CN105735469A - Partially-bonded precast prestressed concrete frame structure - Google Patents

Partially-bonded precast prestressed concrete frame structure Download PDF

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Publication number
CN105735469A
CN105735469A CN201610096784.1A CN201610096784A CN105735469A CN 105735469 A CN105735469 A CN 105735469A CN 201610096784 A CN201610096784 A CN 201610096784A CN 105735469 A CN105735469 A CN 105735469A
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China
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precast
concrete
precast concrete
prestressed
reinforcing steel
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CN201610096784.1A
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CN105735469B (en
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薛伟辰
胡翔
孙哲
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Tongji University
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Tongji University
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    • 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 relates to a partially-bonded precast prestressed concrete frame structure. The partially-bonded precast prestressed concrete frame structure is composed of prestressed tendons, precast concrete columns, precast concrete beams, precast concrete boards, post-poured concrete composite layers and post-poured concrete joint core areas. Carbon fiber reinforced plastic (CFRP) prestressed tendons are adopted as the prestressed tendons, and the prestressed tendons are distributed in a curve-shaped mode and constructed in a partially-bonded mode. The prestressed tendons are constructed through a post tension process and penetrate through the joint core areas. Lower longitudinal bars of every two adjacent precast concrete beams are connected through welding or a sleeve. Upper longitudinal bars of the precast concrete beams are arranged on the composite layers and bound on the site. A plurality of layers of precast columns are adopted for constructing the precast concrete columns. The precast concrete beams and the precast concrete columns are connected with the post-poured concrete joint core areas through the post-poured concrete composite layers. All the precast concrete columns, the precast concrete beams and the precast concrete boards in the partially-bonded precast prestressed concrete frame structure can be obtained through standardized production in a factory so that the effect that the partially-bonded precast prestressed concrete frame structure has good stress performance can be ensured, the partially-bonded precast prestressed concrete frame structure has the advantages of being simple in construction, high in construction speed and the like and has wide application prospects in the architectural engineering field.

Description

A kind of part adhesive precast prestressed concrete frame structure
Technical field
The invention belongs to technical field of civil engineering, be specifically related to a kind of part adhesive precast prestressed concrete frame structure.
Background technology
Precast prestressed frame structure means on the basis of Precast Concrete Frame, the structural system that node and Vierendeel girder Shi Hanzhang are formed.This frame structure system is capable of large span, and speed of application is fast, quality is good, can save template and support in a large number.It is a kind of meet industrialized development needs, energy-conservation with structure-integrated structural system can be realized.
Existing precast prestressed frame structure system has generation structure system, PRESSS system and subassemblage concrete frame structure system.Generation structure system is formed by connecting by cast-in-place concrete by precast concrete column, pretensioned prestressing composite beam, precast slab, and in this system, presstressed reinforcing steel does not pass through joint cores, is form integrated prestress system.PRESSS system adopts posttension unbonded prestressing tendon and regular reinforcement to be attached, and presstressed reinforcing steel is passed through the presstressed reinforcing steel duct that beam longitudinal central axis line position reserves and is linked together by the both sides crossbeam of post, and beam column seam fills mortar.The regular reinforcement duct that vertical muscle position is reserved up and down by beam is through pillar, and is in the milk in scene.This system presstressed reinforcing steel is in beam section intermediate arrangement, it is difficult to give full play to its contribution for structural bearing capacity.Additionally, the Approaches for Progressive Collapse of Structures that unbonded prestressing tendon Yi Fashengyin ground tackle destroys and causes.Subassemblage concrete frame structure system be by posttension, multistage, the straight-line prestressed Tension Forming of soap-free emulsion polymeization precast prestressed concrete frame structure.This system tensioning construction is complicated, the Approaches for Progressive Collapse of Structures that unbonded prestressing tendon Yi Fashengyin ground tackle destroys and causes.
For current precast prestressed concrete frame structure Problems existing, the present invention proposes a kind of precast prestressed frame system.This system is watered monoblock type and is connected after adopting, precast concrete beam, post, board member are formed by cast-in-place concrete and prestressing force and be reliably connected.The vertical muscle in the bottom of contiguous prefabricated beams of concrete is by welding or sleeve connection, and the upper longitudinal bar of precast concrete beam is arranged at overlapping layers on-the-spot colligation.Precast concrete column adopts multilamellar prefabricated post structure.Presstressed reinforcing steel adopts unbounded prestressed construction, and through joint cores.Presstressed reinforcing steel adopts carbon fibre reinforced plastic (CFRP) presstressed reinforcing steel, and according to design internal force, presstressed reinforcing steel is arranged as shaped form, to improve the application efficiency of presstressed reinforcing steel.Prestressing force adopts part adhesive structure, namely at the plastic bushing that in the region of node, presstressed reinforcing steel is overlapped embedded butter, treating that tension of prestressed tendon completes post-grouting, can be formed adjacent to node region be soap-free emulsion polymeization, other regions is that the part adhesive having bonding constructs.The series of experimental research that inventor completes shows that this structure combines soap-free emulsion polymeization and the advantage of the complete two kinds of adhesive forms that bond, and has relatively high-bearing capacity, improves again ductility and the deformability of structure simultaneously.
The part adhesive precast prestressed concrete frame structure that the present invention proposes has good anti-seismic performance, meets the development strategy of China's green building and industrialized building, has very wide application prospect.
Summary of the invention
It is an object of the invention to exploitation one and both met overall performance requirement, anti-seismic performance is good, meets indoor large space demand simultaneously, saves material, part adhesive precast prestressed concrete frame structure easily of constructing.
A kind of precast prestressed concrete frame structure adopting part adhesive that the present invention proposes, described frame structure is combined by several precast concrete column 2 and several precast concrete beams 3, also including presstressed reinforcing steel 1, rear pouring concrete overlapping layers 5 and rear pouring concrete joint cores 6, several precast concrete column 2 are connected with rear pouring concrete joint cores 6 by rear pouring concrete overlapping layers 5 with several precast concrete beams 3;Precast concrete beam 3 is provided with presstressed reinforcing steel 1, and described presstressed reinforcing steel 1 adopts unbounded prestressed to construct, and through rear pouring concrete joint cores 6;Presstressed reinforcing steel adopts curved configuration, to improve the application efficiency of presstressed reinforcing steel 1;Presstressed reinforcing steel 1 adopts part adhesive to construct, namely at the plastic bushing that in the region of rear pouring concrete joint cores 6, presstressed reinforcing steel 1 is overlapped embedded butter, treating that presstressed reinforcing steel 1 stretch-draw completes post-grouting, namely being formed in the region of rear pouring concrete joint cores 6 as soap-free emulsion polymeization, other regions is that the part adhesive having bonding constructs.
In the present invention, precast concrete column 2 adopts multicolumn to construct, precast concrete column adjacent in assembled process at the scene adopts staggered floor arrangement, thus longitudinal reinforcement reserved when can realize precast beam hoisted in position well and prefabricated post collide and cannot be in place problem.
In the present invention, in described multicolumn structure, the bottom surface being positioned at the precast concrete column on upper strata arranges grouting air slot, and stay at center and to set steam vent 10, in order to when building rear pouring concrete overlapping layers 5, the air of the precast concrete column bottom being positioned at upper strata is discharged by being embedded in the pvc pipe of this precast concrete column, grouting air slot cross section is triangle, base length is 15mm ~ 25mm, and height is 10mm ~ 15mm, and steam vent diameter is 10mm ~ 15mm.
The beneficial effects of the present invention is:
1, the precast prestressed concrete frame that the present invention proposes has speed of application soon, and environmental pollution is little, saves the advantage such as duration and template, meets the demand of housing industrialization.
2, experimental study shows, the precast prestressed concrete frame that the present invention proposes has good globality and anti-seismic performance.
3, in the present invention, presstressed reinforcing steel adopts part adhesive, it is possible in conjunction with the advantage of soap-free emulsion polymeization and the complete two kinds of adhesive forms that bond, has relatively high-bearing capacity, improves again ductility and the deformability of structure simultaneously.
4, in the present invention, prefabricated post adopts multicolumn structure, and adopts two-layer prefabrication solutions.At the scene in assembled process, adjacent multicolumn adopts staggered floor arrangement, thus reserve when can realize precast beam hoisted in position well lift one's head reinforcing bar collide with prefabricated post and cannot be in place problem.
5, in the present invention, grouting air slot is set in precast concrete column bottom surface, upper strata, and stays at center and set steam vent.In sleeve filling process, seat pulp layer air, through air slot, is entered pre-buried pvc pipe by central exhaust port, outside final discharge post.Experimental study shows, arranges grouting air slot and can effectively dredge gas, it is ensured that seat pulp layer grouting compaction rate.
Accompanying drawing explanation
Fig. 1 is that the present invention one two-layer two is across structural representation.
Fig. 2 is part adhesive precast prestressed concrete frame interior joint schematic diagram of the present invention.
Fig. 3 is part adhesive precast prestressed concrete combination beam schematic cross-section of the present invention.
Fig. 4 is part adhesive precast prestressed concrete column section schematic diagram of the present invention.
Fig. 5 is precast concrete column bottom surface, upper strata of the present invention grouting air slot schematic diagram.
Fig. 6 is part adhesive precast prestressed concrete frame assembly schematic diagram of the present invention.
Number in the figure: 1 is presstressed reinforcing steel, 2 is precast concrete column, and 3 is precast concrete beam, and 4 is precast slab, and 5 is rear pouring concrete overlapping layers, and 6 is rear pouring concrete joint cores, and 7 is grouting air slot, and 8 is steam vent.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
Embodiment 1:
Fig. 1 be a Pin two-layer two across precast prestressed concrete frame structure, in this structure, precast concrete column 2 and precast concrete beam 3 are connected by rear pouring concrete overlapping layers 5 and rear pouring concrete joint cores 6.Presstressed reinforcing steel 1 adopts part adhesive to construct, and in the form adopting soap-free emulsion polymeization near node region, remainder adopts, with concrete, the form having bonding.Presstressed reinforcing steel 1 arrangement of curves, linear for multistage parabola, arrange near tension edge at controlling sections place.
Fig. 2 is the precast prestressed concrete frame interior joint detail of construction, and precast concrete column 2 and precast concrete beam 3 are connected by rear pouring concrete overlapping layers 5 and rear pouring concrete joint cores 6.Presstressed reinforcing steel 1 adopts part adhesive, and in the form adopting soap-free emulsion polymeization near node region, remainder adopts, with concrete, the form having bonding.Presstressed reinforcing steel 1 arrangement of curves, linear for multistage parabola, arrange near tension edge at controlling sections place.The vertical muscle in the bottom of contiguous prefabricated beams of concrete is by welding or sleeve connection, and the upper longitudinal bar of precast concrete beam is arranged at rear pouring concrete overlapping layers 5 on-the-spot colligation;Precast concrete column 2 adopts multicolumn to construct.
Fig. 3 is the schematic cross-section of precast prestressed concrete composite beam, and the vertical muscle in the bottom of contiguous prefabricated beams of concrete 3 is by welding or sleeve connection, and the upper longitudinal bar of precast concrete beam 3 is arranged at rear pouring concrete overlapping layers 5 on-the-spot colligation.
Fig. 4 is the schematic cross-section of precast concrete column.
Fig. 5 is upper strata precast concrete column 2 bottom surface grouting air slot schematic diagram.Upper strata precast concrete column 2 bottom surface arranges grouting air slot 7, and stays at center and set steam vent 8, in order to precast concrete column 2 end air is discharged by the pvc pipe being embedded in precast concrete column 2.Grouting air slot 7 cross section is triangle, and base length is 15mm ~ 25mm, and height is 10mm ~ 15mm, and steam vent diameter is 10mm ~ 15mm.
Fig. 6 is part adhesive precast prestressed concrete frame structure assembly schematic diagram.Adjacent prefabricated laminated post adopts staggered floor assembling scheme, longitudinal reinforcement reserved in precast beam and prefabricated post can be avoided to collide and cause that precast beam cannot the problem of hoisted in position.
The manufacturing process of the present invention is as follows:
Set-up procedure: complete the making of precast concrete column, precast concrete beam, precast slab in precast concrete factory, and each component is numbered, transports to job site.
Work progress: a. is first in place by prefabricated post, installs some precast concrete column of adjacent pillars net, and precast concrete column adopts sleeve connection with basis;B. in the installation position completing precast concrete column, precast concrete beam is installed, on precast concrete beam is erected at precast concrete column and supports, and precast concrete beam is adjusted whose level, with precast concrete column centering;C. place precast slab, precoated plate is shelved on precast beam and. in support, control precoated plate and the lap of splice of precast beam, precoated plate overall dimensions;D. the vertical reinforcement at the bottom of the beam of butt welding joint cores, then colligation joint cores stirrup, core space precalculated position place metal bellows, the prestress wire of soap-free emulsion polymeization section is done soap-free emulsion polymeization process, wears distribution bar in prestress wire, colligation back longitudinal reinforcement, colligation superimposed sheet;E., joint cores template, cast in situs joint cores and overlapping layers are installed;F. when pouring concrete intensity reaches the 75% of design strength behind joint cores and overlapping layers, carry out steel strand tension, after steel strand tension to appointment stretching force, hold lotus and calculate ground tackle retraction value, then steel strand wires being carried out ultra stretching.After stretch-draw, carry out ground tackle slurry seal with plain concrete slurry, condense after hardening until plain concrete, be in the milk by reserved grout hole;G. the construction of precast prestressed frame structure can be completed by that analogy.

Claims (3)

1. the precast prestressed concrete frame structure adopting part adhesive, described frame structure is combined by several precast concrete column (2) and several precast concrete beams (3), also include presstressed reinforcing steel (1), rear pouring concrete overlapping layers (5) and rear pouring concrete joint cores (6), it is characterised in that: several precast concrete column (2) are connected with rear pouring concrete joint cores (6) by rear pouring concrete overlapping layers (5) with several precast concrete beams (3);Precast concrete beam (3) is provided with presstressed reinforcing steel (1), and described presstressed reinforcing steel (1) adopts unbounded prestressed construction the rear pouring concrete joint cores (6) of traverse;Presstressed reinforcing steel adopts curved configuration, to improve the application efficiency of presstressed reinforcing steel (1);Presstressed reinforcing steel (1) adopts part adhesive structure, namely at the plastic bushing that in the region of rear pouring concrete joint cores (6), presstressed reinforcing steel (1) is put embedded butter, treating that presstressed reinforcing steel (1) stretch-draw completes post-grouting, namely being formed in the region of rear pouring concrete joint cores (6) as soap-free emulsion polymeization, other regions is that the part adhesive having bonding constructs.
2. precast prestressed concrete frame according to claim 1, it is characterized in that precast concrete column (2) adopts multicolumn structure, precast concrete column adjacent in assembled process at the scene adopts staggered floor arrangement, thus longitudinal reinforcement reserved when can realize precast beam hoisted in position well and prefabricated post collide and cannot be in place problem.
3. precast prestressed concrete frame according to claim 2, it is characterized in that in described multicolumn structure, the bottom surface being positioned at the precast concrete column on upper strata arranges grouting air slot, and stay at center and to set steam vent (10), so that when building rear pouring concrete overlapping layers (5), the air of the precast concrete column bottom being positioned at upper strata is discharged by being embedded in the pvc pipe of this precast concrete column, grouting air slot cross section is triangle, base length is 15mm ~ 25mm, height is 10mm ~ 15mm, and steam vent diameter is 10mm ~ 15mm.
CN201610096784.1A 2016-02-23 2016-02-23 A kind of part adhesive precast prestressed concrete frame structure Active CN105735469B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106948481A (en) * 2017-05-02 2017-07-14 扬州大学 Prefabrication and assembly construction concrete frame beam-column connection based on the high strengthening tendons in part
CN107869116A (en) * 2017-10-19 2018-04-03 四川双铁科技有限公司 A kind of light-weight thermal-insulating and sound-insulating batten and preparation method thereof
WO2019056716A1 (en) * 2017-09-21 2019-03-28 中国建筑股份有限公司 Fully-assembled prestress concrete frame anti-seismic energy dissipation member system and construction method
CN109868940A (en) * 2017-12-05 2019-06-11 上海同吉建筑工程设计有限公司 Post-tensioning has the total tension prestress concrete composite beam and its design, construction method of bonding
CN109868938A (en) * 2017-12-05 2019-06-11 上海同吉建筑工程设计有限公司 The total tension prestress concrete composite beam and its design, construction method of post-tensioning soap-free emulsion polymeization
CN109868935A (en) * 2017-12-05 2019-06-11 上海同吉建筑工程设计有限公司 Post-tensioning has the prestressed concrete superposed beam and its design, construction method of bonding
CN109989478A (en) * 2019-02-22 2019-07-09 同济大学 A kind of precast prestressed concrete frame structure
CN110206143A (en) * 2019-05-10 2019-09-06 中建八局第二建设有限公司 A kind of construction method of post-stressed assembly concrete frame structure

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106948481A (en) * 2017-05-02 2017-07-14 扬州大学 Prefabrication and assembly construction concrete frame beam-column connection based on the high strengthening tendons in part
CN106948481B (en) * 2017-05-02 2019-05-07 扬州大学 Prefabrication and assembly construction concrete frame beam-column connection based on the high strengthening tendons in part
WO2019056716A1 (en) * 2017-09-21 2019-03-28 中国建筑股份有限公司 Fully-assembled prestress concrete frame anti-seismic energy dissipation member system and construction method
CN107869116A (en) * 2017-10-19 2018-04-03 四川双铁科技有限公司 A kind of light-weight thermal-insulating and sound-insulating batten and preparation method thereof
CN109868940A (en) * 2017-12-05 2019-06-11 上海同吉建筑工程设计有限公司 Post-tensioning has the total tension prestress concrete composite beam and its design, construction method of bonding
CN109868938A (en) * 2017-12-05 2019-06-11 上海同吉建筑工程设计有限公司 The total tension prestress concrete composite beam and its design, construction method of post-tensioning soap-free emulsion polymeization
CN109868935A (en) * 2017-12-05 2019-06-11 上海同吉建筑工程设计有限公司 Post-tensioning has the prestressed concrete superposed beam and its design, construction method of bonding
CN109989478A (en) * 2019-02-22 2019-07-09 同济大学 A kind of precast prestressed concrete frame structure
CN110206143A (en) * 2019-05-10 2019-09-06 中建八局第二建设有限公司 A kind of construction method of post-stressed assembly concrete frame structure

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