CN109930747A - A kind of cast-in-place package Honeycomb Beam for the welded type holes in soffit that misplaces - Google Patents

Abstract

The invention discloses a kind of cast-in-place package Honeycomb Beams of welded type holes in soffit that misplaces comprising the steel skeleton being made of girder and secondary beam；Wherein, girder and secondary beam are made of I-beam, which includes web and the top flange and lower flange for being separately positioned on its web or more two sides；Default broken line cutting of the I-beam on its web is divided into two a sides along toothed girder steel, and the toothed side dislocation welding of two girder steels forms the girder or secondary beam of web strips hole；After the completion of steel prefabricated skeleton, longitudinal reinforcement and pipeline are arranged wherein；Wherein, lower part longitudinal reinforcement and pipeline both pass through the hole on web, and top longitudinal reinforcement passes through from the top of top flange, are arranging longitudinal reinforcement and pipeline after-pouring concrete, steel skeleton is wrapped up with concrete, so that steel skeleton and reinforced concrete floor form integral module.Honeycomb Beam cross sectional moment of inertia of the invention and anti-bending bearing capacity are big, and have good energy dissipation capacity under seismic loading.

Description

A cast-in-place wrapped honeycomb beam with dislocation welded web openings

technical field

The invention relates to the technical field of building components, in particular to a cast-in-place wrapped honeycomb beam with a dislocation welded web opening.

Background technique

The area of newly built houses in urban and rural areas in my country is 2 billion cubic meters every year, of which more than 80% are buildings with high energy consumption. The energy consumption per unit building area in my country is more than twice that of developed countries. According to the statistics of China Iron and Steel Association, my country's steel output reached 800 million tons in 2016, ranking first in the world since 2000. Correspondingly, the current domestic construction industrialization degree is less than 10%, while the steel structure construction area of developed countries accounts for the total construction area. More than 50%, Japan accounted for 80%. As the country with the largest construction scale and the largest steel output in the world, China's development of building steel structures is seriously lagging behind.

Nowadays, the composite beam floor slabs used in buildings in China mostly adopt the traditional cast-in-place construction method. The steel beams located under the floor slabs are of solid web type, and the amount of steel used is large, resulting in limited beam height. The problem of instability, and the steel beam is easy to rust, not resistant to high temperature, anti-corrosion, fire prevention and other issues are particularly important; the steel beam and the floor need to be connected to each other with studs, which consumes manpower and material resources; the composite beam wrapped in concrete, due to the distance between the upper flange of the steel beam and the formwork It is relatively close, resulting in a very small entrance for conveying concrete and inconvenient construction; the pipelines used in the building are mostly below the beams and slabs, which reduces the building headroom and occupies indoor use space; in the case of earthquakes and other loads, the floor at the support is the control section. Under the negative bending moment, the reinforced concrete is in tension and is prone to damage; in addition, the beam-slab section is T-shaped, the beam height is the sum of the steel beam height h0 and the floor thickness L, and the steel beam net height h0 cannot be expressed as the beam height, Expressions are very confusing.

SUMMARY OF THE INVENTION

In view of the problems existing in the above-mentioned prior art, the present invention provides a cast-in-place wrapped honeycomb beam with a dislocation welded web opening. Root secondary beams; the four main beams are combined into a rectangular frame, the secondary beams are fixed in the rectangular frame, and are arranged in parallel with the main beams on the short side of the rectangular frame to form a steel frame;

Wherein, the main beam and the secondary beam are both made of I-beam, and the I-beam includes a web and upper and lower flanges respectively arranged on the upper and lower sides of the web; the I-beam is along the The preset broken line on the web is cut into two steel beams with teeth on one side, and the two steel beams with teeth on one side are dislocated and welded to form the main beam or the secondary beam with holes in the web;

After the steel frame is prefabricated, longitudinal reinforcement bars and pipelines are arranged therein, and the longitudinal reinforcement bars include upper longitudinal reinforcement bars and lower longitudinal reinforcement bars; wherein, the lower longitudinal reinforcement bars and the pipelines pass through the main beam and the secondary longitudinal reinforcement. The hole on the beam, the upper longitudinal steel bar passes through the upper part of the upper flange of the main beam and the secondary beam, pours concrete after arranging the longitudinal steel bar and the pipeline, and wraps the steel frame with concrete, Thus, the steel frame and the reinforced concrete floor slab form an integral module.

Further, the upper parts of the main beam and the secondary beam are located inside the reinforced concrete floor slab.

Further, the upper flange of the I-beam includes two trapezoidal plates; wherein, the two trapezoidal plates are respectively arranged at both ends of the upper side of the I-beam.

Further, the width of the upper flange of the I-beam is smaller than the width of the lower flange of the I-beam.

Optionally, the holes on the main beam and the secondary beam are hexagonal.

Optionally, the holes on the main beam and the secondary beam are rectangular.

Optionally, the main beam and the main beam, and between the main beam and the secondary beam, are connected and fixed by welding.

The cast-in-place wrapped honeycomb beam with dislocation welding type web opening provided by the present invention has the following beneficial effects:

The dislocation welding type cast-in-place wrapped honeycomb beam with web opening provided by the present invention cuts the steel beam web along the broken line, and then dislocation welding forms the steel beam with the web opening, so that the material is fully utilized, and the steel beam is not increased. Under the premise, the beam height is increased, the moment of inertia of the section is increased, and the flexural bearing capacity is also increased;

At the same time, a plurality of hexagonal or rectangular holes are formed in the web of the steel beam, so that the pipelines (water, heating, electric pipes, etc.) used in the building can pass through the holes of the web of the steel beam, abandoning the tradition of routing pipelines in the ceiling In this way, the pipelines are not exposed, the interior is neat and beautiful, and the interior height of the room is increased, thereby increasing the usable space;

According to the negative bending moment of the steel beam near the support position, the shape of the upper flange of the steel beam is changed to a trapezoid, and there is no upper flange in the middle of the steel beam, or the upper flange of the steel beam is narrowed, so as to save steel and reduce the cost of the steel beam. In the case of large repeated loads such as earthquake action, the upper flange yields, but because it is located in the reinforced concrete floor, it will not cause instability and has good energy dissipation capacity. The lower flange is wider and does not have plasticity. Instability phenomenon, will not make the wrapped concrete fall off;

After the construction is completed, the steel beam is completely wrapped in concrete, which improves the local stability of the components and has good anti-corrosion and fire-proof effects;

The traditional composite beam floor beam section is calculated according to the T shape, and the beam height is the sum of the steel beam height h0 and the floor thickness L. The difference is that the cast-in-place wrapped honeycomb beam of the present invention is a beam-slab integral module, and the beam height is The net height h0 of steel beams is relatively clear; in addition, in the traditional composite beam floor slab, the floor slab is located at the upper part of the T-shaped section, and the steel beam is located under the floor slab. The upper part of the steel beam of the cast-in-place wrapped honeycomb beam of the present invention is located inside the floor slab. On the one hand, the beam-slab bolt connection and concrete pouring are omitted, and the construction efficiency is improved; on the other hand, the neutral axis of the steel beam bearing the bending moment is moved upward, The tensile section area of the floor slab is reduced, and the structural safety performance is improved.

Description of drawings

Fig. 1 and Fig. 2 are the steel beam web manufacturing flow chart of the present invention that opens hexagonal hole;

Fig. 3 is a flow chart of the present invention for making a steel beam web with a rectangular hole

4 is a schematic diagram of a steel beam with a hexagonal hole in the web of the present invention;

5 is a schematic diagram of a steel beam with rectangular holes in the web of the present invention;

Fig. 6 is the steel frame schematic diagram of the cast-in-place wrapped honeycomb beam of the present invention;

Fig. 7 is the sectional exploded view of the cast-in-place wrapped honeycomb beam of the present invention;

Fig. 8 is the sectional view after the pouring of the cast-in-place wrapped honeycomb beam of the present invention is completed;

9 is a schematic diagram of a steel beam with a narrow upper flange and a hexagonal hole in the web of the present invention;

10 is a schematic diagram of a steel beam with a narrow upper flange and a rectangular hole in the web of the present invention;

11 is a schematic diagram of a steel beam with a trapezoidal upper flange and a hexagonal hole in the web of the present invention;

12 is a schematic diagram of a steel beam with a trapezoidal upper flange and a rectangular hole in the web of the present invention;

13 is a schematic view of the steel skeleton of the cast-in-place wrapped honeycomb beam of the weakened upper flange of the present invention;

14 is an exploded sectional view of the cast-in-place wrapped honeycomb beam of the weakened upper flange of the present invention;

Fig. 15 is a sectional view of the cast-in-place wrapped honeycomb beam of the weakened upper flange of the present invention after pouring.

Description of reference numbers:

1: Web, 2: Top Flange, 3: Bottom Flange, 4: Hole, 5: Primary Beam, 6: Secondary Beam,

7: Steel frame, 8: Concrete.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIG. 1 to FIG. 15 , the present embodiment provides a cast-in-place wrapped honeycomb beam with a dislocation welded web opening. The dislocation welded cast-in-place wrapped honeycomb beam with a web opening includes four main beams 5 and The root beam 6; the four main beams 5 are combined into a rectangular frame, and the secondary beam 6 is fixed in the rectangular frame and is arranged in parallel with the main beam 5 on the short side of the rectangular frame to form a steel frame 7, as shown in Figures 6 and 6 13 shown. Among them, the main beams 5 and between the main beam 5 and the secondary beam 6 are all connected and fixed by welding.

Among them, the main beam 5 and the secondary beam 6 are both made of I-beams, and the I-beam includes a web 1 and an upper flange 2 and a lower flange 3 respectively arranged on the upper and lower sides of the web 1; The preset broken line on the web 1 is cut into two steel beams with teeth on one side, and the two steel beams with teeth are dislocated and welded to form the main beam 5 or the secondary beam 6 with holes 4 in the web, so as to fully Using materials, without adding steel, the height of the web 1 is increased, and a plurality of holes 4 are formed on it, thereby increasing the beam height, thereby increasing the moment of inertia of the section, and increasing the flexural bearing capacity.

After the steel frame 7 is prefabricated, longitudinal reinforcement bars and pipelines (water, heating, electric pipes, etc.) are arranged in it, and the longitudinal reinforcement bars include upper longitudinal reinforcement bars and lower longitudinal reinforcement bars; wherein, the lower longitudinal reinforcement bars and pipelines pass through the main beam 5. And the hole 4 on the secondary beam 6, so as to hide inside the floor slab, increase the clear height inside the room, and achieve the effect of neat and beautiful interior. The upper longitudinal steel bars pass through the upper parts of the upper flanges of the main beam 5 and the secondary beam 6. After the longitudinal steel bars and pipelines are arranged, concrete 8 is poured, and the steel frame 7 is wrapped with the concrete 8, so that the steel frame 7 is connected with the reinforced concrete. The floor slab forms an integral module;

The upper part of the above-mentioned main beam 5 and secondary beam 6 is located inside the reinforced concrete floor, as shown in Figure 7, Figure 8, Figure 14 and Figure 15; in this way, not only can the beam-plate stud connection be omitted, it is convenient for concrete pouring, and the construction is improved. In addition, when the floor is under load, the neutral axis of the steel beam bearing the bending moment is moved upward, the negative bending moment of the floor at the support is reduced, the tensile section area is reduced, and the structural safety performance is improved. In addition, since the steel frame 7 is completely enclosed by the concrete 8, the local stability of the component is improved, and it has good anti-corrosion and fire-proof effects. In addition, since the upper flange 2 of the steel beam is located on the upper surface of the floor slab, the beam height is the net height h0 of the steel beam, and the expression is clear.

Further, according to the size of the negative bending moment that the steel beam near the support position bears, in the present embodiment, the upper flange 2 of the above-mentioned I-beam is set to two trapezoidal plates; the two trapezoidal plates are respectively arranged on the I-beam. The two ends of the side and the middle part are not provided with flanges, as shown in Figure 11 and Figure 12; or the upper flange 2 is narrowed, so that the width of the upper flange 2 of the I-beam is smaller than the width of the lower flange 3 ; as shown in Figure 9 and Figure 10. In this way, steel is saved. In the case of repeated loads such as earthquakes, the upper flange 2 yields. However, because it is in the reinforced concrete floor, it will not cause instability and has good energy dissipation capacity. 3 It is wider, and plastic instability does not occur, and the wrapped concrete will not fall off.

Optionally, the holes 4 on the main beam 5 and the secondary beam 6 may be hexagonal, as shown in FIGS. 4 , 9 and 11 ; or rectangular, as shown in FIGS. 5 , 10 and 12 . Since the hexagonal or rectangular hole 4 has a larger hole diameter, the advantage of the round hole is that it is more convenient for pipelines and steel bars to pass therethrough.

The assembly method of the cast-in-place wrapped honeycomb beam with the dislocation welded web opening of the present embodiment is as follows:

In the factory, the web 1 is cut along the fold line, and then welded at a dislocation, so that the web 1 is increased, and a plurality of hexagonal or rectangular holes 4 are formed; the main beam 5 is placed around as a frame, and the secondary beam 6 in the middle is parallel to the short The side main beams are placed, and the joints between the steel beams are fixed by welding; the steel frame 7 prefabricated in the factory is transported to the construction site, placed in the supported formwork by hoisting, and then the pipelines and steel bars inside the floor are arranged , and finally pour concrete 8.

In addition, it should be noted that, in this embodiment, the terms "comprising", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or terminal device including a series of elements not only Include those elements, but also include other elements not expressly listed or inherent to such process, method, article or terminal equipment. Without further limitation, an element defined by the phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, article or terminal device comprising said element.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. a cast-in-place wrapped honeycomb beam with dislocation welding type web opening, is characterized in that, comprises four main beams and a secondary beam; Described four main beams are combined into rectangular frame, and described secondary beam is fixed on In the rectangular frame, the main beam on the short side of the rectangular frame is arranged in parallel to form a steel frame; Wherein, the main beam and the secondary beam are both made of I-beam, and the I-beam includes a web and upper and lower flanges respectively arranged on the upper and lower sides of the web; the I-beam is along the The preset broken line on the web is cut into two steel beams with teeth on one side, and the two steel beams with teeth on one side are dislocated and welded to form the main beam or the secondary beam with holes in the web; After the steel frame is prefabricated, longitudinal reinforcement bars and pipelines are arranged therein, and the longitudinal reinforcement bars include upper longitudinal reinforcement bars and lower longitudinal reinforcement bars; wherein, the lower longitudinal reinforcement bars and the pipelines pass through the main beam and the secondary longitudinal reinforcement. The hole on the beam, the upper longitudinal steel bar passes through the upper part of the upper flange of the main beam and the secondary beam, pours concrete after arranging the longitudinal steel bar and the pipeline, and wraps the steel frame with concrete, Thus, the steel frame and the reinforced concrete floor slab form an integral module. 2 . The cast-in-place wrapped honeycomb beam with web openings by dislocation welding according to claim 1 , wherein the upper parts of the main beam and the secondary beam are located inside the reinforced concrete floor slab. 3 . 3 . The cast-in-place wrapped honeycomb beam with a dislocation welded web opening according to claim 1 , wherein the upper flange of the I-beam comprises two trapezoidal plates; wherein, the two trapezoidal plates They are respectively arranged at both ends of the upper side of the I-beam. 4. The cast-in-place wrapped honeycomb beam with dislocation welded web openings according to claim 1, wherein the width of the upper flange of the I-beam is smaller than the width of the lower flange of the I-beam . 5 . The cast-in-place wrapped honeycomb beam with a dislocation welded web opening according to claim 1 , wherein the holes on the main beam and the secondary beam are hexagonal. 6 . 6 . The cast-in-place wrapped honeycomb beam with dislocation welded web openings according to claim 1 , wherein the holes on the main beam and the secondary beam are rectangular. 7 . 7. The cast-in-place wrapped honeycomb beam with dislocation welded web openings according to claim 1, characterized in that, between the main beam and the main beam, and between the main beam and the secondary beam are connected and fixed by welding.