing plate is steel plate, and the deformation box main body is that carbon fiber board component and carbon cloth gluing form, and the side shield is adopted It is made of plank.