Fully-fabricated steel beam-composite floor slab system for deep sea island reef and construction method

Abstract

The invention relates to a full-fabricated steel beam-composite floor system for a deep sea island and a construction method. The full-assembly type steel beam-composite floor slab system comprises a steel plate bottom plate; a flat-bulb steel top plate; a steel belt truss web member; the longitudinal prestressed tendons are uniformly arranged on the steel plate bottom plate at intervals; the transverse stress ribs are uniformly arranged on the longitudinal prestressed ribs at intervals, and the two ends of each transverse stress rib are reserved by a certain length and extend out of the steel plate bottom plate; the flat-bulb steel top plate is connected with an upper flange of the steel beam in a butt welding mode, the steel belt truss web members are connected with the steel beam in a welding mode, the steel plate bottom plate is connected with the steel beam through angle steel connecting piece bolts, and the transverse stress ribs penetrate through the steel beam and are fixed to the steel beam. The stress and deflection of the structure are controlled through combination of the flat-bulb steel, the steel belt trusses and the prestressed tendons, and rapid installation and deployment of the structure can be achieved through full-assembly type dry operation so as to meet the construction requirements of deep sea islands and reefs.

Description

Technical Field

[0001] The invention relates to the field of assembled steel structure buildings, and in particular to a fully assembled steel beam-combined floor slab system and a construction method for deep-sea islands and reefs. Background Art

[0002] Deep-sea islands and reefs are of great significance in national strategy, marine mineral resource development, marine environmental scientific research, etc. At present, the construction of traditional deep-sea islands and reefs is still mainly based on reinforced concrete materials, which have problems such as corrosion and cracking of reinforced concrete, complex maintenance, and non-reusability. In addition, deep-sea islands and reefs are far away from the land, with complex terrain and hydrology, harsh environment, difficult transportation of construction materials, and basically no large ships can dock. There is a shortage of large-scale construction equipment on the island, and infrastructure construction is seriously lagging behind, which cannot meet the needs of the national development strategy.

[0003] Therefore, there is an urgent need for a building structure that is simple to construct and can be quickly deployed for use in deep-sea island and reef construction. Summary of the invention

[0004] Based on the above problems, the present invention provides a fully assembled steel beam-combined floor system and construction method for deep-sea islands and reefs. The force and deflection of the structure are controlled by combining bulb flat steel, steel belt trusses and prestressed tendons. The construction process of the floor is a completely dry operation state, and the floor and beams are connected by on-site welding for quick assembly, which can realize the rapid installation and deployment of the structure to meet the construction needs of deep-sea islands and reefs.

[0005] The technical solution of the present invention is as follows:

[0006] In a first aspect, the present invention provides a fully assembled steel beam-composite floor system for deep sea islands and reefs, comprising:

[0007] Steel plate bottom plate;

[0008] The bulb flat steel top plate is made of a plurality of continuously arranged bulb flat steels connected by butt welding;

[0009] The steel belt truss web member is formed by arranging a plurality of steel belts according to a certain rule to form a truss web member structure, and the top end of the steel belt is welded and fixed to the bulb flat steel top plate, and the bottom end of the steel belt is welded and fixed to the steel plate bottom plate;

[0010] Longitudinal prestressed tendons are evenly spaced and arranged on the steel plate bottom plate, and are anchored and fixed at both ends of the steel plate bottom plate;

[0011] Transverse force-bearing bars are evenly spaced and arranged on the longitudinal prestressed bars, and a certain length is reserved at both ends of the transverse force-bearing bars to extend out of the bottom plate of the steel plate; and

[0012] The steel beam, the bulb flat steel top plate at the transverse edge is butt-welded to the upper flange of the steel beam, the steel belt truss web at the transverse edge is welded to the steel beam, the steel plate bottom plate is bolted to the steel beam through an angle steel connector, and the transverse force reinforcement passes through the steel beam and is fixed to the steel beam.

[0013] In this embodiment, the force and deflection of the structure are controlled by combining the bulb flat steel, steel belt truss and prestressed tendons. The bulb flat steel ball head can be used as a stiffening rib of the top plate to improve its stability and bearing capacity, and can be used as the upper chord of the truss to connect the web of the steel belt truss. The steel belt truss transmits shear force more directly and has a higher shear bearing capacity. The steel belt and the bulb flat steel ball head cooperate, and the contact area between the two is larger, which is convenient for welding and connecting. The bidirectional force-bearing steel bar is combined with the steel belt truss to realize the function of the bidirectional plate, which has good bidirectional force-bearing performance, and transmits force to the bidirectional support at the same time to control the bidirectional deflection deformation of the structure.

[0014] In some embodiments, a plurality of continuously arranged bulb flat steels are arranged longitudinally or transversely, and every two bulb flat steels form a group, and the ball heads of the bulb flat steels are adjacently butt-welded.

[0015] In this embodiment, the arrangement method of arranging two adjacent ball flat steels as a group can increase the overall area of ​​the ball head, which is convenient for welding with the steel belt. At the same time, when the angle of the steel belt remains unchanged, the floor height can be increased compared to the arrangement method of arranging each ball flat steel in the same direction, thereby improving its bearing capacity.

[0016] In some embodiments, the longitudinal prestressed tendons and the transverse force-bearing tendons are evenly arranged to form a consistent rectangular grid, and multiple steel strips are grouped into a four-sided pyramid configuration, wherein two of the groups are welded and fixed at the top ends to a group of spherical flat steel ball heads, and the other two groups are welded and fixed at the top ends to an adjacent group of spherical flat steel ball heads. The bottom ends of the steel strips converge at the intersection of the longitudinal prestressed tendons and the transverse force-bearing tendons, and are welded to the bottom plate of the steel plate. The longitudinal prestressed tendons are located between the two groups of steel strips arranged along the transverse direction, and the transverse force-bearing tendons are located between the two groups of steel strips arranged along the longitudinal direction.

[0017] In this embodiment, the longitudinal and transverse force-bearing bars are arranged in a staggered manner to form a cross-shaped steel grid, which is convenient for the installation and positioning of the steel belts, and can play a good restraining role on the steel belts in the grid when the load acts. The steel belts are also arranged longitudinally and transversely, and each group of four steel belts forms a four-sided pyramid configuration. The top ends of the four steel belts are welded to the two adjacent groups of flat steel ball heads, and the bottom ends converge at the intersection of the longitudinal prestressed bars and the transverse force-bearing bars, forming a solid spatial three-dimensional truss support structure.

[0018] In some embodiments, the steel strips are symmetrically arranged in the transverse direction with the longitudinal prestressed tendons as the axis, and are continuously arranged in the longitudinal direction at an angle of 60° with the bulb flat steel top plate.

[0019] In this embodiment, this arrangement method can ensure that the force on the floor is uniform and the force transmission path is reasonable.

[0020] In some embodiments, an anchor plate with through holes is welded at the longitudinal edge of the steel plate bottom plate, and the longitudinal prestressed tendons pass through the through holes and are anchored to the anchor plate with anchors.

[0021] In this embodiment, the longitudinal prestressed tendons are pre-anchored and fixed to the steel plate bottom plate, forming an integral body with the steel plate bottom plate, which is convenient for prefabrication and modular production.

[0022] In some embodiments, the bulb flat steel top plate is missing a bulb flat steel at the upper flange corresponding to the steel beam, and is butt-welded to the upper flange of the steel beam via a connecting plate.

[0023] In this embodiment, a hole is opened at the edge of the bulb flat steel top plate, so that the outermost edge steel strip is welded to the beam body during assembly, and the transverse force reinforcement is passed through the through holes on the angle steel connector and the web of the steel beam. From the perspective of the stress of the composite floor, the special hole is opened here to effectively transmit the shear force through the web.

[0024] In some embodiments, one side of the angle steel connector is welded and fixed to the side of the steel beam, and the other side is preset with bolt holes. The steel plate bottom plate is overlapped on the other side of the angle steel connector and fixed by bolt connection.

[0025] In this embodiment, with the help of angle steel connectors, as part of the force transmission node between the composite floor and the steel beam, the bending moment is transmitted through the butt weld between the bottom angle steel connector and the top plate, and the shear force is transmitted through the web member. At the same time, the angle steel connectors facilitate the temporary erection of the composite floor and facilitate the welding of the steel belt trusses at the edge to the web of the steel beam.

[0026] In some embodiments, the steel beam is a box-type steel beam, and a through hole is preset on the web of the box-type steel beam. The transverse force-bearing reinforcement passes through the through hole and is anchored on the outer side of the web of the box-type steel beam.

[0027] In this embodiment, the box-type steel beam has high rigidity and section inertia moment, ensuring that the steel plate bottom plate and the bulb flat steel top plate can effectively transmit bending moment, while providing a strong guarantee for the anchoring of the ends of the transverse force reinforcement.

[0028] In some embodiments, steel beam stiffening ribs are welded inside the box shape of the box-shaped steel beam, and the steel beam stiffening ribs correspond to the positions of the steel plate bottom plate.

[0029] In this embodiment, the steel beam stiffening ribs ensure the strength and stability of the transverse force reinforcement bars when they are anchored.

[0030] In a second aspect, the present invention provides a construction method of the fully assembled steel beam-composite floor system, comprising the following steps:

[0031] S10, factory prefabricated:

[0032] S101, longitudinal prestressed tendons are arranged on the steel plate bottom plate and connected to the steel plate bottom plate through anchors and prestressed, and then transverse force-bearing tendons are arranged on the longitudinal prestressed tendons;

[0033] S102, welding one end of the steel strip to the ball head of each bulb flat steel, welding the other end of the steel strip to the steel plate bottom plate, continuing to install adjacent bulb flat steels and steel strips according to this step, and then butt welding the bulb flat steels to form a bulb flat steel top plate;

[0034] S20, Field Assembly:

[0035] S201, connect one side of the angle steel connector to the web of the steel beam, then place the composite floor slab on the angle steel connector, pass the transverse force reinforcement through the angle steel connector and the web of the steel beam, and connect the steel plate bottom plate to the other side of the angle steel connector by single-side bolts;

[0036] S202, anchor the transverse force reinforcement on the steel beam, and weld the steel belt truss web extending from the edge of the composite floor slab to the steel beam;

[0037] S203, connect the connecting plate to the bulb flat steel top plate and the upper flange of the steel beam by butt welding.

[0038] In this embodiment, the structure of the combined floor slab in the construction method is prefabricated as a whole in the factory, and is quickly assembled and connected with the frame beam on site, so that the entire construction process of the entire beam-slab system is in a dry operation state, which can realize the rapid installation and deployment of the structure and meet the construction needs of deep-sea islands and reefs.

[0039] The beneficial effects of the present invention compared to the prior art are as follows: the present invention proposes a fully assembled steel beam-composite floor system and construction method for deep-sea islands and reefs, in which the stress and deflection of the structure are controlled by steel belt trusses and prestressed tendons, and the structure of the composite floor is prefabricated as a whole in the factory, and is quickly assembled and connected with the frame beam on site, so that the entire beam-slab system construction process is in a dry operation state, while achieving the purpose of rapid construction and deployment of the building structure.

[0040] In addition, prestressed steel bars are used in the present invention to control the deflection of the composite floor slab. Considering that the application of bidirectional prestress may cause local excessive compression and stress concentration of the floor slab, thereby causing local failure of the floor slab, and construction errors are prone to occur, resulting in uneven prestress loss. At the same time, temperature, friction, etc. may cause greater prestress loss. Therefore, only prestress is applied to the longitudinal steel bars, and although prestress is not applied to the transverse steel bars, the transverse steel bars are passed through the steel beams and fixed to control the deflection deformation in two directions. This not only solves the problems of excessive compression and stress concentration of the floor slab, but also realizes the control of the deflection deformation of the floor slab in both directions.

[0041] It should be understood that the implementation of any embodiment of the present invention does not mean that multiple or all of the above-mentioned beneficial effects must be possessed or achieved at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0043] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0044] Figure 1 A schematic diagram of a composite floor structure according to an embodiment of the present invention;

[0045] Figure 2 It is a schematic diagram of the installation of a group of bulb flat steel and steel belt according to one embodiment of the present invention;

[0046] Figure 3 It is a schematic diagram of assembling a group of bulb flat steel and steel strip according to one embodiment of the present invention;

[0047] Figure 4 This is a schematic diagram of the installation position of the composite floor slab and the steel beam according to one embodiment of the present invention;

[0048] Figure 5 This is a schematic diagram of the assembly connection between a composite floor slab and a steel beam according to an embodiment of the present invention;

[0049] Figure 6 This is a schematic diagram of a bulb flat steel structure according to an embodiment of the present invention;

[0050] Figure 7 This is a schematic diagram of the connection between the longitudinal prestressed tendons and the steel plate bottom plate according to one embodiment of the present invention.

[0051] Description of reference numerals:

[0052] 1-Steel plate bottom plate; 2-Longitudinal prestressed tendons; 3-Transverse force tendons; 4-Steel belt truss web; 5-Bullet flat steel top plate; 51-Bullet flat steel web; 52-Bullet flat steel ball head; 6-Steel beam; 7-Anchor plate; 8-Anchor; 9-Angle steel connector; 10-Single-sided bolt; 11-Connecting plate; 12-Steel beam stiffening rib.

[0053] The same or corresponding symbols in the drawings indicate the same or corresponding parts. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in conjunction with the embodiments and drawings. Here, the illustrative embodiments of the present invention and their description are used to explain the present invention, but are not intended to limit the present invention.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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.

[0056] It should be understood that the terms "include / comprise", "consist of..." or any other variations are intended to cover non-exclusive inclusion, so that a product, device, process or method that includes a series of elements includes not only those elements, but also may include other elements not explicitly listed when necessary, or also includes elements inherent to such product, device, process or method. In the absence of more restrictions, the elements defined by the sentence "include / comprise...", "consist of..." do not exclude the presence of other identical elements in the product, device, process or method that includes the elements.

[0057] It is also necessary to understand that terms such as "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside" and "outside" to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device, component or structure must have a specific direction, be constructed or operate in a specific direction, and should not be understood as a limitation on the present invention.

[0058] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0059] "Deep-sea islands and reefs" are far away from the land, with complex terrain and hydrology, harsh environment, difficult transportation of building materials, large ships basically unable to dock, shortage of large construction equipment, and serious lag in infrastructure construction. In view of this, the present invention designs a fully assembled steel beam-combined floor system to meet the requirements of rapid construction and deployment of building structures on deep-sea islands and reefs.

[0060] The implementation of the present invention is described in detail below in conjunction with preferred embodiments.

[0061] like Figure 1-7 As shown, an embodiment of the present invention provides a fully assembled steel beam-composite floor system for deep-sea islands and reefs, including: a steel plate bottom plate 1, longitudinal prestressed tendons 2, transverse force-bearing tendons 3, steel belt truss webs 4, a bulb flat steel top plate 5 and a steel beam 6.

[0062] Specifically, the steel plate bottom plate 1 adopts a steel plate structure, preferably a whole steel plate, as the bottom support structure of the entire composite floor.

[0063] The bulb flat steel top plate 5 is formed by connecting a plurality of continuously arranged bulb flat steels by butt welding; the bulb flat steel used in shipbuilding is introduced into the floor system, such as Figure 6 As shown, the bulb flat steel is a special steel, which is composed of a flat bulb flat steel web 51 and a spherical bulb flat steel ball head 52, and is an asymmetric steel. The bulb flat steel ball head 52 is downward, which can be used as a stiffening rib of the top plate to improve its stability and bearing capacity, and can be used as the upper chord of the truss to connect the steel belt truss web 4. In addition, the bulb flat steel is low in price, and the use of the top plate can save the cost.

[0064] In a preferred embodiment, the bulb flat steel top plate 5 is formed by butt welding a plurality of bulb flat steels with adjacent and continuous ball heads, and each two bulb flat steels with adjacent ball heads form a group. A plurality of continuously arranged bulb flat steels are arranged longitudinally, butt-welded in groups of two, and each group is also welded to form a bulb flat steel top plate 5. The arrangement method of forming a group of bulb flat steels with two adjacent ball heads can increase the overall area of ​​the ball heads, which is convenient for welding with the steel strip. At the same time, when the angle of the steel strip remains unchanged, the floor height can be increased compared to the arrangement method of arranging each bulb flat steel in the same direction, thereby improving its bearing capacity. In order to ensure the continuity and rationality of the force transmission path, the welds of the top plate are preferably all on the same plane, that is, welded at the joints of the plate. In addition, a plurality of continuously arranged bulb flat steels can also be arranged horizontally.

[0065] Continue to see Figure 1 The steel belt truss web member 4 is formed by a truss-type web member structure by multiple steel belts arranged according to certain rules, and the top end of the steel belt is welded and fixed to the bulb flat steel top plate 5, and the bottom end of the steel belt is welded and fixed to the steel plate bottom plate 1; compared with the traditional steel bar truss, the steel belt truss can save steel and reduce the dead weight of the structure, and the steel belt cooperates with the bulb flat steel ball head, the contact area between the two is larger, and it is convenient to weld and connect with them.

[0066] like Figure 1 , Figure 2 As shown, the longitudinal prestressed tendons 2 are evenly spaced in the transverse direction on the steel plate bottom plate 1, and the specific spacing distance is determined according to the design requirements. The longitudinal prestressed tendons 2 are anchored and fixed at both ends of the steel plate bottom plate 1, and prestress is applied.

[0067] Better, such as Figure 7 As shown, the steel plate bottom plate 1 is welded with an anchor plate 7 with a through hole at the longitudinal edge, and the longitudinal prestressed tendons 2 pass through the through holes and are anchored on the anchor plate 7 with anchors 8. The longitudinal prestressed structure is formed by applying prestress to the longitudinal prestressed tendons 2 in advance and anchoring and fixing them with anchors 8.

[0068] Continue to see Figure 1 , Figure 2 The transverse force reinforcements 3 are evenly spaced in the longitudinal direction, and the specific spacing distance is determined according to the design requirements, that is, the longitudinal prestressed reinforcements 2 and the transverse force reinforcements 3 are arranged crisscrossed, and the transverse force reinforcements 3 are arranged on the longitudinal prestressed reinforcements 2, but are not connected and fixed to the longitudinal prestressed reinforcements 2. The present invention arranges longitudinal prestressed steel bars and combines them with steel belt trusses to control the longitudinal deflection and deformation. At the same time, considering that the application of bidirectional prestress may cause local excessive compression and stress concentration of the floor slab, thereby causing local failure of the floor slab, and construction errors are prone to occur, resulting in uneven prestress loss. At the same time, temperature, friction, etc. may cause greater prestress loss. Therefore, the present invention only applies prestress to the longitudinal steel bars. In order to realize the function of the two-way slab, the transverse steel bars adopt conventional force-bearing bars but are not arranged in a conventional manner. Instead, they are passed through the steel beams and anchored on the steel beams to control the deflection and deformation in two directions. It has good bidirectional force-bearing performance and transmits force to the bidirectional supports at the same time, which not only solves the problems of excessive compression and stress concentration of the floor slab, but also realizes the control of the bidirectional deflection and deformation of the floor slab. It is different from the common one-way floor decking. At present, most steel truss floor deckings are still one-way slabs with steel trusses arranged at intervals.

[0069] In addition, a certain length is reserved at both ends of the transverse force reinforcement 3 to extend out of the steel plate bottom plate 1, such as Figure 1As shown, the bulb flat steel top plate 5 is butt-welded to the upper flange of the steel beam 6 at its transverse edge. Butt welding can ensure that the entire floor is a plane, which meets the use requirements, avoids the upward protrusion caused by the bolted connection plate, and does not require additional leveling steps. The steel belt truss web 4 is welded to the steel beam 6 at its transverse edge, specifically welded at the corresponding position of the beam body, the steel plate bottom plate 1 is bolted and fixed to the steel beam 6, and the transverse force reinforcement 3 passes through the steel beam 6 and is fixed to the outside of the steel beam 6 with an anchor 8.

[0070] At the connection position between the steel plate bottom plate 1 and the steel beam 6, since it is the bottom position, if welding is used, it can only be an upward angle weld, which is difficult to construct and the quality is difficult to guarantee. In view of this, the embodiment of the present invention uses an angle steel connector 9, one side of the angle steel connector 9 is attached to the beam body of the steel beam 6 and welded and fixed, and the other side of the angle steel connector 9 is preset with bolt holes. The edge of the steel plate bottom plate 1 is correspondingly provided with bolt holes, and is overlapped with the other side of the angle steel connector 9 and fixed with a single-sided bolt 10. It should be noted that a through hole is pre-opened on the side of the angle steel connector 9 attached to the steel beam 6, and a through hole is also correspondingly opened on the beam body (web) of the steel beam 6 for the transverse force reinforcement 3 to pass through.

[0071] In the present invention, see Figure 1-3 The longitudinal prestressed tendons 2 and the transverse force-bearing tendons 3 are evenly arranged to form a consistent rectangular grid, preferably a square grid, that is, the longitudinal prestressed tendons 2 and the transverse force-bearing tendons 3 are arranged alternately at equal intervals, and a plurality of steel strips are grouped into a quadrangular pyramid configuration in groups of four, wherein the top ends of the steel strips in a group of two are welded and fixed to a group of spherical flat steel ball heads 52, and the top ends of the steel strips in a group of two are welded and fixed to an adjacent group of spherical flat steel ball heads 52, and the bottom ends of the steel strips converge at the intersection of the longitudinal prestressed tendons 2 and the transverse force-bearing tendons 3, and are welded and connected to the steel plate bottom plate 1, that is, at the four corner points of the square grid, the bottom ends of the four steel strips in the four quadrangular pyramid configuration steel strip groups converge here, and the longitudinal prestressed tendons 2 are located between the two groups of steel strips arranged in the transverse direction, and the transverse force-bearing tendons 3 are located between the two groups of steel strips arranged in the longitudinal direction. With this design, the crisscross steel grid can make the composite floor bear bidirectional forces, that is, the bearing capacity of the floor in two directions is similar, and it is convenient for auxiliary steel belt installation and positioning, and when the load acts, it can play a good restraining role on the steel belt in the grid. The steel belts are also arranged crisscross, and the crisscross arrangement of the steel belts is also to make the composite floor have bidirectional force bearing capacity.

[0072] More specifically, in each steel belt group of a tetrahedral pyramid configuration, the steel belts are symmetrically arranged along the transverse direction with the longitudinal prestressed reinforcement 2 as the axis, and symmetrically arranged along the longitudinal direction with the transverse force reinforcement 3 as the axis, and are continuously arranged at an angle with the bulb flat steel top plate 5, for example, an angle of 60° is more reasonable.

[0073] Continue to see Figure 4 , Figure 5When the composite floor is assembled with the steel beam, the bulb flat steel top plate 5 of the composite floor is on the same horizontal line as the upper flange of the steel beam 6, and a bulb flat steel is missing at the upper flange of the corresponding steel beam 6, that is, no bulb flat steel is configured at this location, so that the internal structure of the composite floor is exposed, and is butt-welded to the upper flange of the steel beam 6 through a connecting plate 11. This design makes it easy to weld the outermost edge of the steel strip to the beam body during assembly, and it is also easy to pass the transverse force reinforcement 3 through the angle steel connector 9 and the through hole on the web of the steel beam 6. After welding and passing are completed, the bulb flat steel top plate 5 is welded to the steel beam 6 through the connecting plate 11, and the assembly is completed. From the perspective of the force on the composite floor, the steel plate bottom plate 1 and the bulb flat steel top plate 5 mainly transmit bending moment, while the shear force is mainly transmitted through the web members. Therefore, a hole is opened at the edge of the bulb flat steel top plate 5, and the steel belt truss web members 4 are welded to the steel beam 6 to ensure a reliable force transmission path. The special hole is opened here to effectively transmit the shear force through the web members.

[0074] In the present invention, the steel beam 6 is preferably a box-type steel beam, and a through hole is preset on the web of the box-type steel beam. The transverse force reinforcement 3 passes through the through hole and is anchored on the outer side of the web of the box-type steel beam, for example, by anchoring with anchors 8 or bolts.

[0075] Further, such as Figure 4 , Figure 5 The box-shaped steel beam has steel beam stiffening ribs 12 welded inside the box-shaped steel beam, and the steel beam stiffening ribs 12 correspond to the position of the steel plate bottom plate 1.

[0076] Finally, the present invention can further provide a tuned mass damper (TMD) installed on the steel plate bottom plate 1 of the composite floor to control the vibration of the floor and improve the comfort of the floor. First, a detailed structural dynamics analysis of the building structure is required to understand its natural frequency and modal characteristics. By simulating the structural response under different conditions, the position where the structure is most likely to resonate is found to install the TMD. According to the results of the structural analysis, the parameters such as the mass, spring stiffness and damping coefficient of the TMD are designed so that the natural frequency of the TMD matches one or more vibration frequencies of the structure to achieve effective vibration control.

[0077] In the present invention, the steel plate bottom plate 1, the longitudinal prestressed tendons 2, the transverse force-bearing tendons 3, the steel belt truss web members 4, and the bulb flat steel top plate 5 are arranged as above to form a composite floor structure, which is prefabricated in a factory in a certain order, thereby improving the efficiency of on-site assembly.

[0078] The present invention provides a construction method for a fully assembled steel beam-combined floor system for deep-sea islands and reefs, comprising the following steps, mainly including factory prefabrication and on-site assembly:

[0079] S10, factory prefabricated:

[0080] S101, connecting the longitudinal prestressed tendons 2 to the steel plate bottom plate 1 through the anchor 8 and applying prestress, and then laying the transverse force-bearing tendons 3 on the longitudinal prestressed tendons 2;

[0081] S102, welding one end of the steel belt of the steel belt truss web member 4 to the bulb head 52 of each bulb flat steel, and connecting the other end of the steel belt to the steel plate bottom plate 1, and then continue to install adjacent bulb flat steels and steel belts according to this step, and then butt-weld the bulb flat steels to form a whole;

[0082] During installation, the longitudinal and transverse steel strips and the lower steel bars are arranged evenly and symmetrically. Therefore, when the plate height and the spacing between steel bars are determined, the length and angle of each steel strip are unique values, which can be obtained through calculation. Then, they are processed in the factory and welded according to this angle, and the welding and installation accuracy can be guaranteed.

[0083] S20, Field Assembly:

[0084] S201, connect one side of the angle steel connector 9 to the web of the box steel beam 7, then place the composite floor slab on the angle steel connector 9, pass the transverse force reinforcement 3 through the through holes on the angle steel connector 9 and the box steel beam 7, and connect the steel plate bottom plate 1 to the other side of the angle steel connector 9 by a single-side bolt 10;

[0085] S202: Anchor the transverse force reinforcement 3 on the box-shaped steel beam 7 with an anchor 8, and weld the steel belt truss web member 4 extending from the composite floor slab to the box-shaped steel beam 7;

[0086] S203, the connection plate 11 is butt-welded to the bulb flat steel top plate 5 and the upper flange of the box-type steel beam 7, and the assembly is completed.

[0087] Finally, you can further proceed as needed:

[0088] S204, installing tuned mass dampers at locations in the composite floor slab that can most effectively reduce vibration.

[0089] The above-mentioned several specific implementation details should not be interpreted as limiting the scope of the present invention. Certain features described in the context of separate embodiments can also be implemented in a single implementation in combination. On the contrary, the various features described in the context of a single implementation can also be implemented in multiple implementations individually or in any suitable sub-combination.

[0090] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A fully assembled steel beam-composite floor system for deep-sea islands and reefs, characterized in that: include: Steel plate bottom plate; The bulb flat steel top plate is made of a plurality of continuously arranged bulb flat steels connected by butt welding; The steel belt truss web member is formed by arranging a plurality of steel belts according to a certain rule to form a truss web member structure, and the top end of the steel belt is welded and fixed to the bulb flat steel top plate, and the bottom end of the steel belt is welded and fixed to the steel plate bottom plate; Longitudinal prestressed tendons are evenly spaced and arranged on the steel plate bottom plate, and are anchored and fixed at both ends of the steel plate bottom plate; The transverse force-bearing bars are evenly spaced and arranged on the longitudinal prestressed bars, and a certain length is reserved at both ends of the transverse force-bearing bars to extend out of the steel plate bottom plate; as well as The steel beam, the bulb flat steel top plate at the transverse edge is butt-welded to the upper flange of the steel beam, the steel belt truss web at the transverse edge is welded to the steel beam, the steel plate bottom plate is bolted to the steel beam, and the transverse force reinforcement passes through the steel beam and is fixed to the steel beam.

2. The fully assembled steel beam-composite floor system according to claim 1, characterized in that: A plurality of continuously arranged bulb flat steels are arranged longitudinally or transversely, and every two bulb flat steels form a group, and the ball heads of the bulb flat steels are adjacently butt-welded and connected.

3. The fully assembled steel beam-composite floor system according to claim 2 is characterized in that: The longitudinal prestressed tendons and the transverse force-bearing tendons are evenly arranged to form a consistent rectangular grid. The plurality of steel strips are grouped in groups of four to form a quadrangular pyramid configuration, wherein a group of two has its top end welded and fixed to a group of spherical flat steel ball heads, and another group of two has its top end welded and fixed to an adjacent group of spherical flat steel ball heads. The bottom ends of the steel strips converge at the intersection of the longitudinal prestressed tendons and the transverse force-bearing tendons, and are welded and connected to the bottom plate of the steel plate. The longitudinal prestressed tendons are located between the two groups of steel strips arranged in the transverse direction, and the transverse force-bearing tendons are located between the two groups of steel strips arranged in the longitudinal direction.

4. The fully assembled steel beam-composite floor system according to claim 3 is characterized in that: The steel strips are symmetrically arranged along the transverse direction with the longitudinal prestressed tendons as the axis, and are continuously arranged along the longitudinal direction at an angle of 60° with the bulb flat steel top plate.

5. The fully assembled steel beam-composite floor system according to claim 1, characterized in that: Anchor plates with through holes are welded at the longitudinal edges of the steel plate bottom plate, and the longitudinal prestressed tendons pass through the through holes and are anchored on the anchor plates with anchors.

6. The fully assembled steel beam-composite floor system according to claim 1, characterized in that: The bulb flat steel top plate is missing a bulb flat steel at the position corresponding to the upper flange of the steel beam, and is butt-welded to the upper flange of the steel beam via a connecting plate.

7. The fully assembled steel beam-composite floor system according to claim 1, characterized in that: One side of the angle steel connector is welded and fixed to the side surface of the steel beam, and the other side is preset with bolt holes. The steel plate bottom plate is overlapped on the other side of the angle steel connector and fixed by bolt connection.

8. The fully assembled steel beam-composite floor system according to claim 1, characterized in that: The steel beam is a box-type steel beam, and a through hole is preset on the web of the box-type steel beam. The transverse force reinforcement passes through the through hole and is anchored on the outer side of the web of the box-type steel beam.

9. The fully assembled steel beam-composite floor system according to claim 1, characterized in that: Steel beam stiffening ribs are welded inside the box of the box-shaped steel beam, and the steel beam stiffening ribs correspond to the positions of the steel plate bottom plate.

10. A construction method of a fully assembled steel beam-composite floor system according to any one of claims 1 to 9, characterized in that: The following steps are involved: S10, factory prefabricated: S101, longitudinal prestressed tendons are arranged on the steel plate bottom plate and connected to the steel plate bottom plate through anchors and prestressed, and then transverse force-bearing tendons are arranged on the longitudinal prestressed tendons; S102, welding one end of the steel strip to the ball head of each bulb flat steel, welding the other end of the steel strip to the steel plate bottom plate, continuing to install adjacent bulb flat steels and steel strips according to this step, and then butt welding the bulb flat steels to form a bulb flat steel top plate; S20, Field Assembly: S201, connect one side of the angle steel connector to the web of the steel beam, then place the composite floor slab on the angle steel connector, pass the transverse force reinforcement through the angle steel connector and the web of the steel beam, and connect the steel plate bottom plate to the other side of the angle steel connector by single-side bolts; S202, anchor the transverse force reinforcement on the steel beam, and weld the steel belt truss web extending from the edge of the composite floor slab to the steel beam; S203, connect the connecting plate to the bulb flat steel top plate and the upper flange of the steel beam by butt welding.

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