Steel-concrete composite structure system transfer node

Abstract

The present invention relates to a steel-concrete composite structure system conversion node, including an upper frame and a lower conversion layer located below the upper frame, the upper frame is built by a plurality of PEC beams and PEC columns, the lower conversion layer is built by a plurality of SRC conversion beams and SRC conversion columns, the span between two adjacent PEC columns is smaller than the span between two adjacent SRC conversion columns, the bottom ends of the PEC columns are all located on the SRC conversion beams, and the end steel frames of the PEC columns completely fall on the steel frames of the SRC conversion beams. For intensive multifunctional buildings, since the upper small bays and the lower public spaces need to be converted due to different column grid sizes, the upper small bay areas with higher requirements for the indoor space of the building adopt PEC components, and the lower SRC components are used to build the conversion layer, the force transmission is reasonable and reliable, which can meet the bearing capacity and stiffness requirements, and can reduce the on-site wet operation and post-casting workload, thereby improving the construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated buildings, and in particular to a steel-concrete composite structural system conversion node. 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 type of structural system conversion node 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 purpose of the present invention is to provide a steel-concrete composite structural system conversion node, which has reasonable and reliable force transmission, can meet the bearing capacity and stiffness requirements, reduce the workload of on-site wet operations and post-casting, and improve construction efficiency.

[0005] In order to achieve the above-mentioned object, the present invention provides a steel-concrete composite structure system conversion node, comprising an upper frame and a lower conversion layer located below the upper frame, wherein the upper frame is constructed by a plurality of PEC beams and PEC columns, and the lower conversion layer is constructed by a plurality of SRC conversion beams and SRC conversion columns, the span between two adjacent PEC columns is smaller than the span between two adjacent SRC conversion columns, the bottom ends of the PEC columns are all located on the SRC conversion beams, and the end steel frames of the PEC columns completely fall on the steel frames of the SRC conversion beams.

[0006] Optionally, when the SRC transfer beam is located in the middle span of the lower transfer layer, the PEC column and the SRC transfer beam are centrally transferred, and the edge of the end steel frame of the PEC column is flush with the edge of the steel frame of the SRC transfer beam.

[0007] Optionally, when the SRC conversion beam is located at the side span of the lower conversion layer, the PEC column and the SRC conversion beam are non-centering conversions, the steel frame of the SRC conversion beam is cantilevered outward to form a cantilevered section, and the edge of the end steel frame of the PEC column is flush with the edge of the cantilevered section.

[0008] Optionally, a plurality of stiffening ribs are provided on the SRC conversion beam, and the stiffening ribs are provided adjacent to a connection node between the SRC conversion beam and the PEC column.

[0009] Optionally, the stiffening rib is arranged directly below the flange plate of the PEC column in a direction parallel to the web of the SRC conversion beam.

[0010] Optionally, the width of the stiffening rib is equal to the width of the flange plate of the PEC column.

[0011] Optionally, the end steel frame of the PEC beam and the end steel frame of the PEC column are connected by bolt welding.

[0012] Optionally, the end steel frame of the PEC column and the steel frame of the SRC conversion beam are connected by bolt welding.

[0013] Optionally, a portion of the vertical projection of the PEC column is located within the vertical projection of the SRC conversion column.

[0014] Optionally, the steel frames in the PEC beam, the PEC column, the SRC conversion beam and the SRC conversion column are all I-beams.

[0015] In the steel-concrete composite structure system conversion node provided by the present invention, at least one of the following beneficial effects is achieved:

[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) It can make the cross-section of beams and columns neat, reduce protruding beams and columns, and facilitate the later decoration of the interior and exterior of 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.

[0021] 6) It can solve the problem of PEC column centering and misalignment conversion in SRC conversion beam, ensuring more reasonable and reliable force transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 A schematic diagram of a structural conversion node of a steel-concrete composite structural system provided by an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the distribution of PEC columns on the lower conversion layer provided by one embodiment of the present invention;

[0025] Figure 3 A schematic diagram of the structure of the centering conversion between the PEC column and the SRC conversion beam provided by one embodiment of the present invention;

[0026] Figure 4 A schematic diagram of the structure of the non-centering conversion of the PEC column and the SRC conversion beam provided in one embodiment of the present invention.

[0027] in:

[0028] 110-PEC beam; 120-PEC column; 121-end steel frame of PEC column; 210-SRC transfer beam; 211-steel frame of SRC transfer beam; 212-cantilever section; 220-SRC transfer column; 221-steel frame of SRC transfer column; 310-stiffening rib. DETAILED DESCRIPTION

[0029] 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.

[0030] 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.

[0031] 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.

[0032] Please refer to Figure 1-Figure 2 The present embodiment provides a steel-concrete composite structure system conversion node, including an upper frame and a lower conversion 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 conversion layer is constructed by a plurality of SRC conversion beams 210 and SRC conversion columns 220, wherein the span between two adjacent PEC columns 120 is smaller than the span between two adjacent SRC conversion columns 220, and the bottom ends of the PEC columns 120 are all located on the SRC conversion beams 210, and the end steel frames 121 of the PEC columns 120 completely fall on the steel frames 211 of the SRC conversion beams 210.

[0033] 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, and its two ends are end steel frames 121 exposed outside the concrete. The bearing mechanism of the PEC component is similar to that of the steel-framed concrete component, but its bearing capacity, rigidity and ductility are better than those of pure steel structures or reinforced concrete structures, and it also has good seismic resistance and fire resistance. The SRC component is an embedded composite structural system with steel sections as the skeleton and steel bars and concrete poured around the steel sections. This structure is widely used in the construction field because the internal steel sections and the outer concrete form a whole and bear force together, and its force bearing performance is better than the simple superposition of the two structures.

[0034] The steel-concrete composite structure system conversion node provided in this embodiment requires conversion of the upper small bay and the lower public space 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 SRC component is used to build the conversion layer. The force transmission is reasonable and reliable, and the bearing capacity and stiffness requirements can be met. In addition, since the ends of the PEC components do not need to be cast, the workload of on-site wet operations and post-casting can be greatly reduced.

[0035] In this embodiment, the steel frames in the PEC beam 110 , the PEC column 120 , the SRC conversion beam 210 , and the SRC conversion column 220 include but are not limited to I-beams.

[0036] Preferably, the end steel frame of the PEC beam 110 is connected to the end steel frame 121 of the PEC column 120 by bolt welding. Bolt welding connection not only ensures the stability of the structure, but also has relatively high connection strength and can withstand large loads. It also simplifies the construction process and reduces the construction period, and is a better choice.

[0037] Preferably, the end steel frame 121 of the PEC column 120 is connected to the steel frame 211 of the SRC conversion beam 210 by bolt welding. In this embodiment, since the bottom ends of the PEC columns 120 are located on the SRC conversion beam 210, the load of the upper frame can be transferred to the basement floor or ground foundation below the lower conversion layer through the lower conversion layer, resulting in a good construction effect and more reasonable and reliable force transmission.

[0038] In this embodiment, when an SRC conversion column 220 is disposed below the SRC conversion beam 210 , the steel frame 211 of the SRC conversion beam 210 and the steel frame 221 of the SRC conversion column 220 are also connected by bolt welding.

[0039] 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.

[0040] In this embodiment, the SRC conversion beam 210 and the SRC conversion column 220 are both cast-in-place components. In addition to the corresponding bolt welding of steel frames, concrete is also cast-in-place at the connection nodes between the SRC conversion beam 210 and the SRC conversion column 220, the connection nodes between the SRC conversion beam 210 and the PEC column 120, and the connection nodes between the SRC conversion beam 210, the SRC conversion column 220 and the PEC column 120.

[0041] like Figure 2 and Figure 3 As shown, when the SRC conversion beam 210 is located in the middle span of the lower conversion layer, the PEC column 120 and the SRC conversion beam 210 are centrally converted, and the edge of the end steel frame 121 of the PEC column 120 is flush with the edge of the steel frame 211 of the SRC conversion beam 210.

[0042] like Figure 2 and Figure 4 As shown, when the SRC conversion beam 210 is located at the side span of the lower conversion layer, the PEC column 120 and the SRC conversion beam 210 are non-centering conversions, the steel frame 211 of the SRC conversion beam 210 cantilevers outward to form a cantilevered section 212, and the edge of the end steel frame 121 of the PEC column 120 is flush with the edge of the cantilevered section 212. It should be noted that the upper PEC column 120 and the lower SRC conversion beam 210 or column are often unable to be converted up and down in a centered manner due to the needs of the building function, so that part of the steel frame of the PEC column 120 may fall on the outside of the lower SRC conversion beam 210, resulting in the PEC column 120 being unable to be converted by traditional steel frame bolt welding or full welding. Therefore, the present application adds a cantilever section 212 at the end of the steel frame 211 of the SRC conversion beam 210, so that the end steel frame 121 of the PEC column 120 can completely fall on the SRC conversion beam 210 and its cantilever section 212, thereby ensuring that the force transmission is more reasonable and reliable. In this embodiment, the cantilever section 212 can be integrally formed with the steel frame 211 of the SRC conversion beam 210, or it can be separately processed and welded to the steel frame 211 of the SRC conversion beam 210, and the present invention does not limit this.

[0043] Preferably, a plurality of stiffening ribs 310 are provided on the SRC conversion beam 210, and the stiffening ribs 310 are provided near the connection nodes between the SRC conversion beam 210 and the PEC column 120. By providing the stiffening ribs 310 near the connection nodes between the SRC conversion beam 210 and the PEC column 120, the stiffness and strength of the SRC conversion beam 210 are improved, thereby improving the force-bearing performance of the SRC conversion beam 210.

[0044] Furthermore, the stiffening rib 310 is arranged directly below the flange plate of the PEC column 120 in a direction parallel to the web of the SRC conversion beam 210 to better transfer the load of the PEC column 120 .

[0045] Furthermore, the width of the stiffening rib 310 is equal to the width of the flange plate of the PEC column 120 .

[0046] Preferably, the vertical projection of part of the PEC column 120 is located within the vertical projection of the SRC 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 SRC conversion column 220 to improve the reliability of force transmission, so that the load of the upper small bay can be better transmitted to the ground foundation through the conversion layer below.

[0047] In summary, the embodiment of the present invention provides a steel-concrete composite structure system conversion node, 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 SRC component is used to build the 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 the construction efficiency.

[0048] 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. A steel-concrete composite structural system conversion node, characterized in that: It includes an upper frame and a lower conversion layer located below the upper frame, the upper frame is constructed by a plurality of PEC beams and PEC columns, the lower conversion layer is constructed by a plurality of SRC conversion beams and SRC conversion columns, the span between two adjacent PEC columns is smaller than the span between two adjacent SRC conversion columns, the bottom ends of the PEC columns are all located on the SRC conversion beams, and the end steel frames of the PEC columns completely fall on the steel frames of the SRC conversion beams.

2. The steel-concrete composite structure system conversion node according to claim 1, characterized in that: When the SRC transfer beam is located in the middle span of the lower transfer layer, the PEC column and the SRC transfer beam are centrally transferred, and the edge of the end steel frame of the PEC column is flush with the edge of the steel frame of the SRC transfer beam.

3. The steel-concrete composite structural system transfer node according to claim 1, characterized in that: When the SRC conversion beam is located at the side span of the lower conversion layer, the PEC column and the SRC conversion beam are non-centering conversions, the steel frame of the SRC conversion beam is cantilevered outward to form a cantilevered section, and the edge of the end steel frame of the PEC column is flush with the edge of the cantilevered section.

4. The steel-concrete composite structural system transfer node according to claim 1, characterized in that: The SRC conversion beam is provided with a plurality of stiffening ribs, and the stiffening ribs are arranged adjacent to the connection nodes between the SRC conversion beam and the PEC column.

5. The steel-concrete composite structure system transfer node according to claim 4, characterized in that: The stiffening rib is arranged just below the flange plate of the PEC column in a direction parallel to the web plate of the SRC conversion beam.

6. The steel-concrete composite structure system transfer node according to claim 5, characterized in that: The width of the stiffening rib is equal to the width of the flange plate of the PEC column.

7. The steel-concrete composite structural system transfer node according to claim 1, characterized in that: The end steel frame of the PEC beam and the end steel frame of the PEC column are connected by bolt welding.

8. The steel-concrete composite structural system transfer node according to claim 1, characterized in that: The end steel frame of the PEC column and the steel frame of the SRC conversion beam are connected by bolt welding.

9. The steel-concrete composite structural system transfer node according to claim 1, characterized in that: The vertical projection of part of the PEC column is located within the vertical projection of the SRC conversion column.

10. The steel-concrete composite structural system transfer node according to claim 1, characterized in that: The steel frames in the PEC beams, the PEC columns, the SRC conversion beams and the SRC conversion columns are all I-beams.

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