CN105525679B - A kind of local prestressing force assembled energy-dissipation beam column node - Google Patents

A kind of local prestressing force assembled energy-dissipation beam column node Download PDF

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Publication number
CN105525679B
CN105525679B CN201610044530.5A CN201610044530A CN105525679B CN 105525679 B CN105525679 B CN 105525679B CN 201610044530 A CN201610044530 A CN 201610044530A CN 105525679 B CN105525679 B CN 105525679B
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CN
China
Prior art keywords
precast concrete
concrete
column
bracket
presstressed reinforcing
Prior art date
Application number
CN201610044530.5A
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Chinese (zh)
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CN105525679A (en
Inventor
郭正兴
管东芝
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东南大学
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Priority to CN201610044530.5A priority Critical patent/CN105525679B/en
Publication of CN105525679A publication Critical patent/CN105525679A/en
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Publication of CN105525679B publication Critical patent/CN105525679B/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21Connections specially adapted therefor
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/21Connections specially adapted therefor
    • E04B1/215Connections specially adapted therefor comprising metallic plates or parts
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/20Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
    • E04B1/22Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material with parts being prestressed

Abstract

The invention discloses a kind of local prestressing force assembled energy-dissipation beam column node, including precast concrete column, precast concrete beam, replaceable power consumption rod, presstressed reinforcing steel, anchorage;The precast concrete column reserves presstressed reinforcing steel duct and bracket in node district;The precast concrete beam is that presstressed reinforcing steel duct is provided with the middle of pretensioned prestressed concrete girder, beam-ends section, and beam-ends bottom is provided with tongue and groove;The precast concrete beam is shelved on the bracket, is crimped and fixed by local post-tensioned prestressing muscle, upper surface cast-in-place concrete in FFL;The replaceable power consumption rod is installed on the precast concrete beam upper and lower surface, and quantity, specification and effect opportunity are designed according to different anti-seismic grade, during positioned at lower surface, and through the preformed hole of the bracket, exposed portion is coated by mortar.The present invention improves restorability of the precast concrete framework under earthquake, enhances energy dissipation capacity, realizes classification damping power consumption, is easy to repair after shake.

Description

A kind of local prestressing force assembled energy-dissipation beam column node

Technical field

The present invention relates to a kind of prestressing force assembled energy-dissipation beam column node, belong to building engineering field.

Background technology

Precast Concrete Frame can greatly improve construction ability and construction speed, save a large amount of labours, ensure Build guality, and be conducive to reaching the requirement of " environmental protection of four section one ", go into overdrive to carry out " building industrialization, house in country Industrialization ", promoting has good development prospect under the background of green building and green construction.For from structural behaviour, in advance The beam-column connection of concrete frame structure processed is related to the anti-seismic performance of total, and conventional structure earthquake shows that beam column connects Connecing destruction of a node and often turning into causes the main cause of structural failure, therefore precast concrete beam-column connection is precast concrete Frame structure is able to wide variety of key.

Prestressed concrete can preferably play the advantage that precast concrete factorial praluction and assembled are installed, and in advance should The connection of power prepressing type can provide good restorability, be easy to the reparation after earthquake disaster, obtained extensive attention.However, Using form of the presstressed reinforcing steel along the elongated arrangement of precast beam, prestressing force pulling force the prefabricated beam-to-column joint of routine prepressing type at present more Height, presstressed reinforcing steel perforation workload is big, and post-tensioned prestressing significantly affects the holistic resistant behavior of precast beam.

Prestressing force prefabrication and assembly construction concrete structure, due to there is presstressed reinforcing steel, with higher recoverable force ability, but consumes Energy ability is weaker, it is necessary to which passing through corresponding measure increases energy dissipation capacity.The energy dissipation capacity of general dissipative cell can only be often directed to Clear and definite single seismic behavior is designed, and is not often worked under the geological process less than the rank.

The content of the invention

It is an object of the invention to propose a kind of local prestressing force assembled energy-dissipation beam column node, improve precast prestressed mixed The advantage of solidifying soil frame structure, the restorability for keeping the prefabricated bean column node of precompressed stronger, while reducing post-tensioned prestressing muscle pair Integrally-built influence, the energy dissipation capacity of enhancing structure realizes classification damping, and is easy to repair after shake.

The technical solution adopted by the present invention is:A kind of local prestressing force assembled energy-dissipation beam column node, including concrete Earth pillar, precast concrete beam, presstressed reinforcing steel, prestressed anchor and replaceable power consumption rod;

The precast concrete column reserves presstressed reinforcing steel duct and bracket in beam-to-column joint area, and the bracket is described removable Change power consumption rod installed position reserving hole channel, for through the replaceable consume energy rod;

The precast concrete beam is pretensioned prestressed concrete girder, and it is pre- that section upper and lower part requires that setting is first opened according to calculating Stress rib, is made by long line method pedestal, plays the advantage of long line method prestressed component production;The precast concrete beam end Reserved prestressed pore passage, in the middle of beam section height, is symmetrically arranged;Its length is entered according to the deformation requirements of presstressed reinforcing steel Row reasonable computation;The presstressed reinforcing steel duct afterbody is bent to beam sides, reserves tension of prestressed tendon and anchoring space;It is described pre- Leave bracket tongue and groove in beams of concrete end processed section bottom;

The precast concrete beam ends rest is on the bracket of the precast concrete column;The presstressed reinforcing steel passes through institute The presstressed reinforcing steel duct of precast concrete column and the precast concrete beam end is stated, the two is crimped into by post-tensioned prestressing One;The presstressed reinforcing steel two ends are anchored by the anchorage;The precast concrete beam upper surface is in FFL model Enclose interior overlapping cast-in-place concrete;

The replaceable power consumption rod is used to strengthen the energy dissipation capacity of node of the present invention, is installed on the precast concrete beam Lower surface, one end connects the precast concrete column, other end connection precast concrete beam.

Preferably, setting pressure-bearing end plate at the bracket tongue and groove position, and encrypt at bracket tongue and groove and neighbouring position Stirrup, operative constraint beam-ends concrete, it is ensured that beam-ends is destroyed under geological process smaller not to be destroyed even.

Preferably, when the replaceable power consumption rod is located at the precast concrete beam upper surface, being poured in cast-in-place mixed In solidifying soil, during positioned at lower surface, through the preformed hole of the bracket, exposed portion is coated by mortar.The replaceable power consumption Rod can be installed on the precast concrete upper and lower surface using the replaceable power consumption groups of form of rod of multiple different sizes, Surrender power consumption is successively hierarchically played a part of according to different anti-seismic grade.

Preferably, the replaceable power consumption rod includes mild steel bar, anti-buckling sleeve, anchoring sleeve, nut and fixed iron Part;The anti-surrender sleeve is enclosed in the mild steel bar;The anchoring sleeve is embedded in precast concrete column in advance, and one end is provided with interior Screw thread, the screw thread of its size and the mild steel bar matches, and the other end is provided with orthogonal hole, through two horizontal rod irons, For strengthening anchoring ability;The fixing iron member is embedded in precast prestressed concrete beam end upper and lower surface in advance;The mild steel bar one End is provided with short thread segments, and the other end sets long thread segment, is threaded through rolling and is formed so that thread segment intensity is higher than normal reach;It is short The end of thread is screwed into the anchoring sleeve, and the long end of thread is connected on the fixing iron member by two nuts.

Preferably, the fixing iron member includes angle bar, shear connector and ribbed stiffener, U-shaped breach is left in the angle bar side, Gap width is more than the mild steel bar diameter, less than the nut size;The shear connector is welded in the angle bar opposite side bottom Face;The shear connector is embedded among precast concrete;The ribbed stiffener is welded in two ends on the inside of angle bar.

Preferably, the anti-surrender sleeve is made up of smooth bar pipe, internal diameter is more than the mild steel bar diameter 1-5mm, The mild steel bar is made of low surrender steel, and the quantity of the nut is 2-4, close to two nuts of the fixing iron member At the U-shaped breach that the fixing iron member can be clamped, can also preset clearance, gap length is according to the effect of different anti-seismic grade Opportunity is designed.

Beneficial effect:

(1) present invention uses pre-tensioning system precast concrete beam, by post-tensioned prestressing by precast concrete beam and prefabricated post It is crimped together, forms effective dry type and connect integral, reduce wet trade, improve field erected efficiency, improve construction Speed.

(2) beam-ends of the present invention has carried out reinforcement processing, under geological process, and destruction is slight, and in prefabricated beam-ends centre bit Put place and be provided with post-tensioned prestressing muscle connection prefabricated post, after geological process, with preferable restorability, be easy to rapid after shake Repair, recover to use.

(3) post-tensioned prestressing muscle of the present invention is only arranged at prefabricated beam-ends, and length can be designed according to malformation requirement, With higher flexibility, post-tensioned prestressing is reduced on integrally-built influence, consumption and the posttension of presstressed reinforcing steel is reduced The perforation workload of presstressed reinforcing steel, reduces cost.

(4) present invention installs anti-buckling energy-consumption rod in node bonding pad, improves the energy dissipation capacity of structure, quantity, specification It can be designed with effect opportunity according to different anti-seismic grade, realize classification antidetonation, it is convenient, flexible.The power consumption rod can be dismounted, Processing is conveniently replaceable, is repaired beneficial to after shake.

Brief description of the drawings

Fig. 1 is precast concrete beam schematic diagram of the invention;

Fig. 2 is Fig. 1 sectional view;

Fig. 3 is prestressing force assembled energy-dissipation beam column node schematic diagram of the invention;

Fig. 4 is Fig. 3 top view;

Fig. 5 is replaceable power consumption rod schematic diagram of the invention;

Fig. 6 is fixing iron member schematic diagram of the invention;

Fig. 7 is anchoring sleeve schematic diagram of the invention.

Embodiment

The present invention will be further described with reference to the accompanying drawings and detailed description.

As Figure 1-4:The section upper and lower part of precast concrete beam 1 sets pre-tensioned prestressing muscle according to requirement is calculated 2, made by long line method pedestal;Beam end depth of section leaves presstressed reinforcing steel duct 3 on centre position, is symmetrically arranged, Its length carries out reasonable computation according to the deformation requirements of presstressed reinforcing steel;The afterbody of presstressed reinforcing steel duct 3 is bent to beam sides, is reserved pre- Stress rib tensioning and anchoring space 4.Leave setting pressure-bearing end plate at bracket tongue and groove 5, bracket tongue and groove position in beam end section bottom 6, and encrypt the stirrup 7 at bracket tongue and groove and neighbouring position;Fixing iron member 9 for fixing replaceable power consumption rod 8 is embedded in advance The upper and lower surface of precast concrete beam 1.

Precast concrete column 10 reserves presstressed reinforcing steel duct 11 and bracket 12 in beam-to-column joint area, for connecting replaceable consumption The anchoring sleeve 13 of energy rod 8 is embedded on cylinder and bracket 12 in advance;Precast concrete beam 1 is held on the bracket of precast concrete column 10 On 12, presstressed reinforcing steel 14 passes through the presstressed reinforcing steel duct 11 of precast concrete column 10 and the prestressing force of the end of precast concrete beam 1 Muscle duct 3, then tensioned prestressing bar 14, are crimped precast concrete column 10 and precast concrete beam 1 by post-tensioned prestressing Integrally;The two ends of presstressed reinforcing steel 14 are anchored by prestressed anchor 15;Install removable in the upper and lower surface of precast concrete beam 1 Change power consumption rod 8;The upper surface of precast concrete beam 1 overlaps cast-in-place concrete 16 in the range of FFL;By mortar 17 by position The partial encapsulation that replaceable power consumption rod 8 in lower section exposes is in wherein.

As shown in Figure 5:Replaceable power consumption rod 8 is pacified using the groups of form of replaceable power consumption rod of multiple different sizes Loaded on the precast concrete upper and lower surface, surrender power consumption is successively hierarchically played a part of according to different anti-seismic grade;It is removable Power consumption rod 8 is changed by mild steel bar 18, anti-buckling sleeve 19, nut 20, anchoring sleeve 13 and fixing iron member 9 are constituted;Mild steel bar 18 is adopted It is made of low surrender steel, one end is provided with short thread segments, and the other end sets long thread segment, is threaded through rolling and is formed;Short thread end Anchoring sleeve 13 is screwed into, the long end of thread is connected on fixing iron member 9 by two nuts 20, can be as needed between two nuts 20 Clamp at the U-shaped breach of the fixing iron member or preset clearance, gap length enters according to the effect opportunity of different anti-seismic grade Row design;Anti-buckling sleeve 19 is made up of smooth bar pipe, and internal diameter is more than the mild steel bar diameter 1-5mm, is enclosed on mild steel bar 18 On;Anchoring sleeve 13 is embedded on the bracket 12 of precast concrete column 10 and precast concrete column in advance;Fixing iron member 9 is embedded in prefabricated in advance The end upper and lower surface of beams of concrete 1.

As shown in Figure 6:Fixing iron member 9 is made up of angle bar 21, shear connector 22 and ribbed stiffener 23.Leave U-shaped in the side of angle bar 21 Breach, gap width is more than the mild steel bar diameter, less than nut size;Shear connector 22 is welded in the opposite side bottom surface of angle bar 21, Shear connector 22 is embedded among precast concrete;Ribbed stiffener 23 is welded in the inner side two ends of angle bar 21.

As shown in Figure 7:The one end of anchoring sleeve 13 is provided with internal thread 24, and the screw thread of its size and mild steel bar 18 matches, separately One end is provided with orthogonal hole, through two horizontal rod irons 25, for strengthening anchoring ability.

When replaceable power consumption rod 8 is installed, anti-buckling sleeve 19 is placed in mild steel bar 18 first, nut 20 is arranged on mild steel The long end of thread of rod 18, then sticks into the U-shaped breach of fixing iron member 9 by the long end of thread of mild steel bar 18, and short thread end is screwed into anchor Gu sleeve 13, finally tightens nut 20, or preset clearance;Demolishing process is opposite with installation process.

It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, Some improvements and modifications can also be made, these improvements and modifications also should be regarded as protection scope of the present invention.In the present embodiment not Clear and definite each part can use prior art to be realized.

Claims (3)

1. a kind of local prestressing force assembled energy-dissipation beam column node, it is characterised in that:Including precast concrete column, precast concrete Beam, presstressed reinforcing steel, prestressed anchor and replaceable power consumption rod;
The precast concrete column reserves presstressed reinforcing steel duct and bracket in beam-to-column joint area, and the bracket consumes in the replaceable Can rod installed position reserving hole channel, for through the replaceable consume energy rod;
The precast concrete beam is pretensioned prestressed concrete girder, and section upper and lower part sets pre-tensioned prestressing muscle;It is described prefabricated Prestressed pore passage is reserved in beams of concrete end, in the middle of beam section height, is symmetrically arranged;The presstressed reinforcing steel duct tail Portion is bent to beam sides, reserves tension of prestressed tendon and anchoring space;Leave ox in the precast concrete beam end cross-sectional bottom Leg tongue and groove;
The precast concrete beam ends rest is on the bracket of the precast concrete column;The presstressed reinforcing steel passes through described pre- The presstressed reinforcing steel duct of concrete column processed and the precast concrete beam end, one is crimped into by post-tensioned prestressing by the two Body;The presstressed reinforcing steel two ends are anchored by the anchorage;The precast concrete beam upper surface is in FFL scope Interior overlapping cast-in-place concrete;
The replaceable power consumption rod is installed on the precast concrete beam upper and lower surface, and one end connects the precast concrete column, The other end connects precast concrete beam;
Pressure-bearing end plate is set at the bracket tongue and groove position, and encrypts the stirrup at bracket tongue and groove and neighbouring position;
When the replaceable power consumption rod is located at the precast concrete beam upper surface, poured in cast-in-place concrete, under being located at During surface, through the preformed hole of the bracket, exposed portion is coated by mortar;
The replaceable power consumption rod includes mild steel bar, anti-buckling sleeve, anchoring sleeve, nut and fixing iron member;The anti-surrender Sleeve is enclosed in the mild steel bar;The anchoring sleeve is embedded in precast concrete column in advance, one end be provided with internal thread, its size with The screw thread of the mild steel bar matches, and the other end is provided with orthogonal hole, through two horizontal rod irons;The fixing iron member is pre- It is embedded in precast prestressed concrete beam end upper and lower surface;Described mild steel bar one end is provided with short thread segments, and the other end sets long thread segment, It is threaded through rolling to be formed so that thread segment intensity is higher than normal reach;Short thread end is screwed into the anchoring sleeve, and the long end of thread leads to Two nuts are crossed to be connected on the fixing iron member.
2. a kind of local prestressing force assembled energy-dissipation beam column node according to claim 1, it is characterised in that:The fixation Ironware includes angle bar, shear connector and ribbed stiffener, and U-shaped breach is left in the angle bar side, and it is straight that gap width is more than the mild steel bar Footpath, less than the nut size;The shear connector is welded in the angle bar opposite side bottom surface;The shear connector is embedded in concrete Among soil;The ribbed stiffener is welded in two ends on the inside of angle bar.
3. a kind of local prestressing force assembled energy-dissipation beam column node according to claim 1, it is characterised in that:It is described anti-in the wrong Take sleeve to be made up of smooth bar pipe, internal diameter is more than the mild steel bar diameter 1-5mm, and the mild steel bar is using low surrender steel system Into the quantity of the nut is 2-4, and two nuts close to the fixing iron member clamp the U-shaped breach of the fixing iron member Place or preset clearance.
CN201610044530.5A 2016-01-21 2016-01-21 A kind of local prestressing force assembled energy-dissipation beam column node CN105525679B (en)

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CN105863046A (en) * 2016-05-05 2016-08-17 四川省第四建筑工程公司 Prefabricated assembly type beam column joint connecting process
CN105839775A (en) * 2016-05-24 2016-08-10 东南大学 Beam end crossed arc-shaped post-tensioned pre-stressed reinforcing steel dry-type assembling beam-column node
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CN106499051B (en) * 2016-11-21 2019-03-19 中国建筑股份有限公司 A kind of column perforation prefabricated PC concrete frame frame system and its construction method
CN108643669A (en) * 2018-04-13 2018-10-12 东南大学 It pushes up bottom and becomes friction energy-dissipating Self-resetting prestressed concrete beam Column border node device
CN108842911A (en) * 2018-05-31 2018-11-20 南京东南建筑机电抗震研究院有限公司 Assembled Self-resetting prestressed concrete frame SMA energy dissipation node
CN109113171A (en) * 2018-09-06 2019-01-01 同济大学 A kind of Novel bolt connection Precast Concrete Frame
CN109798011B (en) * 2019-03-06 2020-09-11 东南大学 Series disc spring large deformation energy consumption beam column node
CN110528689B (en) * 2019-09-10 2020-11-03 东南大学 Assembled beam column earthquake-resistant structure
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