CN218643524U - Assembled UHPC precast beam post-cast cavity integral connecting structure - Google Patents
Assembled UHPC precast beam post-cast cavity integral connecting structure Download PDFInfo
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- CN218643524U CN218643524U CN202223181257.0U CN202223181257U CN218643524U CN 218643524 U CN218643524 U CN 218643524U CN 202223181257 U CN202223181257 U CN 202223181257U CN 218643524 U CN218643524 U CN 218643524U
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Abstract
The utility model provides an assembled UHPC precast beam post waters integral connection structure of cavity, belongs to structural engineering technical field, including cast-in-place concrete frame post, I shape UHPC precast frame roof beam and U type UHPC precast frame roof beam, I shape UHPC precast frame roof beam and rectangular concrete frame post once only water the fashioned mode simultaneously through beam-ends variable cross section transition cavity and post core area concrete, have realized the reliable connection between I shape UHPC precast frame roof beam and the cast-in-place frame post. The invention has good integrity, high safety, excellent mechanical property and excellent anti-seismic property; the connection construction method is simple and feasible, saves construction cost, shortens construction period, ensures construction quality, obviously improves the industrialization efficiency of the fabricated building, and can realize generalization and standardization. Meanwhile, the novel UHPC material is innovatively applied to a concrete assembled structure system, and the development of a modern assembled structure is powerfully promoted.
Description
Technical Field
The utility model belongs to the technical field of structural engineering, concretely relates to integral connection structure of cavity waters behind assembled UHPC precast beam post, especially relates to assembled variable cross section UHPC precast beam and cast-in-place post nodal connection's design, all can use in assembled concrete frame structure system.
Background
The scale of infrastructure construction in China is huge, the construction scale exceeds the total construction scale of all countries in the world every year, and the traditional construction mode has the defects of high labor intensity, serious environmental pollution, high energy consumption, laggard construction mode and the like. The building industrialization is promoted, firstly, the factory and assembly are developed, and the prefabricated concrete structural member is very beneficial to prefabricated production and assembly construction. The industrial production and the assembly construction meet the requirements of the national construction industry from extensive transformation to fine transformation, and in recent years, the nation vigorously supports assembly type buildings and a series of policies and schemes are continuously provided. The provinces and the cities respond to the government calls vigorously, the countries and the places have exported relevant execution methods, and corresponding requirements and planning are made on prefabrication rate and assembly rate. Based on relevant requirements and policies, fabricated projects begin to emerge across the country.
The key part of the system formed by the assembled connecting nodes is the core stress part of the structure and is also the key weak link of the structure. For the precast concrete structure, the shear resistance and the ductility of the joint of the precast structure are crossed, which is easy to threaten the safety of the whole structure. Whether the connection quality of the components can be ensured is the key point of whether the whole structure can play the design function.
The defects of the existing connection form of the prefabricated components become one of the main factors directly restricting the popularization and the application of the assembly type Concrete frame structure, and the application of Ultra-high performance Concrete (UHPC) to the component connection of the assembly type Concrete frame structure can greatly reduce node reinforcement, simplify construction and control cost, and open up a new idea for solving the problem of the component connection of the assembly type Concrete frame structure.
The conventional method for connecting the nodes of the UHPC precast beam and the cast-in-place column in the fabricated structure is to connect the cast-in-place column and a precast beam embedded part and use the cast-in-place column and the precast beam embedded part as a connecting piece for steel conversion. The node connection technology is complex, and the conversion form of the node connection technology causes that the conversion between materials has poor isotropy. The steel plug-in components are embedded in the concrete, and a stress system is very complicated at the joint of the steel and the concrete. The joint is a stubble-aligning section, and the connection is only by a connecting piece to resist shearing, tension and bending.
In view of the problems of the prior assembled connection node, the improvement is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem: aiming at the problems in the prior art, the integral connecting structure of the post-cast cavity of the assembled UHPC precast beam column is provided, so that the reliable connection between the I-shaped UHPC precast beam and the cast-in-place frame column is realized; the utility model has good integrity, high safety, excellent mechanical property and excellent anti-seismic property; the connection construction is simple and feasible, the construction cost is saved, the construction period is shortened, the construction quality is ensured, the industrialization efficiency is obviously improved, and the generalization and standardization can be realized.
The utility model adopts the technical proposal that: the integral connecting structure comprises a cast-in-place concrete frame column, an I-shaped UHPC prefabricated frame beam and a U-shaped UHPC prefabricated frame beam, wherein one opposite two sides of the set height of the cast-in-place concrete frame column are horizontally and fixedly connected with the I-shaped UHPC prefabricated frame beam, the other opposite two sides of the set height of the cast-in-place concrete frame column are horizontally and fixedly connected with the U-shaped UHPC prefabricated frame beam, one end of the I-shaped UHPC prefabricated frame beam, which is connected with the cast-in-place concrete frame column, is a prefabricated frame beam connecting section, a beam end variable cross section post-casting connecting cavity is arranged in the prefabricated frame beam connecting section, and the end of the beam end variable cross section post-casting connecting cavity and a core area of the cast-in-place concrete frame column are fused after concrete casting to form a one-step integral cast-in-place concrete connecting node.
The technical scheme is further limited, the I-shaped UHPC prefabricated frame beam main body is an I-shaped UHPC prefabricated beam, the section of one end, connected with the cast-in-place concrete frame column, of the I-shaped UHPC prefabricated beam is of a rectangular structure and forms a prefabricated frame beam connecting section, a beam end variable-section post-cast connecting cavity in the prefabricated frame beam connecting section is a UHPC prefabricated beam end rectangular cavity, a rectangular reserved post-cast gate is arranged at the upper part of the UHPC prefabricated beam end rectangular cavity, the prefabricated frame beam connecting section and the I-shaped UHPC prefabricated frame beam are in transition connection through an I-shaped UHPC prefabricated frame beam variable-web plate section, and a girder V-shaped cavity communicated with the beam end variable-section post-cast connecting cavity is arranged in the I-shaped UHPC prefabricated frame beam variable-web plate section; reinforcing steel bars are distributed in the cast-in-place concrete frame column, beam hogging moment reinforcing steel bars needed by structural calculation are arranged on the upper portion of the I-shaped UHPC prefabricated frame beam before pouring and connecting, and the beam hogging moment reinforcing steel bars horizontally move to the hogging moment range of the connecting position of the beam hogging moment reinforcing steel bars and the cast-in-place concrete frame column.
The technical scheme is further limited, and the total length range of the beam end variable cross section post-cast connection cavity is a shearing range.
The utility model has the advantages compared with the prior art:
in the scheme, the integral post-cast connecting structure of the assembled UHPC precast beam and the variable cross-section cavity of the cast-in-place column comprises the following steps: (1) the integrity of the connection of the UHPC precast beam and the cast-in-place column node is improved, and the safety of the node is ensured by the cavity connection; (2) the V-shaped cavity of the ultra high performance concrete beam enables the UHPC precast beam to form a variable cross section, and the rigidity of a node shear area is greatly enhanced. The two points enable the cable to have excellent mechanical properties, good reliability, high safety, excellent mechanical properties, excellent earthquake resistance and easy transportation and storage. The node has simple structure and is easy for factory standardized production; the construction flexibility is higher, the connection construction is simple and feasible, the construction cost is saved, the construction period is shortened, and the construction quality is ensured; the method is favorable for promoting the building assembly development, improving the assembly rate, meeting the assembly rate requirement, obviously improving the industrialization efficiency, realizing the generalization and standardization and being convenient for popularization and application.
Drawings
FIG. 1 is a schematic view of a middle beam-column joint structure of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1 in accordance with the present invention;
fig. 4 is a cross-sectional view taken along line C-C of fig. 1 according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. The term "comprising", without further limitation, means that the element so defined is not excluded from the group consisting of additional identical elements in the process, method, article, or apparatus that comprises the element.
Referring to fig. 1-4, embodiments of the present invention are detailed.
The utility model provides an assembled UHPC precast beam post-cast cavity integral connection structure, includes cast-in-place concrete frame post 1, I shape UHPC precast frame roof beam 2 and U type UHPC precast frame roof beam 3, the equal horizontally fixedly connected with I shape UHPC precast frame roof beam 2 of the equal both sides of a set height of cast-in-place concrete frame post 1, the equal horizontally fixedly connected with U type UHPC precast frame roof beam 3 of the equal both sides of the set height of cast-in-place concrete frame post 1.
Specifically, as shown in fig. 1 to 4, one end of the i-shaped UHPC prefabricated frame beam 2, which is connected with the cast-in-place concrete frame column 1, is a prefabricated frame beam connecting section 2-2, a beam end variable cross-section post-cast connecting cavity 2-3 is arranged inside the prefabricated frame beam connecting section 2-2, and the end of the beam end variable cross-section post-cast connecting cavity 2-3 and a core area of the cast-in-place concrete frame column 1 are fused after concrete is cast in place to form a one-time integral cast-in-place concrete connecting node 2-7.
The main body of the I-shaped UHPC prefabricated frame beam 2 is an I-shaped UHPC prefabricated beam 2-1, the section of one end, connected with the cast-in-place concrete frame column 1, of the I-shaped UHPC prefabricated beam 2-1 is of a rectangular structure and forms a prefabricated frame beam connecting section 2-2, a beam end variable-section post-cast connecting cavity 2-3 in the prefabricated frame beam connecting section 2-2 is a UHPC prefabricated beam end rectangular cavity, a rectangular reserved post-cast gate 2-4 is arranged at the upper part of the UHPC prefabricated beam end rectangular cavity, the prefabricated frame beam connecting section 2-2 is in transitional connection with the I-shaped UHPC prefabricated frame beam through an I-shaped UHPC prefabricated frame beam variable-section 2-5, and a main beam V-shaped cavity 2-6 communicated with the beam end variable-section post-cast connecting cavity 2-3 is arranged in the I-shaped UHPC prefabricated frame beam variable-section 2-5; reinforcing steel bars are distributed in the cast-in-place concrete frame column 1, beam hogging moment reinforcing steel bars needed by structural calculation are arranged on the upper portion of the I-shaped UHPC prefabricated frame beam 2 before pouring and connecting, and the beam hogging moment reinforcing steel bars horizontally move to the hogging moment range of the connecting position of the beam hogging moment reinforcing steel bars and the cast-in-place concrete frame column 1.
The total length range of the beam end variable cross section post-cast connection cavity 2-3 is a shearing range. The stirrups in the range are encrypted according to the specification, and meanwhile, the section of the root of the node is most disadvantageously stressed, so that the section is arranged as a cavity for cast-in-place. According to the structure, the cavity is formed by combining the rectangular main beam cavity and the V-shaped main beam cavity 2-6, so that the I-shaped UHPC prefabricated frame beam 2 forms a variable-section beam, the mechanical property of the most unfavorable stress section of the node root is better, and the rest beam sections are more economical.
A construction method of an assembled UHPC precast beam column post-cast cavity integral connecting structure comprises the following steps:
step 1): firstly, a steel mould of a cast-in-place concrete frame column 1 is supported, and a communicating hole which is connected with a beam-end variable-section post-cast connecting cavity 2-3 is reserved at the joint of the steel mould of the cast-in-place concrete frame column 1 and an I-shaped UHPC prefabricated frame beam 2;
step 2): placing the steel bars of the cast-in-place concrete frame column 1;
step 3): the I-shaped UHPC prefabricated frame beam 2 is prefabricated in advance, and a beam end variable cross-section post-cast connecting cavity 2-3 with a transition effect is reserved in a prefabricated frame beam connecting section 2-2 connected with a cast-in-place concrete frame column 1 during manufacturing; hoisting an I-shaped UHPC prefabricated frame beam 2 to the joint of the I-shaped UHPC prefabricated frame beam 2 and a cast-in-place concrete frame column 1, enabling a beam end variable cross section post-pouring connecting cavity 2-3 in a prefabricated frame beam connecting section 2-2 of the I-shaped UHPC prefabricated frame beam 2 to correspond to a communication hole reserved on a steel mould of the cast-in-place concrete frame column 1, and performing temporary support on the I-shaped UHPC prefabricated frame beam 2 after alignment;
step 4): horizontally moving beam hogging moment reinforcing steel bars at the upper part of the I-shaped UHPC prefabricated frame beam 2 to a hogging moment range, and binding and fixing;
and step 5): and pouring a concrete area of a core area of the cast-in-place concrete frame column 1, performing concrete cast-in-place on a beam end variable cross section post-pouring connecting cavity 2-3 at the end part of the I-shaped UHPC prefabricated frame beam 2 through a rectangular reserved post-pouring gate 2-4, and circulating and fusing cast-in-place concrete in the beam end variable cross section post-pouring connecting cavity 2-3 and cast-in-place concrete of the core area of the cast-in-place concrete frame column 1 through a communicating hole reserved on a steel mould of the cast-in-place concrete frame column 1 to form a one-step integral cast-in-place concrete connecting node 2-7.
The integrated post-pouring connecting structure of the assembled UHPC precast beam and the variable cross-section cavity of the cast-in-place column and the construction method comprise the following steps: (1) the connection integrity of the UHPC precast beam and the cast-in-place column node is improved, and the safety of the node is ensured by the cavity connection; (2) the V-shaped cavity of the ultra high performance concrete beam enables the UHPC precast beam to form a variable cross section, and the rigidity of a node shear area is greatly enhanced. The two points enable the cable to have excellent mechanical properties, good reliability, high safety degree, excellent mechanical properties, excellent seismic performance and easy transportation and storage. The node has simple structure and is easy for factory standardized production; the construction flexibility is higher, the connection construction is simple and feasible, the construction cost is saved, the construction period is shortened, and the construction quality is ensured; the method is beneficial to promoting the building assembly development, improving the assembly rate, meeting the assembly rate requirement, obviously improving the industrialization efficiency, realizing the universalization and standardization and facilitating the popularization and application.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. The utility model provides an integral connection structure of assembled UHPC precast beam post-cast cavity, includes cast in situ concrete frame post (1), I shape UHPC precast frame roof beam (2) and U type UHPC precast frame roof beam (3), cast in situ concrete frame post (1) sets for equal horizontal fixedly connected with I shape UHPC precast frame roof beam (2) in the both sides of one relative of height, cast in situ concrete frame post (1) sets for equal horizontal fixedly connected with U type UHPC precast frame roof beam (3) in the both sides of another relative of height, its characterized in that: one end of the I-shaped UHPC prefabricated frame beam (2) connected with the cast-in-place concrete frame column (1) is a prefabricated frame beam connecting section (2-2), a beam end variable cross section post-cast connecting cavity (2-3) is arranged inside the prefabricated frame beam connecting section (2-2), and the end of the beam end variable cross section post-cast connecting cavity (2-3) and the core area of the cast-in-place concrete frame column (1) are fused after concrete is cast in place to form a one-time integral cast-in-place concrete connecting node (2-7).
2. The assembled UHPC precast beam column post-cast cavity integral connection structure of claim 1, which is characterized in that: the main body of the I-shaped UHPC prefabricated frame beam (2) is an I-shaped UHPC prefabricated beam (2-1), the cross section of one end, connected with the cast-in-place concrete frame column (1), of the I-shaped UHPC prefabricated beam (2-1) is of a rectangular structure and forms a prefabricated frame beam connecting section (2-2), a beam end variable cross section post-pouring connecting cavity (2-3) in the prefabricated frame beam connecting section (2-2) is a UHPC prefabricated beam end rectangular cavity, a rectangular reserved post-pouring gate (2-4) is arranged at the upper part of the PC prefabricated beam end rectangular cavity, the prefabricated frame beam connecting section (2-2) is in transitional connection with the I-shaped UHPC prefabricated frame beam through an I-shaped PC prefabricated frame beam variable cross section plate section (2-5), and a main beam V-shaped cavity (2-6) communicated with the beam end variable cross section post-pouring connecting cavity (2-3) is arranged in the I-shaped UHPC prefabricated frame beam variable cross section post-pouring connecting cavity (2-5); reinforcing steel bars are distributed in the cast-in-place concrete frame column (1), beam hogging moment reinforcing steel bars needed by structural calculation are arranged on the upper portion of the I-shaped UHPC prefabricated frame beam (2) before pouring and connecting, and the beam hogging moment reinforcing steel bars horizontally move to the hogging moment range of the connecting position of the beam hogging moment reinforcing steel bars and the cast-in-place concrete frame column (1).
3. The integral post-cast cavity connecting structure for the assembled UHPC precast beam column as recited in claim 2, wherein: the total length range of the beam end variable cross section post-cast connection cavity (2-3) is a shearing range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223181257.0U CN218643524U (en) | 2022-11-29 | 2022-11-29 | Assembled UHPC precast beam post-cast cavity integral connecting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223181257.0U CN218643524U (en) | 2022-11-29 | 2022-11-29 | Assembled UHPC precast beam post-cast cavity integral connecting structure |
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| CN218643524U true CN218643524U (en) | 2023-03-17 |
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| CN202223181257.0U Active CN218643524U (en) | 2022-11-29 | 2022-11-29 | Assembled UHPC precast beam post-cast cavity integral connecting structure |
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