CN112127473A - Novel assembly type steel frame structure and mounting method thereof - Google Patents

Abstract

The invention discloses a novel assembly type steel frame structure and an installation method thereof. The side frame columns are formed by connecting two hot-rolled H-shaped steels through high-strength bolts, and the middle frame column is formed by connecting three hot-rolled H-shaped steels through high-strength bolts. Taking a middle frame post as an example, the cross-shaped cross-section of the post of the structural system is formed by H-shaped steel with a larger cross-section in one main shaft direction and two H-shaped steel with a smaller cross-section in the other main shaft direction. The flange of the H-shaped steel with the smaller section is connected with the web of the H-shaped steel with the larger section through the high-strength bolt to form the combined cross-shaped section frame column. The frame column is used as a vertical bearing component, so that the stability of the frame column is greatly improved, and the stress requirement is met better. In addition, the flanges and the webs of the columns are spliced through the cover plates and the bolts, and the joints of the beams and the columns are also provided with end plate bolt joints, so that the traditional complex welding process is avoided, and the detachable function is realized.

Description

Novel assembly type steel frame structure and mounting method thereof

Technical Field

The invention relates to the field of assembled steel structures in civil engineering, in particular to a low-rise frame structure system which is more convenient to install and disassemble, the core of the low-rise frame structure system is that 2-3H-shaped steels are combined into a frame column through high-strength bolts, and the structure system is located in coastal areas and can resist 14-level typhoons with experience calculation.

Background

Since the 21 st century, the fabricated structures have been used in large quantities due to the advantages of convenient construction, high recycling rate and the like, and China also advocates that the fabricated structures account for about 30% of the total building structure in 2020. In the traditional steel frame structure system, most of various nodes are all welded or partially welded and partially bolted, so that the construction progress is slowed to a certain extent. In order to meet special process requirements, the end part of a house wall sheet is provided with an H-shaped column, 2-3H-shaped steels are connected through bolts at the intersection of the wall sheets to form a frame column as a core to carry out structural design, and the cross section of the house wall sheet is more stable than that of the house wall sheet in the traditional cross section. In the structure type, the design is a full-assembly type structure, the splicing nodes are connected by the cover plates and the bolts, the construction speed can be accelerated compared with the traditional process, the disassembly is convenient, the repeated utilization rate is high, and certain reference can be provided for the design and the structure of the assembly type steel structure in future. In addition, in terms of structural safety, it is empirically calculated that: the structural system can resist typhoon of up to 14 grades and can provide certain reference for frequent typhoon areas.

The existing modular steel structure houses are generally provided with square-through or special-shaped column sections (such as Sunwei, Kingliwei, Wang Yueyuan. lower-layer modular house structural performance analysis [ J ]. steel structure (Chinese and English), 2019,34(07):65-69, Wudawn, Yanyuan, Wudayong, Yantao, Xuxin. Container assembly building damping structure and connection node anti-seismic performance analysis research [ J ]. steel structure, 2019,34(04):1-8+ 73.); in addition, the corrugated steel plate is used as a building envelope, which is not the precast concrete wall piece of the project.

Disclosure of Invention

The side frame posts of the assembled steel frame structure system are T-shaped sections formed by connecting two hot-rolled H-shaped steels through bolts, and the middle frame post is a cross-shaped section formed by connecting three hot-rolled H-shaped steels through bolts. In the aspect of node construction, the splicing nodes of the upper-layer column and the lower-layer column are connected by adopting cover plate bolts, so that the welding process is more time-efficient than the original welding process; the joints of the steel beams and the steel columns are connected through end plate bolts, and the steel beams and the flanges of the steel columns are all rigidly connected, so that the problem of complex structure of rigid connection between the steel beams and the webs is solved.

The technical scheme of the invention is as follows.

A novel assembly type steel frame structure is characterized in that the assembly type steel frame is more than one of a combined cross-shaped section column or a combined T-shaped section column; the frame columns at the sides are T-shaped in cross section, and the frame columns at the middle are cross-shaped in cross section; the combined cross-shaped section column consists of three H-shaped steels; the combined T-shaped section column is composed of two H-shaped steel.

Furthermore, the combined cross-shaped section column is provided with a large-section H-shaped steel along the depth direction of the room, and two small-section H-shaped steels along the room opening direction; the flanges of the two small-section H-shaped steels are connected with the web of the large-section H-shaped steel through bolts to form a combined cross-shaped section together.

Furthermore, the combined T-shaped section column is provided with a large-section H-shaped steel along the depth direction of the room, and a small-section H-shaped steel along the room opening direction; the flange of the small-section H-shaped steel is connected with the web of the large-section H-shaped steel through a bolt to jointly form a combined T-shaped section.

Furthermore, the splicing joints of the wing edge webs of the upper column and the lower column are connected by adopting cover plate bolts, and the splicing joints of three or two H-shaped steels are staggered along the height direction of the columns, so that the safety of the columns is ensured.

Furthermore, each room module is formed by connecting four prefabricated wall bodies through 4 combined section columns, H-shaped steel members are arranged at the end parts of the wall bodies, and the H-shaped steel at the intersection of the wall bodies forms the combined section column of the steel frame.

Furthermore, the hidden columns are arranged in the prefabricated wall pieces at the middle parts and the four-point parts of the beams, so that the support of the beams is increased, the cross sections of the beams are reduced, and the safety of the wall pieces is ensured.

Furthermore, all the nodes are connected through bolts, and after the components are machined in a factory, the nodes are convenient to install on site and easy to detach.

A mounting method of an assembly type steel frame structure is characterized by comprising the following steps:

(1) fixing four prefabricated walls of each room;

(2) constructing a combined section column at the intersection of the prefabricated wall pieces through high-strength bolts;

(3) the connection between the floor beam and the combined section column is completed through the end plate bolt;

(4) installing a floor slab to finish a second floor of the structural system;

(5) the construction method of other layer columns is similar to that of the floor (roof) beam;

(6) installing a roof panel to complete the structural system;

when the section of the column is selected, selecting a common hot-rolled H-shaped steel column as a vertical stress component for the column at the end part of the corridor cantilever beam; selecting a combined section column as a vertical stressed member at the intersection of the wall sheets; in this case, the frame posts at the sides are preferably T-shaped in cross section, and the frame posts at the middle are preferably cross-shaped in cross section; the combined section column is more than one of a combined cross section column or a combined T-shaped section column.

The invention has the following advantages and effects:

(1) the combined cross-shaped (T) section column consists of three (two) H-shaped steel. Taking an intermediate frame column as an example, the cross-shaped section of the column of the structural system is a cross-shaped section, one H-shaped steel Z1 is arranged in the plane direction of the frame, and two H-shaped steels Z2 and Z3 with small sections are arranged in the direction vertical to the plane direction of the frame. Wherein, the flanges of Z2 and Z3 are connected with the web of Z1 through bolts to form a combined cross-shaped section. All the connections between the combined sections are bolted connections without welding seams, so that the construction speed is greatly increased, and the construction quality is improved. Similarly, the frame columns at the sides have T-shaped cross sections, and the connection structure of the frame columns is the same as that of the frame columns at the middle.

(2) The upper and lower layer post concatenation node adopts apron bolted connection, and the edge of a wing web piece of three (two) H shaped steel is connected along the crisscross disconnection of post height direction, and the H shaped steel web of upper column adopts concatenation apron and bolt and the H shaped steel web of lower column, and the H shaped steel edge of a wing of upper column adopts concatenation apron and bolt to be connected with the H shaped steel edge of a wing of lower column simultaneously, and the bolt is taken 100 ~ 150mm along the direction of height interval to this security of post is ensured to the structure.

(3) The nodes of the beams and the columns are connected by end plate bolts. For the steel beam with the section height less than 150mm, the upper part of an end plate of the steel beam is flush, the lower part of the end plate extends outwards, the end plate of the beam is connected with a column by adopting 3 rows of bolts, 2 rows of the end plate are positioned in the height plane of the steel beam, and 1 row of the end plate is positioned outside the height plane of the steel beam; and for the steel beam with the section height larger than 150mm, the upper part and the lower part of the end plate are flush, and the number of the bolts is determined according to the section height.

(4) At the middle part of the beam and the four-point part, the wall sheet is internally provided with the hidden columns, so that the rigidity of the wall sheet is increased, the anti-cracking capacity of the wall sheet is improved, the hidden columns can also be used as the beam along the vertical support, the internal force of each section of the beam tends to be uniform, the material is fully utilized, the deflection and the section size of the beam are greatly reduced, and the safety of the beam and the wall sheet is ensured by the structure.

(5) The structure avoids field welding, and after components are processed in a factory, the structure is convenient to install on site and easy to disassemble.

Drawings

FIG. 1 is a positioning diagram of the structural architecture frame posts;

FIG. 2 is a structural floor plan of the architecture;

FIG. 3 is a cross-sectional view of a side T-shaped frame post (GZ 01);

fig. 4 is a sectional view of a middle truss-shaped frame post (GZ 02);

FIG. 5 is a detailed view of a splicing node structure of T-shaped frame columns with side frames;

FIG. 6 is a cross-sectional view of 1-1 of FIG. 5;

FIG. 7 is a cross-sectional view of 2-2 of FIG. 5;

FIG. 8 is a cross-sectional view taken along line 3-3 of FIG. 5;

FIG. 9 is a detailed view of a splicing node structure of middle truss-shaped frame columns;

FIG. 10 is a cross-sectional view of 1-1 of FIG. 9;

FIG. 11 is a cross-sectional view of 2-2 of FIG. 9;

FIG. 12 is a cross-sectional view of section 3-3 of FIG. 9;

fig. 13 is a cross-sectional view of 4-4 in fig. 9.

Fig. 14 is a room arrangement diagram of the architecture.

Detailed Description

The present invention will be described in further detail with reference to the following examples and the accompanying drawings.

Example 1

Fig. 1 and 2 respectively show a column positioning diagram and a structural plane layout diagram of the structural system, and as shown in the figure, six rigid frames are arranged in the structural system along the digital axis direction. Wherein, to corridor cantilever beam tip post, C axle frame post adopts traditional ordinary hot rolling H shaped steel promptly, no longer gives unnecessary details to it. In addition, the frame columns with 1 axis and 6 axes crossing the A axis to the B axis are T-shaped sections, the frame columns with 2-5 axes crossing the A axis to the B axis are cross-shaped sections, and the structure and the connection method of the frame columns are completely the same except for the section shapes and properties of the frame columns. Therefore, when the column section is selected in the actual engineering, for the column at the end part of the corridor cantilever beam, a common hot-rolled H-shaped steel column is selected as a vertical stress component; at the intersection of the wall panels, a composite section column may be selected as the vertical force-bearing member. In this case, it is preferable that the frame posts of the side frames have a T-shaped cross section and the frame posts of the middle frame have a cross-shaped cross section. The combined section column has the following advantages as a vertical stress component: the combined section column combines the advantages of H-shaped steel and box section columns, can meet the principle of two-axis equal-strength stress, and all nodes are connected through bolts, so that the construction speed is greatly accelerated, and the combined section column is more green and environment-friendly. In addition, the combined cross section is used as a vertical bearing component, so that the stress requirement is better met, and the stability of the steel frame column is greatly improved.

Example 2

Fig. 3 and 4 show detailed cross-sectional views of the frame posts of the side frames and the frame posts of the middle frame, and table 1 shows a material table of the cross-section of the frame post of the structural system. As can be seen from the graph, the horizontal direction of the frame columns is one hot-rolled H-section steel Z2 of HN 175X 90X 5X 8, and the vertical direction is one hot-rolled H-section steel Z1 of HN 250X 125X 6X 9. The middle frame post is horizontally two HN 175X 90X 5X 8 hot-rolled H-shaped steels Z2 and Z3, and vertically one HN 250X 125X 6X 9 hot-rolled H-shaped steel Z1. Taking the middle frame post as an example, the cross-sectional height of Z1 is 250mm, and the flange widths of Z2 and Z3 are 90mm, so the distance between the cross-sectional edges of Z2 and Z1 is 80mm in the vertical direction in the figure. Therefore, in the actual section selection process, the height of the section Z1 is preferably about 3 times of the flange width of Z2 and Z3. Similarly, the cross-sectional width of Z1 is 125mm, and the cross-sectional heights of Z2 and Z3 are 175mm, so the distance between the cross-sectional edges of Z2 and Z1 is 116mm in the horizontal direction shown in the figure. Therefore, in the actual section selection process, the height of the sections Z2 and Z3 is preferably about 1.5 times the width of the section Z1.

Table 1 shows a material table of the frame column of the structural system

Example 3

Fig. 5 to 13 show the structural details of the side frame nodes and the middle frame nodes of the structural system, and table 2 shows the material table of the beam section of the structural system. As shown in fig. 5 and 9, the H-shaped steels with T-shaped cross sections are connected to each other by 2M18@300 bolts to form frame columns with side (middle) trusses.

Table 2 shows the material table of the frame beam of the structural system

The combination of the two sectional views 1-1 can be seen from FIGS. 6 and 10:

(1) the structure system is a 2-layer assembled steel frame structure, splicing nodes of upper and lower layers of columns of a combined T (cross) section column are connected by adopting cover plate bolts, H-shaped steel Z1 is disconnected between 2-3 rows of bolts in the direction from top to bottom, and H-shaped steel Z2 and Z3 are disconnected between 2-3 rows of bolts in the direction from bottom to top. The number of the bolts is 10 rows and 2 columns, the diameter of the bolt is 18mm, and the diameter of the bolt hole is 20 mm; in the vertical direction, the distance between the bolts is 100-150 mm; in the horizontal direction, the bolt middle distance is 38mm, and the edge distance is 76 mm; the cover plate is 10mm in thickness, 1410mm in length and 190mm in width. Therefore, in practical engineering, the vertical distance between the bolts is preferably 100-150 mm, the thickness of the cover plate is preferably more than or equal to that of the web plate, and an even number is preferably selected; in addition, the joints of the three H-shaped steels need to be ensured to be staggered along the height direction of the column, so that the safety of the combined section column is ensured.

(2) Two ends of the frame column are respectively and rigidly connected with steel beams with the cross sections of HW100 multiplied by 100(GL3) and HN200 multiplied by 100(GKL1), and the joints of the steel beams are connected by end plate bolts. For GL3, because of the small height of the section, the upper part of the end plate is flush, the lower part of the end plate extends outwards, the number of rows of bolts is 3, 2 rows of bolts are positioned in the height plane of the steel beam, the pitch of the bolts is 40mm, the edge distance is 30mm, 1 row of bolts is positioned outside the height plane of the steel beam, and the distance from the outer skin of the steel beam is 50 mm; for GKL1, the height of the cross section of the GKL1 is slightly larger than that of GL3, so that the upper and lower parts of the end plates of the GKL1 are flush, the rows of bolts are 3 and are all positioned in the height plane of a steel beam, the pitch of the bolts is 55mm, and the edge pitch is 45 mm.

The 3-3 sectional view combining the two is shown in fig. 8 and 12: the frame column is rigidly connected with a steel beam with HN175 x 90(GKL2) section, the joints of the steel beam and the GKL2 are connected by end plate bolts, the upper and lower parts of the end plates are flush, the number of the rows of the bolts is 3, the bolts are all positioned in the height plane of the steel beam, the bolt pitch is 45mm, and the edge pitch is 43 mm. Therefore, in practical engineering, for a steel beam with a section height less than 150mm, the upper part of the end plate of the steel beam is preferably flush, the lower part of the end plate of the steel beam extends outwards, the end plate of the beam is preferably connected with the column by adopting 3 rows of bolts, 2 rows of the end plate are positioned in the height plane of the steel beam, and 1 row of the end plate is positioned outside the height plane of the steel beam; for the steel beam with the section height larger than 150mm, the upper part and the lower part of the end plate are preferably flush, and the number of the bolts is determined according to the section height.

In addition, the sectional view 2-2 and the sectional view 4-4 of the two are better illustrated as the sectional view 1-1 and the sectional view 3-3, and are not repeated herein.

Example 4

Fig. 14 shows a room module layout diagram of the architecture. As shown in fig. 14, the structural system is composed of 3 room modules, and each room is formed by connecting four prefabricated walls through 4 combined section columns. Wherein, the T-shaped combined section column GZ01 is connected with wall plates Q3 and Q1(Q2) between the AB span and the 1-2 shafts; the cross-shaped combined section column GZ02 is connected with wall plates Q4 and Q1(Q2) between the AB span and the 1-2 shafts, and the room FJ1 is formed by the four prefabricated wall plates and 4 combined section columns. The room FJ2 has the same structure as the room FJ1 except that 4 corner columns are cross-shaped combined cross-section columns GZ02, and thus the description is omitted. Besides, the structure system is also provided with hidden columns AZ in the middle and the four-point points of the beam and in the wall sheets under the beam. The method can improve the crack resistance of the prefabricated wall sheet, reduce the thickness of the prefabricated wall sheet, and enable the embedded column to be used as a support of the beam along the vertical direction, so that the internal force of each section of the beam tends to be uniform, the material is fully utilized, and meanwhile, the deflection of the beam is greatly reduced, thereby ensuring the safety of the beam and the wall sheet.

Claims (8)

1. A novel assembly type steel frame structure is characterized in that the assembly type steel frame is more than one of a combined cross-shaped section column or a combined T-shaped section column; the frame columns at the sides are T-shaped in cross section, and the frame columns at the middle are cross-shaped in cross section; the combined cross-shaped section column consists of three H-shaped steels; the combined T-shaped section column is composed of two H-shaped steel.

2. The novel assembled steel frame structure of claim 1, wherein the combined cross-shaped section column is provided with one large-section H-shaped steel along the depth direction of a room and two small-section H-shaped steels along the opening direction; the flanges of the two small-section H-shaped steels are connected with the web of the large-section H-shaped steel through bolts to form a combined cross-shaped section together.

3. The novel assembled steel frame structure of claim 1, wherein the combined T-shaped section column is formed by arranging a large section H-shaped steel along the depth direction of a room and a small section H-shaped steel along the bay direction; the flange of the small-section H-shaped steel is connected with the web of the large-section H-shaped steel through a bolt to jointly form a combined T-shaped section.

4. The novel assembled steel frame structure of claim 1, wherein the splicing joints of the flanges and the webs of the upper and lower columns are connected by adopting cover plates and bolts, and the splicing joints of three or two H-shaped steels are staggered along the height direction of the columns, so that the safety of the columns is ensured.

5. A novel assembled steel frame structure as claimed in claim 1, wherein each room module is formed by connecting four prefabricated wall bodies through 4 sectional composite columns, H-shaped steel members are provided at the ends of the wall bodies, and the H-shaped steel at the intersections of the wall bodies forms the sectional composite columns of the steel frame.

6. A novel assembled steel frame structure as claimed in claim 1, wherein the built-in columns are provided in the prefabricated wall panel at the central and quarter points of the girder, thereby increasing the support of the girder and reducing the section of the girder, and ensuring the safety of the wall panel.

7. The novel assembled steel frame structure of claim 1, wherein all the nodes are connected by bolts, and the assembled steel frame structure is convenient to install on site and easy to disassemble after components are processed in a factory.

8. The method for installing the fabricated steel frame structure according to claims 1 to 7, comprising the steps of: (1) fixing four prefabricated walls of each room;

(2) constructing a combined section column at the intersection of the prefabricated wall pieces through high-strength bolts;

(3) the connection between the floor beam and the combined section column is completed through the end plate bolt;

(4) installing a floor slab to finish a second floor of the structural system;

(5) the construction method of other storey columns is similar to that of the floor beam;

(6) installing a roof panel to complete the structural system;

when the section of the column is selected, selecting a common hot-rolled H-shaped steel column as a vertical stress component for the column at the end part of the corridor cantilever beam; selecting a combined section column as a vertical stressed member at the intersection of the wall sheets; in this case, the frame posts at the sides are preferably T-shaped in cross section, and the frame posts at the middle are preferably cross-shaped in cross section; the combined section column is more than one of a combined cross section column or a combined T-shaped section column.

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