Steel frame structure with adjustable floor height and design method thereof

Abstract

The application provides a steel frame structure with adjustable floor height and a design method thereof, the steel frame structure with adjustable floor height comprising a steel frame beam and a steel frame column; the steel frame column comprising a fixed length section and a replaceable length section detachably connected with the fixed length section, and the steel frame beam being connected with the fixed length section of the steel frame column; the steel frame structure with adjustable floor height and the design method thereof provided by the application can meet the requirement of adjusting the floor height due to the change of the building function without removing the whole structure, can meet the precision and quality requirements under the design standard, and can ensure the construction quality by setting the replaceable length section in the steel frame column of the steel frame structure and replacing the replaceable length section.

Description

Technical Field

[0001] This invention relates to the field of building structure engineering technology, and in particular to a steel frame structure with adjustable floor height and its design method. Background Technology

[0002] In recent years, steel frame structures have been increasingly widely used in modern architecture. For existing steel frame structures, urban renewal policies have led to numerous functional adjustments, such as converting office buildings to residential buildings or industrial buildings to medical buildings. These different functions may require different floor heights. For newly constructed steel frame structures, especially multi-story industrial buildings under the "industrial-on-a-floor" model, the industrial uses of different floors may vary, and even the industrial uses of the same floor may change. Different industrial uses result in different floor height requirements due to varying processes. If the building's floor height cannot be adjusted to adapt to changes in industrial use, it will negatively impact the building's utilization efficiency.

[0003] In existing steel frame structures, the steel frame columns are all single structural members. When adjusting the floor height, the common practice is to first cut and adjust the steel frame columns to the designated position on-site, and then connect them on-site. However, the precision and quality of on-site cutting and connection cannot meet design standards, leading to problems in ensuring construction quality during the floor height adjustment process. Furthermore, the existing steel frame structure design methods do not consider the impact of floor height adjustments on the structure. After adjusting the floor height, a large number of structural members will require reinforcement and strengthening. The cost of reinforcement may far exceed the cost of demolition and reconstruction, thus resulting in high reinforcement costs after floor height adjustments. Summary of the Invention

[0004] The purpose of this invention is to provide a steel frame structure with adjustable floor height and its design method, so as to solve the problems of difficulty in ensuring construction quality and excessive reinforcement cost after floor height adjustment in the existing technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a steel frame structure with adjustable floor height, the steel frame structure comprising steel frame beams and steel frame columns; the steel frame column comprising a fixed length section and a replaceable length section detachably connected to the fixed length section, the steel frame beam being connected to the fixed length section of the steel frame column.

[0006] Optionally, the steel frame columns of the adjustable height layer of the steel frame structure include a first fixed length section, the replaceable length section, and a second fixed length section connected in sequence.

[0007] Optionally, the adjustable height layer may have one or more layers.

[0008] Optionally, the replaceable length segment is connected to the fixed length segment via a high-strength bolt assembly.

[0009] Optionally, the high-strength bolt assembly includes a splicing steel plate and high-strength bolts; the splicing steel plate is configured to connect the steel frame columns of the steel frame structure, and the high-strength bolts are configured to fasten the splicing steel plate.

[0010] Optionally, the fixed-length segment has the same cross-sectional shape as the replaceable-length segment.

[0011] Optionally, the fixed length section and the replaceable length section are of the cross-sectional type of I-beams, and the splicing steel plates and the high-strength bolts are disposed on the web and / or flanges of the I-beams.

[0012] Optionally, the high-strength bolts used to fix the replaceable length section and the fixed length section are of the same type before and after the adjustable height layer of the steel frame structure is replaced.

[0013] Based on the same inventive concept, the present invention also provides a design method for a steel frame structure with adjustable floor height. The steel frame structure with adjustable floor height includes a steel frame structure with adjustable floor height as described in any of the preceding claims. The design method for the steel frame structure with adjustable floor height includes the following steps:

[0014] Based on the expected functions of the building floors, a first steel frame structure calculation model before the floor height adjustment and a second steel frame structure calculation model after the adjustment are established respectively.

[0015] For the first steel frame structure calculation model and the second steel frame structure calculation model, the same component cross-section is selected, and the structural component cross-section of the steel frame structure is designed with an envelope.

[0016] For the first steel frame structure calculation model and the second steel frame structure calculation model, the replacement length segment and the fixed length segment of the steel frame column of the steel frame structure are connected by the same high-strength bolts, and the connection nodes of the steel frame structure are designed with an envelope.

[0017] Optionally, the second steel frame structure calculation model can be one or more.

[0018] Compared with the prior art, the adjustable-height steel frame structure and its design method provided by the present invention have the following advantages:

[0019] The present invention provides a steel frame structure with adjustable floor height, comprising steel frame beams and steel frame columns. Each steel frame column includes a fixed length section and a replaceable length section detachably connected to the fixed length section. The steel frame beams are connected to the fixed length sections of the steel frame columns. Therefore, by incorporating replaceable length sections into the steel frame columns of the steel frame structure and replacing these replaceable length sections, the present invention achieves the requirement for adjusting floor height due to changes in building function without dismantling the entire structure, while meeting the accuracy and quality requirements of design standards and ensuring construction quality.

[0020] Furthermore, the adjustable-height steel frame structure provided by the present invention comprises a first fixed-length segment, a replaceable-length segment, and a second fixed-length segment connected sequentially, wherein the fixed-length segment and the replaceable-length segment are connected by a high-strength bolt assembly. Thus, by placing the replaceable-length segment between the first and second fixed-length segments, the present invention ensures that the bending moment at the connection point between the replaceable-length segment and the fixed-length segment is small, thereby effectively reducing the number of high-strength bolts and lowering the connection difficulty. The use of high-strength bolts facilitates the replacement of the replaceable-length segment, ensuring connection quality and shortening the construction period.

[0021] Furthermore, the adjustable-height steel frame structure design method provided by the present invention establishes a first steel frame structure calculation model before the floor height adjustment and a second steel frame structure calculation model after the adjustment, and performs an envelope design on the first steel frame structure calculation model and the second steel frame structure calculation model to achieve the goal of not needing to reinforce the steel frame structure when adjusting the floor height, thereby effectively reducing engineering costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a steel frame structure with adjustable floor height provided in one embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram showing the connection between the fixed length section and the replaceable length section of the steel frame column in an adjustable-height steel frame structure according to one embodiment of the present invention.

[0024] Figure 3 This is a schematic diagram of the connection between the fixed length section and the replaceable length section of the steel frame column in an adjustable-height steel frame structure provided in one embodiment of the present invention.

[0025] Figure 4 This is a schematic diagram of the design method for a steel frame structure with adjustable floor height according to one embodiment of the present invention.

[0026] 1-Steel frame structure, 10-Steel frame beam, 11, 12-Steel frame column, 110-First fixed length section, 111-Replaceable length section, 112-Second fixed length section, 1101, 1111-Web plate, 1102, 1112-Flange, 13-Spliced ​​steel plate, 14-High-strength bolt, 15-Adjustable height layer, 16-Non-adjustable height layer. Detailed Implementation

[0027] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the adjustable-height steel frame structure and its design method proposed in this invention. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this invention.

[0028] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0030] The core idea of ​​this invention is to provide a steel frame structure with adjustable floor height and its design method. By setting replaceable length sections in the steel frame columns of the steel frame structure and replacing the replaceable length sections, the need to adjust the floor height due to changes in building function can be met without dismantling the entire structure. This also meets the accuracy and quality requirements under the design standards and ensures the construction quality.

[0031] To achieve the above-mentioned goals, one embodiment of the present invention provides a steel frame structure with adjustable floor height. For example, please refer to [link to relevant documentation]. Figures 1-3 , Figure 1 This is a schematic diagram of a steel frame structure with adjustable floor height provided in one embodiment of the present invention; Figure 2 This is a schematic diagram showing the connection between the fixed length section and the replaceable length section of the steel frame column in an adjustable-height steel frame structure according to one embodiment of the present invention. Figure 3This is a schematic cross-sectional view of the connection between the fixed-length section and the replaceable-length section of the steel frame column in a steel frame structure with adjustable floor height provided in one embodiment of the present invention. Figure 1 As shown, the present invention provides a steel frame structure 1 with adjustable floor height, the steel frame structure 1 including steel frame beams 10 and steel frame columns 11; the steel frame columns 11 include fixed length sections (exemplarily, such as...). Figure 1 The steel frame beam 10 is connected to the fixed length section 110 and the second fixed length section 112 in the steel frame beam 10 and the fixed length section 111 which is detachably connected to the fixed length section.

[0032] The adjustable-height steel frame structure 1 provided by this invention, by setting replaceable length segments 111 in the steel frame columns 11 and detachably connecting the replaceable length segments 111 to the fixed length segments, allows for adjustment of the building's floor height by replacing the replaceable length segments 111. During floor height adjustment, different lengths of the replaceable length segments 111, meeting accuracy and quality requirements, can be selected according to different floor height needs and design standards, thus ensuring construction quality. Furthermore, by connecting the steel frame beams 10 to the fixed length segments of the steel frame columns, the stability of the building structure is further improved. Therefore, this invention, by setting replaceable length segments 111 in the steel frame columns 11 of the steel frame structure 1 and using the method of replacing these replaceable length segments 111, achieves the need for floor height adjustment due to changes in building function without dismantling the entire structure, while meeting the accuracy and quality requirements under design standards and ensuring construction quality.

[0033] Preferably, please continue to see Figure 1 ,like Figure 1 As shown, Figure 1 The thick black dashed line (below the direction shown in the image) indicates the adjustable height layer 15. Figure 1 The light black dashed line (above the direction shown in the illustration) indicates the non-adjustable height layer 16. In some exemplary embodiments, the steel frame columns 11 provided in the adjustable height layer 15 include replaceable length segments 111, meaning the height of the steel frame columns 11 can be adjusted by replacing the replaceable length segments 111 of different lengths. The length of the steel frame columns 12 provided in the non-adjustable height layer 16 is fixed, and the steel frame columns 12 are preferably integral members. Thus, by providing replaceable length segments only in the steel frame columns of the adjustable height layer 15, the steel frame structure 1 can combine stability with architectural design flexibility.

[0034] Exemplary examples, in some exemplary embodiments, the steel frame columns 11 of the adjustable height layer 15 of the steel frame structure 1 include a first fixed length segment 110, a replaceable length segment 111, and a second fixed length segment 112 connected in sequence. Thus, the adjustable height steel frame structure 1 provided by the present invention ensures that the replaceable length segment 111 is located in the middle of the steel frame column 11 by sequentially connecting the first fixed length segment 110, the replaceable length segment 111, and the second fixed length segment 112. This results in a smaller bending moment at the middle position of the steel frame column 11, thereby reducing the difficulty of connecting the replaceable length segment 111 to the fixed length segment.

[0035] Preferably, in some exemplary embodiments, the replaceable length segments 111 in the steel frame columns 11 of the same adjustable height layer 15 are of the same length, so as to facilitate the replacement of the replaceable length segments 111, reduce construction difficulty, and improve construction efficiency.

[0036] It should be noted that the present invention does not specifically limit the position of the replaceable length segment 111 in all the steel frame columns 11 within the same adjustable height layer 15. Preferably, as... Figure 1 As shown, in some embodiments, the replaceable length segments 111 of all the steel frame columns 11 in the adjustable height layer 15 are all set at the same height position, which makes it easier to replace the replaceable length segments 111 when adjusting the floor height and improves construction efficiency; in other embodiments, the replaceable length segments 111 of all the steel frame columns 11 in the same adjustable height layer 15 are set at different height positions to improve the stability of the building structure.

[0037] It should be noted that the present invention does not specifically limit the number of replaceable length segments 111 provided in the same steel frame column 11 of the adjustable height layer 15. Preferably, the number of replaceable length segments 111 is one, so as to reduce construction difficulty and improve construction efficiency.

[0038] Exemplary examples show that in some of the exemplary embodiments, the adjustable height layer 15 has one or more layers. The adjustable height steel frame structure 1 provided by the present invention, by setting the adjustable height layer 15 to have one or more layers, enables height adjustment of any floor within the same building. Thus, the adjustable height steel frame structure 1 provided by the present invention, through the flexible arrangement of the adjustable height layer 15, meets the height adjustment needs of different floors within the same building, improves the flexibility of the building structure, and further enhances the efficiency of the building structure.

[0039] Preferably, in some exemplary embodiments, the adjustable height layer 15 is one layer located at the bottom of the steel frame structure 1 to reduce the difficulty of adjusting the floor height, thereby speeding up the construction period.

[0040] Exemplary examples show that, in some exemplary embodiments, the replaceable length segment 111 is connected to the fixed length segment via a high-strength bolt assembly. Thus, the height-adjustable steel frame structure 1 provided by the present invention, by connecting the replaceable length segment 111 to the fixed length segment via the high-strength bolt assembly, facilitates the replacement of the replaceable length segment 111, shortens the construction period, and further ensures the fulfillment of the height adjustment requirements for the adjustable height layer 15.

[0041] For example, please continue to see Figure 2 and Figure 3 ,like Figure 2 and Figure 3 As shown, in some exemplary embodiments, the high-strength bolt assembly includes a splicing steel plate 13 and a high-strength bolt 14; the splicing steel plate 13 is configured to connect the steel frame column 11 of the steel frame structure 1, and the high-strength bolt 14 is configured to fasten the splicing steel plate 13. Thus, the adjustable-height steel frame structure 1 provided by the present invention utilizes the splicing steel plate 13 to connect the replaceable length segment 111 of the steel frame column 11 of the steel frame structure 1 with the fixed length segment (exemplarily, such as...). Figure 2 The first fixed length section is connected to the spliced ​​steel plate 13 by the high-strength bolts 14, which ensures the firm connection between the replaceable length section 111 and the fixed length section, guarantees the connection quality, and thus further improves the overall stability of the steel frame structure 1.

[0042] Exemplary examples show that, in some exemplary embodiments, the fixed length segment and the replaceable length segment 111 have the same cross-sectional shape. Thus, the adjustable-height steel frame structure 1 provided by the present invention, by employing the arrangement of having the fixed length segment and the replaceable length segment 111 having the same cross-sectional shape, achieves a seamless connection between the fixed length segment and the replaceable length segment 111, which not only significantly reduces the connection difficulty but also effectively improves the stability of the steel frame structure 1.

[0043] It should be noted that the present invention does not specifically limit the cross-sectional shape of the fixed length segment and the replaceable length segment 111.

[0044] For example, please continue to see Figure 2 and Figure 3 ,like Figure 2 and Figure 3As shown, in some exemplary embodiments, the fixed length segment and the replaceable length segment 111 have an I-beam cross-section, and the splicing steel plate 13 and the high-strength bolts 14 are disposed on the web of the I-beam (exemplarily, such as...). Figure 2 The web 1101 of the first fixed length segment 110 and the web 1111 of the replaceable length segment 111) and / or the flange (exemplarily, such as Figure 2 The fixed length segment 110 has flange 1102 and the replaceable length segment 111 has flange 1112. Thus, the adjustable-height steel frame structure 1 provided by the present invention, by setting the splicing steel plate 13 and the high-strength bolts 14 on the web and / or flanges of the I-beam, ensures a more reliable and secure connection between the fixed length segment and the replaceable length segment 111, further improving the overall stability of the steel frame structure 1.

[0045] Preferably, in some other exemplary embodiments, the fixed length segment and the replaceable length segment 111 have a box-shaped cross-section, and the splicing steel plate 13 and the high-strength bolts 14 are disposed on the web and / or flanges of the box-shaped cross-section steel structure.

[0046] It should be noted that the present invention does not specifically limit the specific parameters of the splicing steel plate 13 provided on the web and / or flange. For example, the specific parameters of the splicing steel plate 13 include, but are not limited to, thickness, size, stiffness, etc.; the present invention does not specifically limit the specific parameters of the high-strength bolts 14 provided on the splicing steel plate 13. For example, the specific parameters of the high-strength bolts 14 include, but are not limited to, diameter, strength, quantity, etc.

[0047] Exemplary examples, in some exemplary embodiments, the high-strength bolts 14 used to fix the replaceable length segment 111 and the fixed length segment are of the same type before and after replacing the replaceable length segment 111 in the adjustable height layer 15 of the steel frame structure. Thus, the adjustable height steel frame structure 1 provided by the present invention uses the same type of high-strength bolts 14 to fix the replaceable length segment 111 and the fixed length segment in the adjustable height layer 15 before and after replacing the replaceable length segment 111, which effectively reduces the construction difficulty during replacement and saves construction costs.

[0048] Based on the same inventive concept, this invention also provides a design method for a steel frame structure with adjustable floor height. Please continue to see... Figures 1-4 ,in, Figure 4 This is a schematic diagram illustrating the design method for an adjustable-height steel frame structure provided in this embodiment. Figures 1-4As shown, the adjustable-height steel frame structure 1 includes an adjustable-height steel frame structure 1 as described in any of the preceding claims. The design method for the adjustable-height steel frame structure includes the following steps:

[0049] S100: Based on the expected functions of the building floors, establish a first steel frame structure calculation model before the floor height adjustment and a second steel frame structure calculation model after the adjustment of the steel frame structure 1.

[0050] S200: For the first steel frame structure calculation model and the second steel frame structure calculation model, the same component cross-section is selected, and the structural component cross-section of the steel frame structure 1 is designed with an envelope.

[0051] S300: For the first steel frame structure calculation model and the second steel frame structure calculation model, the replaceable length segment 111 and the fixed length segment of the steel frame column 11 of the steel frame structure 1 are connected by the same high-strength bolt 14, and the connection node of the steel frame structure 1 is designed with an envelope.

[0052] Therefore, the adjustable-height steel frame structure design method provided by the present invention, by establishing a first steel frame structure calculation model before the adjustment of the floor height and a second steel frame structure calculation model after the adjustment of the floor height of the steel frame structure 1, performs modular analysis of the expected functions of the building floors, optimizes the building construction plan, and greatly improves the accuracy and overall efficiency of building construction; by selecting the same component cross-section for the first steel frame structure calculation model and the second steel frame structure calculation model and performing an envelope design on the component cross-section, and by using the same high-strength bolts 14 to connect the replaceable length segment 111 and the fixed length segment of the steel frame column 11 of the steel frame structure 1, and performing an envelope design on the connection node of the steel frame structure 1, the safety and reliability of the building structure are improved, the design and construction efficiency is increased, and the reinforcement cost after the floor height adjustment is reduced.

[0053] Therefore, the steel frame structure design method with adjustable floor height provided by the present invention establishes a first steel frame structure calculation model before floor height adjustment and a second steel frame structure calculation model after adjustment, and performs an envelope design on the first steel frame structure calculation model and the second steel frame structure calculation model, so that the steel frame structure 1 does not need to be reinforced when the floor height is adjusted, effectively reducing the engineering cost.

[0054] Exemplary examples show that in some of the exemplary embodiments, the second steel frame structure calculation model is one or more. Thus, the present invention provides a steel frame design method with adjustable floor height, which can establish different second steel frame structure calculation models according to different expected floor height adjustment requirements of the building, thereby realizing the envelope design of the steel frame structure 1 under different floor height adjustment requirements and satisfying the different expected floor height adjustment requirements of the building.

[0055] Compared with the prior art, the adjustable-height steel frame structure and its design method provided by the present invention also have the following beneficial effects:

[0056] The present invention provides a steel frame structure with adjustable floor height, comprising steel frame beams and steel frame columns. Each steel frame column includes a fixed length section and a replaceable length section detachably connected to the fixed length section. The steel frame beams are connected to the fixed length sections of the steel frame columns. Therefore, by incorporating replaceable length sections into the steel frame columns of the steel frame structure and replacing these replaceable length sections, the present invention achieves the requirement for adjusting floor height due to changes in building function without dismantling the entire structure, while meeting the accuracy and quality requirements of design standards and ensuring construction quality.

[0057] Furthermore, the adjustable-height steel frame structure provided by the present invention includes, for the steel frame columns of the adjustable-height layer of the steel frame structure, a first fixed-length segment, a replaceable-length segment, and a second fixed-length segment connected in sequence, and the fixed-length segment and the replaceable-length segment are connected by high-strength bolts. Thus, by employing a connection method where the replaceable-length segment is placed between the first and second fixed-length segments, the present invention ensures that the bending moment at the connection point between the replaceable-length segment and the fixed-length segment is small, thereby effectively reducing the number of high-strength bolts and lowering the connection difficulty; the use of high-strength bolts facilitates the replacement of the replaceable-length segment, ensuring connection quality and shortening the construction period.

[0058] Furthermore, the adjustable-height steel frame structure design method provided by the present invention establishes a first steel frame structure calculation model before the floor height adjustment and a second steel frame structure calculation model after the adjustment, and performs an envelope design on the first steel frame structure calculation model and the second steel frame structure calculation model to achieve the goal of not needing to reinforce the steel frame structure when adjusting the floor height, thereby effectively reducing engineering costs.

[0059] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0060] The above are merely preferred embodiments of the present invention and do not constitute any limitation on the present invention. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and content disclosed in the present invention without departing from the scope of the present invention shall be deemed to have remained within the protection scope of the present invention.

Claims

1. A steel frame structure with adjustable floor height, characterized in that, The height-adjustable steel frame structure includes steel frame beams and steel frame columns; each steel frame column includes a fixed length section and a replaceable length section detachably connected to the fixed length section, allowing adjustment of the building's floor height by replacing the replaceable length sections of different lengths; the steel frame beams are connected to the fixed length sections of the steel frame columns; the steel frame columns of the height-adjustable layer of the steel frame structure include a first fixed length section, the replaceable length section, and a second fixed length section connected in sequence; the cross-sections of the steel frame structure components meet the envelope design requirements before and after floor height adjustment, and the connectors between the replaceable length sections and the fixed length sections also meet the envelope design requirements before and after floor height adjustment.

2. The steel frame structure with adjustable floor height as described in claim 1, characterized in that, The adjustable height layer may have one or more layers.

3. The steel frame structure with adjustable floor height as described in claim 1, characterized in that, The replaceable length section is connected to the fixed length section by a high-strength bolt assembly.

4. A steel frame structure with adjustable floor height as described in claim 3, characterized in that, The high-strength bolt assembly includes splicing steel plates and high-strength bolts; the splicing steel plates are configured to connect the steel frame columns of the steel frame structure, and the high-strength bolts are configured to fasten the splicing steel plates.

5. The steel frame structure with adjustable floor height as described in claim 4, characterized in that, The fixed-length segment has the same cross-sectional shape as the replaceable-length segment.

6. A steel frame structure with adjustable floor height as described in claim 5, characterized in that, The fixed length section and the replaceable length section are of the cross-sectional type of I-beams, and the splicing steel plates and the high-strength bolts are set on the web and / or flanges of the I-beams.

7. A steel frame structure with adjustable floor height as described in claim 4, characterized in that, Before and after replacing the replaceable length section, the high-strength bolts used to fix the replaceable length section and the fixed length section of the adjustable height layer of the steel frame structure are of the same type.

8. A design method for a steel frame structure with adjustable floor height, characterized in that, The adjustable-height steel frame structure includes a steel frame structure with adjustable height as described in any one of claims 1-7, and the design method of the adjustable-height steel frame structure includes the following steps: Based on the expected functions of the building floors, a first steel frame structure calculation model before the floor height adjustment and a second steel frame structure calculation model after the adjustment are established respectively. For the first steel frame structure calculation model and the second steel frame structure calculation model, the same component cross-section is selected, and the structural component cross-section of the steel frame structure is designed with an envelope. For the first steel frame structure calculation model and the second steel frame structure calculation model, the replacement length segment and the fixed length segment of the steel frame column of the steel frame structure are connected by the same high-strength bolts, and the connection nodes of the steel frame structure are designed with an envelope.

9. The design method for a steel frame structure with adjustable floor height as described in claim 8, characterized in that, The second steel frame structure calculation model can be one or more.

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