A prestressed composite building component for terminal building and stress monitoring device thereof

Abstract

The present invention relates to the technical field of building steel structure, specifically to a prestressed composite building component for a terminal building and a stress monitoring device thereof, comprising a cold-bent steel beam and an I-shaped support steel member supported at both ends of the cold-bent steel beam, wherein end face steel plate frames are locked and arranged on the upper sides of the two I-shaped support steel members, and the two end face steel plate frames are respectively sleeved and locked with the two ends of the cold-bent steel beam, and a plurality of prestressed steel wires are respectively longitudinally penetrated through the middle of the inner sides of the two casting cavities, and the two ends of the prestressed steel wires respectively penetrate through the outer sides of the two end face steel plate frames and are fixed with anchors, and by optimizing the component design, improving the connection technology and adopting excellent materials, a better combined support effect can be achieved, the structural stability can be improved, and the installation process can be simplified, so as to meet the higher requirements of modern large-scale buildings for structural performance and construction efficiency, and by innovatively combining the I-shaped support steel member with the cold-bent steel beam and the auxiliary support steel pipe, the structural performance and construction efficiency can be significantly improved.

Description

Technical Field

[0001] The invention relates to the technical field of building steel structures, in particular to a prestressed composite building component for a terminal building and a stress monitoring device thereof. Background Art

[0002] In modern building structures such as large terminal buildings, the use of prestressed composite building components is one of the key technologies to improve structural stability and service life. Prestressed technology effectively offsets or reduces stress concentration during use by pre-stressing components, thereby enhancing the structure's bearing capacity and anti-deformation ability. However, there are still some technical bottlenecks and challenges in the practical application of existing composite building components, especially in terms of composite support effect, structural stability and installation convenience; when designing traditional pre-assembled building components, they often rely too much on the performance of a single component and ignore the synergistic effect between components, resulting in poor support effect of the overall structure, especially in large-span, high-load buildings such as terminal buildings. The force effect of a single component is difficult to distribute evenly, and it is easy to form stress concentration at the connection part, reducing the overall stability and safety of the structure; during the long-term use of its components, due to the influence of environmental factors (such as temperature changes, humidity, corrosion, etc.) and the stress relaxation effect of the structure itself, the connection between the components is prone to loosening, which will not only weaken the support effect, but also may cause minor deformation and cracks in the structure, posing a potential threat to the long-term stability and safety of the building. In addition, the existing building components are relatively complex in structure and cannot be assembled flexibly, which leads to inconvenience during the installation process and increases the difficulty of on-site construction.

[0003] In addition, in the engineering field, stress detection of terminal building components usually adopts non-destructive testing technology. These technologies allow the evaluation of the internal stress state without destroying the structure, and use physical or mechanical principles to obtain stress-related parameters, thereby realizing the detection of component stress. Most of this detection is a stress health test of the component during or after the construction process. After the detection is qualified, the detection equipment is put away, and it is impossible to monitor the stress and usage status of the component in real time and effectively, and it is impossible to discover potential problems of the structure in time. Therefore, it is urgent to propose a prestressed composite building component and a stress monitoring device for a terminal. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a prestressed composite building component for a terminal building to solve the problems mentioned in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical solutions: a prestressed composite building component for a terminal building, comprising a cold-bent steel beam and an I-shaped support steel member supported at both ends of the cold-bent steel beam, the upper sides of the two I-shaped support steel members are locked with end face steel plate frames, and the two end face steel plate frames are respectively sleeved and locked with the two ends of the cold-bent steel beam; two separate casting cavities are provided on the inner side of the cold-bent steel beam, and a plurality of prestressed steel wires are respectively longitudinally penetrated in the middle of the inner sides of the two casting cavities, and the two ends of the prestressed steel wires respectively penetrate the outer sides of the two end face steel plate frames and are fixed with anchors;

[0006] The two end steel plate frames and the upper edges of the two ends of the cold-bent steel beam are spaced apart with casting openings, and the casting openings are connected with the two casting cavities. Auxiliary supporting steel pipes are vertically locked on both sides of the I-shaped supporting steel parts. The inner cavity of the auxiliary supporting steel pipe is connected with the casting cavity and is paved with steel bars. The inner cavity of the auxiliary supporting steel pipe and the two casting cavities can be poured with concrete through the casting openings and solidified into a whole, and the solidified concrete can bond with the steel bars and prestressed steel wires.

[0007] Based on the above technical solution, the cold-bent steel beam includes an S-shaped steel plate frame and a lower C-shaped frame plate and an upper C-shaped frame plate relatively embedded on both sides of the S-shaped steel plate frame. Two inner frame cavities are distributed on both sides of the S-shaped steel plate frame. The lower C-shaped frame plate is embedded in the inner frame cavity on the lower side of the S-shaped steel plate frame to form a lower casting cavity. The upper C-shaped frame plate is embedded in the inner frame cavity on the upper side of the S-shaped steel plate frame to form an upper casting cavity. Both ends of the lower casting cavity and the upper casting cavity are connected to the casting opening.

[0008] A layer of steel mesh is laid on the inner bottom of the lower C-shaped frame plate and the upper C-shaped frame plate. Two connecting openings corresponding to the auxiliary supporting steel pipe cavity are respectively opened on both sides of the bottom of the lower C-shaped frame plate and the S-shaped steel plate frame, and L-shaped steel bars are arranged on the inner side of the auxiliary supporting steel pipe cavity and the lower casting cavity, and the upper side of the L-shaped steel bar rests on the steel mesh of the lower C-shaped frame plate.

[0009] Based on the above technical solution, after the lower C-shaped frame plate and the upper C-shaped frame plate are embedded in the S-shaped steel plate frame and assembled, multiple groups of transverse connecting rods are horizontally penetrated in the middle of the lower casting cavity and the upper casting cavity;

[0010] Based on the above technical solution, each group of transverse connecting rods consists of two transverse connecting rods arranged parallel to each other, and both ends of each transverse connecting rod are locked and connected by nuts. After the end steel plate frame is sleeved on the assembled cold-bent steel beam, it is laterally penetrated and locked by multiple groups of transverse connecting rods, and each transverse connecting rod penetrates the inner side of the lower casting cavity and the upper casting cavity and bonds to the concrete.

[0011] Side steel plates are attached to both sides of the cold-bent steel beam, and the two side steel plates are respectively tightly attached to both sides of the S-shaped steel plate frame and the outer sides of the lower C-shaped frame plate and the upper C-shaped frame plate, and are penetrated by transverse connecting rods and locked with nuts.

[0012] Based on the above technical solution, each of the prestressed steel wires passes through each group of two parallel transverse connecting rods, wherein a plurality of shuttle-shaped steel parts are arranged in the middle of the prestressed steel wire, and the diameter of the shuttle-shaped steel parts gradually decreases from the middle to the two ends. Each of the shuttle-shaped steel parts is arranged between the two groups of transverse connecting rods, and the diameters at both ends of the shuttle-shaped steel parts are smaller than the spacing between each group of two parallel transverse connecting rods, while the diameter in the middle of the shuttle-shaped steel parts is larger than the spacing between the two parallel transverse connecting rods.

[0013] Based on the above technical solution, a lower bottom plate is provided on the lower side of the end face steel plate frame, which corresponds to the bottom of the casting opening, and the lower bottom plate can be tightly inserted into the lower side of the lower casting cavity for sealing.

[0014] The present invention also includes a stress monitoring device for a steel structure support used in the construction of a large venue. The stress monitoring device includes a stress sensor, an elastic mounting rod, and a plurality of infrared sensors installed on both sides of the elastic mounting rod. The stress sensor is staggered with the elastic mounting rod and the infrared sensor. The stress sensor is installed in the middle of the lower side of the cold-bent steel beam for direct detection. The elastic mounting rod and the infrared sensor are both spaced below the cold-bent steel beam, and the infrared sensor is arranged toward the bottom surface of the cold-bent steel beam. Both ends of the elastic mounting rod are installed on opposite sides of the I-shaped supporting steel member.

[0015] Furthermore, a slide groove is vertically provided on one side opposite to the two I-shaped supporting steel members, a supporting spring is installed at the bottom of the slide groove, and both ends of the elastic mounting rod are slidably installed in the slide groove and connected to the supporting spring.

[0016] By adopting the above technical solution, the present invention has the following advantages compared with the existing technology:

[0017] The present invention achieves better combined support effect, improves structural stability, and simplifies the installation process by optimizing component design, improving connection technology, and using excellent materials, thereby meeting the higher requirements of modern large-scale buildings on structural performance and construction efficiency. By innovatively combining I-shaped support steel parts with cold-bent steel beams and auxiliary support steel pipes, the structural performance and construction efficiency can be significantly improved:

[0018] The present invention provides two detachable auxiliary support steel pipes on both sides of the I-shaped support steel member to assist in the balanced support, thereby improving the structural strength of the I-shaped support steel member and further supporting the cold-bent steel beam and the entire component. The upper and lower independent casting cavities are arranged on the inner side of the cold-bent steel beam. Since the two casting cavities are both composed of steel structures, two rectangular support structures with high support strength are formed. The casting cavities are connected with the tube cavities of the auxiliary support steel pipes and poured with concrete to form a solid concrete whole. The concrete whole is tightly bonded with the internal steel bars and prestressed steel wires. The prestressed steel wire enhances the tensile strength of the structure, while the combination of steel bars and concrete improves the compressive strength, making the entire structure more balanced and stable when bearing loads. In particular, the close combination of concrete, cold-bent steel beams, and auxiliary support steel pipes improves the overall structural strength while effectively preventing the loosening, falling off, or damage of I-shaped support steel parts, cold-bent steel beams, and auxiliary support steel pipes, reducing maintenance costs and potential dangers. This integrated composite structure greatly enhances the rigidity and stability of structural components and improves the terminal's ability to resist natural disasters such as wind loads and earthquakes.

[0019] The cold-bent steel beam of the present invention is composed of a lower C-shaped frame plate and an upper C-shaped frame plate which are slidably embedded in the inner frame cavity on the left and right sides of the S-shaped steel plate frame, and is fixed to each other with the end steel plate frames of the two I-shaped supporting steel parts through multiple groups of transverse connecting rods, thereby forming an overall stable and high-strength frame structure, and forming a lower pouring cavity and an upper pouring cavity inside to communicate with the auxiliary supporting steel pipe cavity. After the concrete is filled, it is tightly combined with each component, further improving the overall rigidity and stability of the structure, and improving the construction efficiency. The structure is not only simple and ingenious, but also easy to assemble and use, without the need for on-site welding, and can be quickly assembled and fixed only by bolts and nuts. The concrete poured in the later stage can also be tightly combined with the transverse connecting rods when solidified, effectively preventing the transverse connecting rods from loosening or detaching under the action of external forces, thereby ensuring the long-term stability and safety of the structure.

[0020] The present invention provides a plurality of shuttle-shaped steel pieces with a larger diameter in the middle and smaller diameters at both ends at the middle of the prestressed steel wire. The shuttle-shaped steel pieces can be wrapped by the solidified concrete to form a mechanical bite, which significantly enhances the bonding force between the prestressed steel wire and the concrete. The combined use of the shuttle-shaped steel pieces and the prestressed steel wire and the tight bonding with the concrete enhance the ductility and toughness of the structure.

[0021] At the same time, the shuttle-shaped steel pieces are respectively arranged between the two groups of transverse connecting rods, and the diameters of the two ends of the shuttle-shaped steel piece are smaller than the spacing between the two parallel transverse connecting rods of each group, and can be inserted into the spacing, while the diameter of the middle part of the shuttle-shaped steel piece is larger than the spacing between the two parallel transverse connecting rods. When the prestressed steel wire is bent and deformed, the shuttle-shaped steel piece can effectively convert the deformation force into an oblique force, and then transmit it to each group of upper and lower transverse connecting rods. The transverse connecting rod force can act on the concrete, avoiding local stress concentration and improving the overall stability and bearing capacity of the structure.

[0022] The present invention is also provided with a stress monitoring device for real-time monitoring of component stress changes and usage status, which is used to prevent the occurrence of safety accidents and monitor key parts of the structure in real time so as to timely discover potential problems of the structure and improve the use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0024] Figure 1 It is a structural schematic diagram of the combined building component of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the end face steel plate frame of the present invention;

[0026] Figure 3 It is a schematic diagram of the exploded structure of the outer frame of the cold-bent steel beam of the present invention;

[0027] Figure 4 It is a schematic diagram of the connection structure between the cold-bent steel beam and the I-shaped supporting steel member of the present invention;

[0028] Figure 5 It is a schematic diagram of the structure inside the cold-bent steel beam of the present invention;

[0029] Figure 6 This is a schematic diagram of the connection structure between the prestressed steel wire and the end steel plate frame of the present invention;

[0030] Figure 7 It is a schematic diagram of the connection structure between the shuttle-shaped steel member and the transverse connecting rod of the present invention;

[0031] Figure 8 This is a schematic diagram of the structure of the L-shaped steel bar and the auxiliary supporting steel pipe of the present invention;

[0032] Fig. 9 It is a schematic diagram of the exploded structure of the combined building component of the present invention;

[0033] Fig.10 It is a schematic diagram of the position structure of the stress monitoring device of the present invention;

[0034] Fig.11It is a schematic diagram of the connection structure between the elastic mounting rod and the I-shaped supporting steel member of the present invention;

[0035] In the figure: I-shaped supporting steel member 1, cold-bent steel beam 2, S-shaped steel plate frame 21, inner frame cavity 210, lower C-shaped frame plate 22, lower casting cavity 220, upper C-shaped frame plate 23, upper casting cavity 230, steel mesh 24, connecting port 25, end steel plate frame 3, lower bottom plate 31, casting opening 4, stress monitoring device 5, stress sensor 51, elastic mounting rod 52, infrared sensor 53, slide 54, support spring 55, prestressed steel wire 6, anchor 61, shuttle steel member 62, transverse connecting rod 7, auxiliary supporting steel pipe 8, L-shaped steel bar 9, side steel plate 10. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0037] like Figure 1-11 As shown, the present invention provides a technical solution for a prestressed composite building component for a terminal building: comprising a cold-bent steel beam 2 and an I-shaped support steel member 1 supported at both ends of the cold-bent steel beam 2, wherein the upper sides of the two I-shaped support steel members 1 are locked with end face steel plate frames 3, the two end face steel plate frames 3 are respectively sleeved and locked with the two ends of the cold-bent steel beam 2, and the cold-bent steel beam 2 is fixed and limited by the two end face steel plate frames 3 locked on the I-shaped support steel member 1, wherein the length of the cold-bent steel beam 2 is produced and assembled according to the actual required length, and the I-shaped support steel member 1 can also be stacked and bolted as required;

[0038] Among them, two casting cavities distributed up and down are provided inside the cold-formed steel beam 2. Different from the prior art, the two casting cavities are both composed of steel structures, so that two rectangular support structures with high support strength can be formed. Moreover, the two casting cavities distributed up and down can make the concrete more evenly distributed inside the cold-formed steel beam 2 and solidify into a whole, thereby increasing the cross-sectional inertia moment of the beam and thus improving the bearing capacity of the beam.

[0039] At the same time, a plurality of prestressed steel wires 6 are longitudinally penetrated through the middle of the inner sides of the two casting cavities respectively. The combination of the prestressed steel wires 6 and the concrete enhances the bearing capacity of the structure and improves the bending and shearing resistance of the structure. The two ends of the prestressed steel wires 6 respectively penetrate the outer sides of the two end steel plate frames 3 and are fixed with anchors 61, thereby ensuring the effective transmission and fixation of the prestress.

[0040] The two end steel plate frames 3 and the upper edges of the two ends of the cold-bent steel beam 2 are spaced apart with casting openings 4, and the casting openings 4 are connected with the two casting cavities, so that concrete can be filled after the later assembly. Auxiliary support steel pipes 8 are vertically locked on both sides of the I-shaped support steel member 1 for auxiliary balance support, and to improve the structural strength of the I-shaped support steel member 1 and further support the cold-bent steel beam 2 and the entire component. The inner cavity of the auxiliary support steel pipe 8 is connected with the casting cavity, and steel bars are laid at the same time. The inner cavity of the auxiliary support steel pipe 8 and the two casting cavities can be poured with concrete through the casting openings 4 and It solidifies into a whole, and the solidified concrete can bond with the steel bars and prestressed steel wires 6. The prestressed steel wires 6 enhance the tensile strength of the structure, while the combination of the steel bars and concrete enhances the compressive strength, making the entire structure more balanced and stable when bearing loads. In particular, the close combination of the concrete and the cold-bent steel beams 2 and the auxiliary support steel pipes 8 improves the overall structural strength while effectively avoiding the loosening, falling off or damage of the I-shaped support steel parts 1, the cold-bent steel beams 2 and the auxiliary support steel pipes 8, thereby reducing maintenance costs and potential dangers and greatly enhancing the rigidity and stability of the structural components.

[0041] In the above technical solution, the cold-bent steel beam 2 includes an S-shaped steel plate frame 21 and a lower C-shaped frame plate 22 and an upper C-shaped frame plate 23 which are relatively embedded and arranged on both sides of the S-shaped steel plate frame 21. Two inner frame cavities 210 are distributed on both sides of the S-shaped steel plate frame 21. The lower C-shaped frame plate 22 is embedded and arranged by the inner frame cavity 210 on the lower side of the S-shaped steel plate frame 21 to form a lower casting cavity 220. The upper C-shaped frame plate 23 is embedded and arranged by the inner frame cavity 210 on the upper side of the S-shaped steel plate frame 21 to form an upper casting cavity 220. The cavity 230 is the two casting cavities described above, and a lower bottom plate 31 is provided on the lower side of the end steel plate frame 3. The lower bottom plate 31 corresponds to the lower side of the casting opening 4, and the lower bottom plate 31 can be tightly inserted into the lower side of the lower casting cavity 220 to be sealed, so as to avoid leakage from the bottom of the end steel plate frame 3 during the later casting of concrete. The lower casting cavity 220 and the upper casting cavity 230 are connected with the cavity of the auxiliary support steel pipe 8, and can be tightly combined with each component after the concrete is filled. , improves the overall rigidity and stability of the structure, and significantly improves the construction efficiency. Both ends of the lower pouring cavity 220 and the upper pouring cavity 230 are connected to the pouring opening 4 to facilitate the later pouring of concrete. The structure is not only simple and ingenious, but also easy to assemble and use. The lower C-shaped frame plate 22 and the upper C-shaped frame plate 23 are slid and pushed into the corresponding inner frame cavity 210. After being pushed in, two rectangular steel structures with strong support can be directly formed to cooperate with concrete, which is beneficial to improve the overall support strength of the cold-bent steel beam 2; wherein a layer of steel mesh 24 is laid on the inner bottom of the lower C-shaped frame plate 22 and the upper C-shaped frame plate 23, and this layer of steel mesh 24 can be pushed into the pouring cavity 220 and the upper pouring cavity 230 along with the lower C-shaped frame plate 22 and the upper C-shaped frame plate 23. The combination of the steel mesh 24 and the concrete improves the compressive strength of the concrete in the lower pouring cavity 220 and the upper pouring cavity 230, so that the entire structure is more balanced when bearing load;

[0042] In addition, two connecting ports 25 corresponding to the tube cavity of the auxiliary supporting steel pipe 8 are respectively provided on both sides of the bottom of the lower C-shaped frame plate 22 and the S-shaped steel plate frame 21. L-shaped steel bars 9 are provided on the inner sides of the tube cavity of the auxiliary supporting steel pipe 8 and the lower casting cavity 220. The L-shaped steel bars 9 can enter the lower casting cavity 220 through the connecting ports 25. The upper side of the L-shaped steel bars 9 rests on the steel mesh 24 of the lower C-shaped frame plate 22, which can improve the bending strength and overall stability of the concrete inside the tube cavity of the auxiliary supporting steel pipe 8 and the inner side of the cold-bent steel beam 2.

[0043] It is further designed that after the lower C-shaped frame plate 22 and the upper C-shaped frame plate 23 are embedded in the S-shaped steel plate frame 21 and assembled, eight groups of transverse connecting rods 7 are respectively penetrated horizontally in the middle of the lower C-shaped frame plate 22 and the upper C-shaped frame plate 23, and then locked by nuts. The eight groups of transverse connecting rods 7 are respectively distributed in the middle of the lower casting cavity 220 and the upper casting cavity 230, among which the two groups of transverse connecting rods 7 on the front and rear sides of the cold-bent steel beam 2 are simultaneously inserted into the two sides of the two end steel plate frames 3 and locked with nuts for secondary fixation. Therefore, the cold-bent steel beam 2 is composed of the lower C-shaped frame plate 22 and the upper C-shaped frame plate 23 which are slidably embedded in the inner frame cavity 210 of the S-shaped steel plate frame 21, and are fixed to each other with the end steel plate frames 3 of the two I-shaped supporting steel parts 1 through multiple groups of transverse connecting rods 7, so that an overall stable and high-strength frame structure is formed, and no on-site welding is required, and the assembly can be quickly completed only by fixing with bolts and nuts. The structure is fixed, and has the characteristics of stable structure, convenient installation, high strength and excellent earthquake resistance. Each group of transverse connecting rods 7 is composed of two transverse connecting rods 7 arranged in parallel with each other, and both ends of each transverse connecting rod 7 are screwed and connected to both sides of the cold-bent steel beam 2 by nuts. After the end steel plate frame 3 is sleeved on the assembled cold-bent steel beam 2, it is transversely penetrated and locked by multiple groups of transverse connecting rods 7. Each transverse connecting rod 7 penetrates the inner side of the lower casting cavity 220 and the upper casting cavity 230 and is bonded to the concrete. The close combination of the concrete and the transverse connecting rod 7 effectively prevents the transverse connecting rod 7 from loosening or detaching under the action of external force, thereby ensuring the long-term stability and safety of the structure.

[0044] Side steel plates 10 are respectively attached to both sides of the cold-bent steel beam 2, and the two side steel plates 10 are respectively tightly attached to the two sides of the S-shaped steel plate frame 21 and the outer sides of the lower C-shaped frame plate 22 and the upper C-shaped frame plate 23, and are penetrated by the transverse connecting rod 7 and locked with nuts. The lower C-shaped frame plate 22 and the upper C-shaped frame plate 23 embedded in both sides of the S-shaped steel plate frame 21 are integrally tightened by the side steel plates 10. In this way, even if one row of transverse connecting rods 7 and nuts of the lower C-shaped frame plate 22 or the upper C-shaped frame plate 23 is completely detached, the side steel plates 10 will be locked by the other row of transverse connecting rods 7 and nuts, and the lower C-shaped frame plate 22 and the upper C-shaped frame plate 23 will continue to be tightened and not easily slip out of the S-shaped steel plate frame 21, thereby further improving the connection stability.

[0045] In this embodiment, each prestressed steel wire 6 is respectively passed through between two parallel transverse connecting rods 7 of each group, wherein four shuttle-shaped steel pieces 62 are arranged in the middle of each prestressed steel wire 6, and the diameter of the shuttle-shaped steel piece 62 gradually decreases from the middle to the two ends, and each shuttle-shaped steel piece 62 is respectively arranged between the two groups of transverse connecting rods 7, and the diameters of the two ends of the shuttle-shaped steel piece 62 are smaller than the spacing between the two parallel transverse connecting rods 7 of each group, and can be inserted into the spacing, while the diameter of the middle part of the shuttle-shaped steel piece 62 is larger than the spacing between the two parallel transverse connecting rods 7. The advantage of such a design is that, on the one hand, the shuttle-shaped steel piece 62 can be wrapped by the solidified concrete to form a mechanical bite, thereby enhancing the bonding force between the prestressed steel wire 6 and the concrete, and the combined use of the shuttle-shaped steel piece 62 and the prestressed steel wire 6, as well as the close bonding with the concrete, enhances the ductility and toughness of the structure;

[0046] On the other hand, when the prestressed steel wire 6 is bent and deformed, the shuttle-shaped steel component 62 can effectively convert this deformation force into an oblique force, that is, the inclined surface of the outer end of the shuttle-shaped steel component 62 gradually pulls toward the opposite side of the two upper and lower distributed transverse connecting rods 7 and simultaneously supports outward, dispersing the force to the concrete on the outside of the transverse connecting rods 7, avoiding local stress concentration, and improving the overall stability and bearing capacity of the structure.

[0047] The present invention also includes a stress monitoring device for a steel structure support used in the construction of a large venue. The stress monitoring device 5 includes a stress sensor 51, an elastic mounting rod 52, and eight infrared sensors 53 installed on both sides of the elastic mounting rod 52. The stress sensor 51 is installed in the middle position of the lower side of the cold-bent steel beam 2 for direct detection. The stress sensor 51 is a vibrating string sensor, and other sensors that can detect stress on the installation surface can also be used. The elastic mounting rod 52 and the infrared sensor 53 are both spaced below the cold-bent steel beam 2, and the infrared sensor 53 is set toward the bottom surface of the cold-bent steel beam 2. The closer the infrared sensor 53 is to the cold-bent steel beam 2, the more accurate and stable the detection distance is. The two ends of the elastic mounting rod 52 are installed on the opposite side of the I-shaped support steel member 1, and the stress sensor 51 is staggered with the elastic mounting rod 52 and the infrared sensor 53 to avoid the cold-bent steel beam 2 being deformed downward and squeezed by the elastic mounting rod 52 and the infrared sensor 53 to cause damage.

[0048] Furthermore, a slide groove 54 is vertically provided on the opposite side of the two I-shaped supporting steel parts 1, and a support spring 55 is installed at the bottom of the slide groove 54. Both ends of the elastic mounting rod 52 are slidably installed in the slide groove 54 and connected to the support spring 55. This design allows the elastic mounting rod 52 to slide downward to prevent the elastic mounting rod 52 from being pushed when the middle part of the cold-bent steel beam 2 is bent under force or displaced downward. The elastic design allows the elastic mounting rod 52 to be pushed downward on the slide groove 54 to avoid wear of the elastic mounting rod 52 and affecting the use of the infrared sensor 53.

[0049] Specific installation and use methods:

[0050] S1. Assembling the cold-bent steel beam 2: placing the S-shaped steel plate frame 21 of the cold-bent steel beam 2 on the front and rear two I-shaped supporting steel members 1, laying the inner sides of the upper C-shaped frame plate 23 and the lower C-shaped frame plate 22 with steel mesh 24 and inserting the prestressed steel wire 6, and then directly embedding the upper C-shaped frame plate 23 and the lower C-shaped frame plate 22 in the two inner frame cavities 210 of the S-shaped steel plate frame 21 to form an upper casting cavity 230 and a lower casting cavity 220;

[0051] S2. Preliminary fixation of the cold-bent steel beam 2: nest the two end steel plate frames 3 on both sides of the assembled cold-bent steel beam 2, so that the bottom of the lower bottom plate 31 is close to the bottom of the lower casting cavity 220 for sealing, and each prestressed steel wire 6 is inserted into the outer side of the two end steel plate frames 3 for tensioning, and then fixed with anchors 61, so that each prestressed steel wire 6 is tightened in the upper casting cavity 230 and the lower casting cavity 220, and at this time, the two end steel plate frames 3 will also be pressed against the front and rear ends of the cold-bent steel beam 2 by the action of the prestressed steel wire 6 for preliminary limiting, and then the end steel plate frames 3 are locked to the top of the I-shaped support steel member 1 by bolts;

[0052] S3, secondary fixed cold-bent steel beam 2: The lower C-shaped frame plate 22 and the upper C-shaped frame plate 23 on the S-shaped steel plate frame 21 are respectively penetrated from both sides by eight sets of transverse connecting rods 7 through the lower casting cavity 220 and the upper casting cavity 230, and are locked with nuts. The four sets of transverse connecting rods 7 in the middle are Two side steel plates 10 are fixedly penetrated, so that the side steel plates 10 are completely attached to the two sides of the cold-bent steel beam 2 to further limit the lower C-shaped frame plate 22 and the upper C-shaped frame plate 23. The two groups of transverse connecting rods 7 on the front and rear sides of the cold-bent steel beam 2 synchronously penetrate the end steel plate frame 3 and lock and connect them. This can further improve the overall connection and locking effect. When each group of upper and lower transverse connecting rods 7 penetrates the lower casting cavity 220 and the upper casting cavity 230, it is necessary to pass through the upper and lower sides of the taut prestressed steel wire 6 respectively, so that the inclined surfaces on both sides of the shuttle-shaped steel member 62 are in contact with the opposite side of the adjacent upper and lower transverse connecting rods 7, so that the shuttle-shaped steel member 62 is limited front and rear between the two groups of transverse connecting rods 7;

[0053] S3. Installation of the auxiliary support steel pipe 8: Before the auxiliary support steel pipe 8 is installed, four L-shaped steel bars 9 can be inserted and arranged on the tube cavity of the auxiliary support steel pipe 8, and then the tops of the four L-shaped steel bars 9 pass through the connecting opening 25 upward into the lower casting cavity 220 and are connected to the steel mesh 24, and then the top tube cavity of the auxiliary support steel pipe 8 is corresponding to the connecting opening 25 of the lower C-shaped frame plate 22 and the S-shaped steel plate frame 21, and screwed to complete the assembly and fixation of the entire steel structure;

[0054] S4, pouring concrete into the upper pouring cavity 230, the lower pouring cavity 220 and the inner cavities of the four auxiliary support steel pipes 8 through the pouring opening 4, so as to form an integral concrete structure, and the concrete is respectively bonded to the steel mesh 24, the prestressed steel wire 6, the shuttle steel member 62, the transverse connecting rod 7, the L-shaped steel bar 9, and forms an integral composite structural member together with the steel structure of the external I-shaped support steel member 1, the cold-bent steel beam 2 and the end steel plate frame 3;

[0055] S5. During the installation of the above-mentioned I-shaped support steel members 1, multiple I-shaped support steel members 1 can be stacked together and bolted according to the use requirements to meet the installation height requirements, and the auxiliary support steel pipes 8 installed on the upper and lower corresponding I-shaped support steel members 1 can be connected, and the inner cavity of the auxiliary support steel pipe 8 can also be sleeved on the steel bars on the foundation pile, and after the internal concrete solidifies, it can also form an integral auxiliary support to improve the support effect;

[0056] S6. Installation and use of the stress monitoring device 5. The stress sensor 51 installed at the bottom of the cold-bent steel beam 2 can detect the entire stress of the cold-bent steel beam 2 in real time. At the same time, the elastic mounting rod 52 is elastically installed on the opposite side of the two I-shaped supporting steel parts 1 through the supporting spring 55. The multiple infrared sensors 53 distributedly installed on the elastic mounting rod 52 are used to detect the distance of various parts of the bottom surface of the cold-bent steel beam 2. The bending changes of the cold-bent steel beam 2 are determined by different spacing distances, and the data is fed back to the background monitoring equipment in real time.

[0057] It should be noted that the prestressed composite building component for a terminal building of the present invention mainly improves the above-mentioned structure, and the functions, components and structures not mentioned therein can be implemented by using components and structures in the prior art that can realize the corresponding functions.

[0058] The present invention has been described in detail above through specific embodiments, but these do not constitute limitations of the present invention. Without departing from the principle of the present invention, those skilled in the art may also make many variations and improvements, which should also be considered as the protection scope of the present invention.

Claims

1. A prestressed composite building component for a terminal building, characterized in that: It comprises a cold-bent steel beam (2) and an I-shaped support steel member (1) supported at both ends of the cold-bent steel beam (2), the upper sides of the two I-shaped support steel members (1) being locked with end surface steel plate frames (3), and the two end surface steel plate frames (3) being respectively sleeved and locked with the two ends of the cold-bent steel beam (2); The cold-bent steel beam (2) is provided with two separate casting cavities on the inner side, and a plurality of prestressed steel wires (6) are longitudinally penetrated through the middle of the inner sides of the two casting cavities respectively, and the two ends of the prestressed steel wires (6) respectively penetrate the outer sides of the two end steel plate frames (3) and are fixed with anchors (61); Casting openings (4) are arranged at intervals between the two end steel plate frames (3) and the upper edges of both ends of the cold-bent steel beam (2), and the casting openings (4) are arranged in communication with the two casting cavities; Auxiliary support steel pipes (8) are respectively vertically locked on both sides of the I-shaped support steel member (1); the inner tube cavity of the auxiliary support steel pipe (8) is connected to the casting cavity and is provided with steel bars; The inner tube cavity of the auxiliary support steel pipe (8) and the two casting cavities can be poured with concrete through the casting opening (4) and solidified into a whole, and the solidified concrete can be bonded to the steel bars and the prestressed steel wires (6).

2. The prestressed composite building component for a terminal building according to claim 1, characterized in that: The cold-bent steel beam (2) comprises an S-shaped steel plate frame (21) and a lower C-shaped frame plate (22) and an upper C-shaped frame plate (23) which are relatively embedded and arranged on both sides of the S-shaped steel plate frame (21); two inner frame cavities (210) are arranged on the upper and lower sides of the S-shaped steel plate frame (21); the lower C-shaped frame plate (22) is embedded and arranged by the inner frame cavity (210) on the lower side of the S-shaped steel plate frame (21) to form a lower casting cavity (220); the upper C-shaped frame plate (23) is embedded and arranged by the inner frame cavity (210) on the upper side of the S-shaped steel plate frame (21) to form an upper casting cavity (230); both ends of the lower casting cavity (220) and the upper casting cavity (230) are connected to the casting opening (4).

3. The prestressed composite building component for a terminal building according to claim 2, characterized in that: A layer of steel mesh (24) is laid on the inner bottom of the lower C-shaped frame plate (22) and the upper C-shaped frame plate (23); two communication ports (25) corresponding to the tube cavity of the auxiliary support steel pipe (8) are respectively provided on both sides of the bottom of the lower C-shaped frame plate (22) and the S-shaped steel plate frame (21); and L-shaped steel bars (9) are provided on the inner sides of the tube cavity of the auxiliary support steel pipe (8) and the lower casting cavity (220); the upper side of the L-shaped steel bars (9) abuts against the steel mesh (24) of the lower C-shaped frame plate (22).

4. The prestressed composite building component for a terminal building according to claim 2, characterized in that: After the lower C-shaped frame plate (22) and the upper C-shaped frame plate (23) are embedded in the S-shaped steel plate frame (21) and assembled, a plurality of groups of transverse connecting rods (7) are transversely penetrated through the middle of the lower casting cavity (220) and the upper casting cavity (230); Each group of transverse connecting rods (7) comprises two transverse connecting rods (7) arranged parallel to each other, and both ends of each transverse connecting rod (7) are locked and connected by nuts, and the end face steel plate frame (3) is sleeved on the assembled cold-bent steel beam (2) and then penetrated and locked transversely by multiple groups of transverse connecting rods (7), and each transverse connecting rod (7) penetrates the inner side of the lower pouring cavity (220) and the upper pouring cavity (230) and is bonded to the concrete.

5. The prestressed composite building component for a terminal building according to claim 4, characterized in that: Side steel plates (10) are respectively attached to both sides of the cold-bent steel beam (2). The two side steel plates (10) are respectively in close contact with both sides of the S-shaped steel plate frame (21) and the outer sides of the lower C-shaped frame plate (22) and the upper C-shaped frame plate (23), and are penetrated by a transverse connecting rod (7) and locked with a nut.

6. The prestressed composite building component for a terminal building according to claim 4, characterized in that: Each of the prestressed steel wires (6) passes through each group of two parallel transverse connecting rods (7), wherein a plurality of shuttle-shaped steel parts (62) are arranged in the middle of the prestressed steel wires (6), and the diameter of the shuttle-shaped steel parts (62) gradually decreases from the middle to the two ends. Each of the shuttle-shaped steel parts (62) is arranged between the two groups of transverse connecting rods (7), and the diameters of the two ends of the shuttle-shaped steel parts (62) are smaller than the spacing between the two parallel transverse connecting rods (7) in each group, while the diameter of the middle of the shuttle-shaped steel parts (62) is larger than the spacing between the two parallel transverse connecting rods (7).

7. The prestressed composite building component for a terminal building according to claim 1, characterized in that: A lower bottom plate (31) is provided at the lower side of the end face steel plate frame (3), and the lower bottom plate (31) corresponds to the lower side of the casting opening (4), and the lower bottom plate (31) can be tightly inserted into the lower side of the lower casting cavity (220) for sealing.

8. A stress monitoring device for a prestressed composite building component of a terminal building as claimed in claim 1, characterized in that: The stress monitoring device (5) comprises a stress sensor (51), an elastic mounting rod (52), and a plurality of infrared sensors (53) mounted on both sides of the elastic mounting rod (52); the stress sensor (51) is staggered with the elastic mounting rod (52) and the infrared sensor (53); the stress sensor (51) is mounted at the middle position of the lower side of the cold-bent steel beam (2) for direct detection; the elastic mounting rod (52) and the infrared sensor (53) are both spaced below the cold-bent steel beam (2), and the infrared sensor (53) is arranged toward the bottom surface of the cold-bent steel beam (2); the two ends of the elastic mounting rod (52) are mounted on opposite sides of the I-shaped support steel member (1); the two opposite sides of the I-shaped support steel members (1) are respectively provided with slide grooves (54) vertically; a support spring (55) is mounted at the bottom of the slide groove (54); the two ends of the elastic mounting rod (52) are slidably mounted in the slide groove (54) and are connected to the support spring (55).

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