Novel anti-seismic steel frame structure system and construction method thereof

Abstract

The present application relates to the technical field of building engineering, and particularly to a novel anti-seismic steel frame structure system and a construction method thereof. The novel anti-seismic steel frame structure system comprises a steel frame main body, a plurality of top frame columns, a top frame beam, and a plurality of composite cables. The top frame columns are distributed at intervals and vertically arranged on the top surface of the steel frame main body, and one end of each top frame column is hingedly connected to the steel frame main body. The top frame beam is in a net structure and arranged on the top of the top frame columns, and the top frame beam is hingedly connected to the top of the top frame columns. The top surface of the top frame beam is provided with a roof. Two composite cables are connected between every two adjacent top frame columns. The beneficial effects of the novel anti-seismic steel frame structure system are as follows: the top frame columns are hingedly connected to the top of the steel frame main body, the top frame beam is hingedly connected to the top of the top frame columns, and the composite cables are connected between the adjacent top frame columns. The top frame columns and the top frame beam can swing with the steel frame main body, thereby serving as a damper to absorb the lateral force when the steel frame main body swings, and thus achieving the effect of resisting earthquakes.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and specifically to a novel earthquake-resistant steel frame structure system and its construction method. Background Technology

[0002] A tuned mass damper (TMD), also known as a tuned mass shock absorber, is a mechanical device that absorbs the vibration energy of the main structure through a mass-spring-damping system. It is mainly used for seismic and wind-induced vibration control of large structures such as high-rise buildings and bridges. However, tuned mass dampers often have a large mass, which can impose a huge additional load on the main structure of the building. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a new type of earthquake-resistant steel frame structure system and its construction method, which solves the problem that the installation of tuned mass dampers in existing earthquake-resistant buildings will bring huge additional loads.

[0004] The technical solution to achieve the above objectives is:

[0005] This invention provides a novel earthquake-resistant steel frame structure system, comprising:

[0006] Steel frame main body;

[0007] Several top-level frame columns are spaced apart and vertically arranged on the top surface of the main steel frame, with one end hinged to the main steel frame.

[0008] The top-level frame beam has a mesh structure and is located at the top of the top-level frame column. The top-level frame beam is hinged to the top of the top-level frame column, and the top surface of the top-level frame beam is provided with a roof.

[0009] Several composite cables are used, with two composite cables connecting each pair of adjacent top-level frame columns.

[0010] Furthermore, two composite cables are intersected between two adjacent top-level frame columns, with one end connected to the top of one top-level frame column and the other end connected to the bottom of the other top-level frame column.

[0011] Furthermore, the composite cable includes:

[0012] Two anchoring steel plates are set opposite to each other on the corresponding top-level frame columns;

[0013] Two cables are placed between two anchor plates, with both ends passing through the corresponding anchor plates;

[0014] Four anchor bolts are fixed to the ends of the corresponding cables.

[0015] Furthermore, the two cables include a stiff cable and a flexible cable, wherein the flexible cable is in a taut state with prestress applied inside, and the stiff cable is in a slack state.

[0016] Furthermore, the stiffness of the rigid cable is greater than that of the flexible cable.

[0017] This invention also provides a construction method for a novel earthquake-resistant steel frame structure system, specifically including the following steps:

[0018] Erect the main steel frame structure at the designed location;

[0019] One end of the top-level frame column is hinged to the main body of the steel frame;

[0020] Keep the top-level frame column vertical, then hoist the top-level frame beam to the top of the top-level frame column, and hinge the top of the top-level frame column to the top-level frame beam;

[0021] Two composite cables are connected between every two adjacent top-level frame columns.

[0022] Furthermore, the composite cable includes: two opposing anchor steel plates, two cables connected between the two anchor steel plates, and four anchor bolts fixed to the corresponding cable ends;

[0023] The steps for connecting the composite cable between two top-level frame columns are as follows: fix two anchor plates to the corresponding top-level frame columns respectively, place the two cables between the two anchor plates, pass the ends of the two cables through the corresponding top-level frame columns, and then fix the anchor bolts to the ends of the cables.

[0024] Furthermore, the two cables include a stiff cable and a flexible cable. When installing the flexible cable, prestress is applied to the flexible cable to keep it taut, while when installing the stiff cable, the stiff cable is kept slack.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] By hinged top-level frame columns at the top of the main steel frame structure, hinged top-level frame beams at the top of the top-level frame columns, and then connecting composite cables between adjacent top-level frame columns, the structure can sway with the main steel pipe frame, thus acting as a damper to absorb the lateral forces during the swaying of the main steel frame structure, thereby achieving the effect of earthquake resistance.

[0027] By setting the composite cable as two types of cables with different stiffnesses, the flexible cable with lower stiffness is kept taut, while the stiffer cable with higher stiffness is kept slack. Under normal conditions, the flexible cable is subjected to tension to accommodate the slight swaying of the steel frame. Under extreme conditions such as earthquakes, when the swaying of the steel frame exceeds the slack of the stiffer cable, the stiffer cable is subjected to tension, increasing the stiffness of the composite cable and thus meeting the requirement of tensioning the top-floor frame columns. Attached Figure Description

[0028] Figure 1 This is a side view of the overall structure of a novel earthquake-resistant steel frame structure system according to the present invention.

[0029] Figure 2 This is a schematic diagram of a composite cable structure of a novel earthquake-resistant steel frame structure system according to the present invention.

[0030] Legend: 1. Steel frame main body; 2. Top-level frame beam; 3. Top-level frame column; 4. Composite cable; 41. Stiff cable; 42. Flexible cable; 43. Anchoring steel plate; 44. Anchor bolt. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] See Figure 1 This invention provides a novel earthquake-resistant steel frame structure system and its construction method, solving the problem of huge additional loads caused by installing tuned mass dampers in existing earthquake-resistant buildings. By modifying the top floor of the building structure into a swingable floor, it primarily bears the vertical load of the upper floors while simultaneously functioning as a tuned mass damper, thus forming the novel earthquake-resistant steel frame structure system proposed in this invention.

[0033] The following description, in conjunction with the accompanying drawings, illustrates a novel earthquake-resistant steel frame structure system and its construction method according to the present invention.

[0034] See Figure 1 This image shows an overall structural side view of a novel earthquake-resistant steel frame structural system according to the present invention. (See also...) Figure 2 The diagram shows a schematic of a composite cable structure in a novel earthquake-resistant steel frame structural system according to the present invention. The following is in conjunction with... Figure 1 and Figure 2 This invention describes a novel earthquake-resistant steel frame structure system and its construction method.

[0035] like Figure 1 and Figure 2 As shown, a novel earthquake-resistant steel frame structure system of the present invention includes:

[0036] Steel frame main body 1;

[0037] Several top-level frame columns 3 are spaced apart and vertically arranged on the top surface of the steel frame body 1, with one end hinged to the steel frame body 1.

[0038] The top frame beam 2 has a mesh structure and is located at the top of the top frame column 3. The top frame beam 2 is hinged to the top of the top frame column 3, and the top surface of the top frame beam 2 is provided with a roof.

[0039] Several composite cables 4, with two composite cables 4 connecting each two adjacent top-level frame columns 3.

[0040] In one specific embodiment, two composite cables 4 are arranged crosswise between two adjacent top-level frame columns 3, with one end connected to the top of one of the top-level frame columns 3 and the other end connected to the bottom of the other top-level frame column 3.

[0041] In one specific embodiment, the composite cable 4 includes:

[0042] Two anchoring steel plates 43 are set on the corresponding top-level frame columns 3 respectively;

[0043] Two cables are placed between two anchoring steel plates 43, and both ends pass through the corresponding anchoring steel plates 43;

[0044] Four anchor bolts 44 are fixed to the ends of the corresponding cables.

[0045] In one specific embodiment, the two cables include a stiffening cable 41 and a flexible cable 42, wherein the flexible cable 42 is in a taut state with internal prestress, and the stiffening cable 41 is in a slack state. The flexible cable 42 is initially subjected to tension to ensure the stability of the top frame column 3. When the amplitude of the top frame column 3 exceeds the slack of the stiffening cable 41, the stiffening cable 41 begins to be subjected to tension. Under the combined action of the flexible cable 42 and the stiffening cable 41, the overall stiffness of the composite cable 4 is increased, thereby providing greater tension and ensuring the stability of the top frame column 3.

[0046] In one specific embodiment, the stiffness of the rigid cable 41 is greater than the stiffness of the flexible cable 42.

[0047] The composite cable 4 has the following stress characteristics:

[0048] 1) During normal operation or when the main body of the steel frame 1 sways slightly, only the flexible cable 42 is under tension, while the stiff cable 41 in the relaxed state is not under tension. The overall axial tensile stiffness of the composite cable 4 in this stage is the same as the axial tensile stiffness of the flexible cable 42.

[0049] 2) When the swaying of the main steel frame 1 becomes excessive, until the overall tensile deformation of the composite cable 4 reaches the relaxation amount of the stiffening cable 41 (i.e., the stiffening cable 41 changes from a relaxed state to a taut state), the stiffening cable 41 begins to bear force. At this stage, the overall axial tensile stiffness of the composite cable 4 is the sum of the axial tensile stiffness of the flexible cable 42 and the axial tensile stiffness of the stiffening cable 41. Since the stiffness of the stiffening cable 41 is greater than the stiffness of the flexible cable 42, the axial tensile stiffness of the composite cable 4 at this stage will increase.

[0050] 3) The flexible cable 42 and the stiff cable 41 undergo elastic deformation when under tension.

[0051] Specifically, the top of the top frame beam 2 is equipped with a roof, on which equipment such as wind turbine boxes and central air conditioning units can be installed. The top frame column 1 can bear the loads of the top frame beam 2, the roof, and various equipment.

[0052] This invention also provides a construction method for a novel earthquake-resistant steel frame structure system, specifically including the following steps:

[0053] Erect the main steel frame 1 at the designed location;

[0054] One end of the top frame column 3 is hinged to the steel frame body 1;

[0055] Keep the top frame column 3 vertical, then hoist the top frame beam 2 to the top of the top frame column 3, and hinge the top of the top frame column 3 to the top frame beam 2;

[0056] Two composite cables 4 are connected between every two adjacent top frame columns 3.

[0057] In one specific embodiment, the composite cable 4 includes: two anchoring steel plates 43 arranged opposite to each other, two cables connected between the two anchoring steel plates 43, and four anchor bolts 44 fixed to the corresponding cable ends;

[0058] The steps for connecting the composite cable 4 between the two top-level frame columns 3 are as follows: fix the two anchor steel plates 43 to the corresponding top-level frame columns 3 respectively, place the two cables between the two anchor steel plates 43, pass the ends of the two cables through the corresponding top-level frame columns 3, and then fix the anchor bolts 44 to the ends of the cables.

[0059] In one specific embodiment, the two cables include a stiff cable 41 and a flexible cable 42. When installing the flexible cable 42, a prestress is applied to the flexible cable 42 to keep it taut. When installing the stiff cable 41, the stiff cable 41 is kept slack.

[0060] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A novel earthquake-resistant steel frame structure system, characterized in that: include: Steel frame main body (1); Several top-level frame columns (3) are spaced apart and vertically arranged on the top surface of the steel frame body (1), with one end hinged to the steel frame body (1); The top frame beam (2) has a mesh structure and is located at the top of the top frame column (3). The top frame beam (2) is hinged to the top of the top frame column (3). The top surface of the top frame beam (2) is provided with a roof. Several composite cables (4), with two composite cables (4) connecting each two adjacent top frame columns (3); Two composite cables (4) are intersected between two adjacent top-level frame columns (3), with one end connected to the top of one of the top-level frame columns (3) and the other end connected to the bottom of the other top-level frame column (3). The composite cable (4) includes: two anchoring steel plates (43) arranged opposite to each other, respectively set on the corresponding top frame column (3); two cables, set between the two anchoring steel plates (43), with both ends passing through the corresponding anchoring steel plates (43); and four anchor bolts (44), respectively fixed to the ends of the corresponding cables. The two cables include a stiff cable (41) and a flexible cable (42), wherein the flexible cable (42) is in a taut state and has prestress applied inside, while the stiff cable (41) is in a slack state.

2. The novel earthquake-resistant steel frame structure system according to claim 1, characterized in that: The stiffness of the rigid cable (41) is greater than that of the flexible cable (42).

3. A construction method for a novel earthquake-resistant steel frame structure system according to claim 1, characterized in that: Specifically, the steps include the following: Erect the main steel frame at the designed location (1); And one end of the top frame column (3) is hinged to the steel frame body (1); Keep the top frame column (3) vertical, then hoist the top frame beam (2) to the top of the top frame column (3), and hinge the top of the top frame column (3) to the top frame beam (2); Two composite cables (4) are connected between each pair of adjacent top frame columns (3).

4. The construction method of the novel earthquake-resistant steel frame structure system according to claim 3, characterized in that: The composite cable (4) includes: two anchoring steel plates (43) arranged opposite to each other, two cables connected between the two anchoring steel plates (43), and four anchor bolts (44) fixed to the corresponding cable ends. The steps for connecting the composite cable (4) between the two top frame columns (3) are as follows: fix the two anchor plates (43) to the corresponding top frame columns (3) respectively, place the two cables between the two anchor plates (43), pass the ends of the two cables through the corresponding top frame columns (3), and then fix the anchor bolts (44) to the ends of the cables.

5. The construction method of the novel earthquake-resistant steel frame structure system according to claim 4, characterized in that: The two cables include a stiff cable (41) and a flexible cable (42). When the flexible cable (42) is installed, a prestress is applied to the flexible cable (42) to keep it taut. When the stiff cable (41) is installed, the stiff cable (41) is kept slack.

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