Fabricated steel-concrete composite structure system

Abstract

The invention relates to a fabricated steel-concrete composite structure system which comprises an upper frame and a lower transfer layer located below the upper frame, the upper frame is formed by building a plurality of PEC beams and PEC columns, and the lower transfer layer is formed by building a plurality of steel-concrete composite transfer beams and steel-concrete composite transfer columns. The span between every two adjacent PEC columns is smaller than the span between every two adjacent steel-concrete combined transfer columns, the bottom ends of the steel-concrete combined transfer beams are located on the steel-concrete combined transfer beams, and the PEC columns and the PEC beams as well as the steel-concrete combined transfer beams are connected in a dry mode. For an intensive multifunctional building, due to the fact that the upper small bay and the lower public space need to be converted due to different column grid sizes, the upper small bay area adopts PEC components, the lower portion adopts steel-concrete components to build a conversion layer, force transmission is reasonable and reliable, the requirements for bearing capacity and rigidity can be met, the workload of on-site wet operation and post-pouring can be reduced, and the construction cost is reduced. And the construction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated buildings, and in particular to a prefabricated steel-concrete composite structure system. Background Art

[0002] With the continuous advancement of urban renewal, urbanization has gradually entered the stage of intensive development, and intensive multifunctional buildings have emerged, especially in the projects in the city center of medium and large cities. The upper part is mostly intensive apartments, which meet the number of units in a limited space. They often require small floor heights and compact room layouts, which require small-scale structural components and smaller column spans to achieve, while the lower part is mostly community service facilities, commerce, cultural centers, street elderly assistance facilities, medical emergency facilities and other functions, which require conventional column spans or even large column span structures to achieve. This type of intensive multifunctional building is conducive to the formation of a three-dimensional level from the ground to the air, providing people with a vibrant and healthy community, and interpenetrating with the urban space to form a fast community life circle.

[0003] At present, intensive multifunctional buildings generally adopt steel structures or prefabricated reinforced concrete structural systems. The comfort of steel structure frames is relatively low, and considering the fire and corrosion resistance requirements of steel structures, the cost of steel structures is high; while prefabricated reinforced concrete nodes require high connection accuracy, complex processes, high construction difficulty, and large wet work workload. Although the node volume is small, the formwork is complex. Therefore, a new structural system is urgently needed to meet the requirements of vertical multifunctional intensive buildings with small upper bays and large lower spaces. Summary of the invention

[0004] The object of the present invention is to provide an assembled steel-concrete composite structural system, which at least solves one of the technical problems existing in the existing intensive multifunctional building structural system using steel structure or prefabricated reinforced concrete.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an assembled steel-concrete composite structure system, comprising an upper frame and a lower transfer layer located below the upper frame, wherein the upper frame is constructed by a plurality of PEC beams and PEC columns, and the lower transfer layer is constructed by a plurality of steel-concrete composite transfer beams and steel-concrete composite transfer columns, the span between two adjacent PEC columns is smaller than the span between two adjacent steel-concrete composite transfer columns, and the bottom ends of the PEC columns are all located on the steel-concrete composite transfer beams, and the PEC columns are dry-connected to the PEC beams and the steel-concrete composite transfer beams.

[0006] Optionally, the PEC beam and the PEC column are connected by bolt welding.

[0007] Optionally, the PEC column and the steel-concrete composite conversion beam are connected by bolt welding.

[0008] Optionally, the PEC beams and the PEC columns are both prefabricated components.

[0009] Optionally, the steel-concrete composite conversion beam and the steel-concrete composite conversion column are both cast-in-place components.

[0010] Optionally, the steel-concrete composite conversion beam and the steel-concrete composite conversion column are both one of reinforced concrete components, steel-framed concrete components and steel tube concrete components.

[0011] Optionally, the prefabricated steel-concrete composite structure system also includes an upper wall, and the PEC beams and the PEC columns are both enclosed in the upper wall.

[0012] Optionally, the width of the PEC beam and the PEC column is no more than 180 mm.

[0013] Optionally, surfaces of the PEC beam and the PEC column are coated with fireproof material.

[0014] Optionally, the vertical projection of part of the PEC column is located within the vertical projection of the steel-concrete composite conversion column.

[0015] The assembled steel-concrete composite structure system provided by the present invention has at least one of the following beneficial effects:

[0016] 1) Compared with pure steel structure, it has greater rigidity, higher bearing capacity, safer structural system and higher comfort;

[0017] 2) Compared with PC components, the same bearing capacity can be achieved through a smaller cross-section, reducing the weight of the components, which not only improves the convenience of transportation and hoisting, but also reduces related costs;

[0018] 3) The components have excellent seismic performance, and the nodes are connected by bolt welding, which is not only safe and reliable, but also can reduce the workload of on-site wet work and post-casting, and improve construction efficiency;

[0019] 4) The beams and columns can be hidden in the partition wall without being exposed, reducing protruding beams and columns, which is convenient for later decoration inside and outside the building;

[0020] 5) PEC components can be standardized in the factory and assembled on site, with less wet work on site and fast construction speed. They also have good seismic and fire resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Those skilled in the art should understand that the drawings are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

[0022] Figure 1A schematic structural diagram of an assembled steel-concrete composite structural system provided by an embodiment of the present invention;

[0023] Figure 2 A partial schematic diagram of a prefabricated steel-concrete composite structure system provided in one embodiment of the present invention.

[0024] in:

[0025] 110-PEC beam; 120-PEC column; 210-steel-concrete composite transfer beam; 220-steel-concrete composite transfer column. DETAILED DESCRIPTION

[0026] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Any modification of the structure, change in the proportional relationship or adjustment of the size, under the same or similar conditions as the effects that can be produced by the present invention and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present invention.

[0027] As used in the present invention, the singular forms "one", "an", and "the" include plural objects, unless the content clearly indicates otherwise. As used in the present invention, the term "or" is generally used in a sense that includes "and / or", unless the content clearly indicates otherwise. As used in the present invention, the term "several" is generally used in a sense that includes "at least one", unless the content clearly indicates otherwise. As used in the present invention, the term "at least two" is generally used in a sense that includes "two or more", unless the content clearly indicates otherwise. In addition, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", and "third" may explicitly or implicitly include one or at least two of the features.

[0028] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Please refer to Figure 1-Figure 2 The present embodiment provides an assembled steel-concrete composite structure system, including an upper frame and a lower transfer layer located below the upper frame, wherein the upper frame is constructed by a plurality of PEC beams 110 and PEC columns 120, and the lower transfer layer is constructed by a plurality of steel-concrete composite transfer beams 210 and steel-concrete composite transfer columns 220, wherein the span between two adjacent PEC columns 120 is smaller than the span between two adjacent steel-concrete composite transfer columns 220, and the bottom ends of the PEC columns 120 are all located on the steel-concrete composite transfer beams 210, and the PEC columns 120 are all dry-connected to the PEC beams 110 and the steel-concrete composite transfer beams 210.

[0030] It should be noted that the PEC component is a partially covered steel-concrete composite structure, which is formed by welding steel bars or flat steel around the steel frame and pouring concrete, with the steel frames exposed outside the concrete at both ends. The bearing mechanism of the PEC component is similar to that of the steel concrete component, but its bearing capacity, stiffness and ductility are better than those of pure steel structure or reinforced concrete structure, and it also has good seismic resistance and fire resistance. In addition, the ends of the PEC component do not need to be poured, which can greatly reduce the workload of wet work and post-pouring on site.

[0031] The assembled steel-concrete composite structure system provided in this embodiment needs to be converted due to the different column grid sizes of the upper small bay and the lower public space. The PEC components are used in the upper small bay area with higher requirements for the building's indoor space, and the steel-concrete components are used to build the conversion layer in the lower part. The force transmission is reasonable and reliable, which can not only meet the bearing capacity and stiffness requirements, but also reduce the on-site wet work and post-casting workload, thereby improving the construction efficiency.

[0032] Preferably, the PEC beam 110 and the PEC column 120 are connected by bolt welding. The bolt welding connection not only ensures the stability of the structure, but also has a relatively high connection strength and can withstand a large load. At the same time, it simplifies the construction process and reduces the construction period, which is a better choice.

[0033] Preferably, the PEC column 120 is connected to the steel-concrete composite transfer beam 210 by bolt welding. In this embodiment, since the bottom ends of the PEC columns 120 are located on the steel-concrete composite transfer beam 210, the load of the upper frame can be transferred to the basement floor or ground foundation below the lower transfer layer through the lower transfer layer, resulting in a good construction effect and more reasonable and reliable force transmission.

[0034] In this embodiment, the PEC beam 110 and the PEC column 120 are both prefabricated components. Compared with PC (precast concrete) components, the PEC components can achieve the same bearing capacity level through a smaller cross-section, reduce the weight of the components, improve the convenience of transportation, hoisting, etc., and reduce related costs; compared with pure steel structures, the PEC components have greater rigidity, higher bearing capacity, and a safer structural system with higher comfort.

[0035] In this embodiment, the steel-concrete composite conversion beam 210 and the steel-concrete composite conversion column 220 are both cast-in-place components.

[0036] Optionally, the steel-concrete composite transfer beam 210 and the steel-concrete composite transfer column 220 are both one of reinforced concrete components, steel-framed concrete components (SRC) and steel tube concrete components. Preferably, the steel-concrete composite transfer beam 210 and the steel-concrete composite transfer column 220 are both SRC components, and the PEC and SRC components are both steel-concrete composite structures with similar mechanical properties. The PEC beam-column node and the PEC and SRC connection node can be in the form of bolt-welded connection nodes, with good seismic performance, high degree of building industrialization, convenient on-site operation, accurate processing accuracy, high installation efficiency, good building effect, and reasonable and reliable force transmission.

[0037] In this embodiment, the assembled steel-concrete composite structure system also includes an upper wall, and the PEC beam 110 and the PEC column 120 are both covered in the upper wall. In an intensive multifunctional building, the upper small bay functional area is compactly laid out, requiring the structural beam and column components to be hidden in the building partition wall (i.e., the upper wall) as much as possible without being exposed, and the cross-sectional width of the structural component is controlled not to exceed the thickness of the building partition wall. In this embodiment, the thickness of the building partition wall is usually 200 mm, and after deducting the thickness of the plaster surface layer, the width of the PEC beam 110 and the PEC column 120 is no more than 180 mm.

[0038] Preferably, the surfaces of the PEC beam 110 and the PEC column 120 are coated with fireproof materials to improve fireproof performance.

[0039] Preferably, the vertical projection of part of the PEC column 120 is located within the vertical projection of the steel-concrete combination conversion column 220. For intensive multifunctional buildings, the upper small bay functional area is compactly laid out with a small column span, while the lower part is mostly service supporting facilities, usually with a conventional column span or even a large column span structure. Therefore, the vertical projection of part of the PEC column 120 can be designed to be located within the vertical projection of the steel-concrete combination conversion column 220 to improve the reliability of force transmission.

[0040] In summary, the embodiment of the present invention provides an assembled steel-concrete composite structure system, which is suitable for intensive multifunctional buildings. Since the upper small bay and the lower public space need to be converted due to different column grid sizes, the upper small bay area with higher requirements for the building's indoor space adopts the PEC component, and the lower part adopts steel-concrete components to build a conversion layer. The force transmission is reasonable and reliable, which can not only meet the bearing capacity and stiffness requirements, but also reduce the on-site wet work and post-casting workload, thereby improving construction efficiency.

[0041] In addition, it should be recognized that although the present invention has been disclosed as a preferred embodiment, the above embodiment is not intended to limit the present invention. For any technician familiar with the art, without departing from the scope of the technical solution of the present invention, the technical content disclosed above can be used to make many possible changes and modifications to the technical solution of the present invention, or modified into equivalent embodiments of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still belongs to the scope of protection of the technical solution of the present invention.

Claims

1. An assembled steel-concrete composite structure system, characterized in that: It comprises an upper frame and a lower transfer layer located below the upper frame, wherein the upper frame is constructed of a plurality of PEC beams and PEC columns, and the lower transfer layer is constructed of a plurality of steel-concrete composite transfer beams and steel-concrete composite transfer columns, the span between two adjacent PEC columns is smaller than the span between two adjacent steel-concrete composite transfer columns, and the bottom ends of the PEC columns are all located on the steel-concrete composite transfer beams, and the PEC columns are dry-connected to the PEC beams and the steel-concrete composite transfer beams.

2. The assembled steel-concrete composite structure system according to claim 1 is characterized in that: The PEC beam and the PEC column are connected by bolt welding.

3. The assembled steel-concrete composite structure system according to claim 1 is characterized in that: The PEC column and the steel-concrete composite transfer beam are connected by bolt welding.

4. The assembled steel-concrete composite structure system according to claim 1 is characterized in that: The PEC beams and the PEC columns are both prefabricated components.

5. The assembled steel-concrete composite structure system according to claim 1 is characterized in that: The steel-concrete composite conversion beam and the steel-concrete composite conversion column are both cast-in-place components.

6. The assembled steel-concrete composite structure system according to claim 5 is characterized in that: The steel-concrete composite conversion beam and the steel-concrete composite conversion column are both one of reinforced concrete components, steel-framed concrete components and steel tube concrete components.

7. The assembled steel-concrete composite structure system according to claim 1 is characterized in that: The assembled steel-concrete composite structure system also includes an upper wall, and the PEC beams and the PEC columns are both enclosed in the upper wall.

8. The assembled steel-concrete composite structure system according to claim 7, characterized in that: The width of the PEC beam and the PEC column is no more than 180 mm.

9. The assembled steel-concrete composite structure system according to claim 7, characterized in that: The surfaces of the PEC beams and the PEC columns are coated with fireproof materials.

10. The assembled steel-concrete composite structure system according to claim 1, characterized in that: The vertical projection of part of the PEC column is located within the vertical projection of the steel-concrete composite conversion column.

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