Rigid connection joint of double-row steel truss and concrete column head and installation method thereof

Abstract

The present application relates to the field of strip building components, in particular to a rigid connection joint of a double-truss steel truss and a concrete column head and a mounting method thereof. The rigid connection joint of the double-truss steel truss and the concrete column head comprises a stand column (1) and a double-truss (2), characterized in that it further comprises lattice columns (3), fixed steel plates (4) and connecting partitions (5), the bottoms of the four lattice columns (3) are respectively embedded into four corner portions of the top surface of the stand column (1), the tops of the four lattice columns (3) extend out of the top surface of the stand column (1) to the upper chord elevation of the double-truss steel truss (2), and the fixed steel plates (4) with reinforcing ribs are welded between the four lattice columns (3). The mounting method of the rigid connection joint of the double-truss steel truss and the concrete column head is characterized in that the following steps are sequentially implemented: i. column construction; ii. hoisting; iii. rib construction; iv. connection; v. pouring; vi. welding into a structural system. The present application is convenient for construction.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bar-shaped building components, in particular to a rigid connection node of a double-truss steel truss and a concrete column head and a mounting method thereof. BACKGROUND

[0002] Steel structure has the advantages of high bearing capacity, light weight, good seismic performance, etc., and is widely used in large space and large span building structures. Among them, steel truss structure is widely used in large span structure due to its high efficiency of structural force system. Concrete structure has good compression resistance, large section and high stiffness, and is usually used as support column for high space roof. Therefore, the roof structure system composed of concrete column or steel reinforced concrete column and truss structure is a common structure form for large space and large span buildings.

[0003] At present, the current "Code for Design of Composite Structures" (JGJ138-2016) in China only involves four sectional structural forms of steel reinforced concrete columns, which can still meet the column head connection of single-truss truss, but the steel reinforcement needs to be wrapped inside the concrete column, and the longitudinal reinforcement and stirrup outside the steel reinforcement are dense, the construction process is complex, and there is no better method for double-truss truss. SUMMARY

[0004] In order to overcome the defects of the prior art, provide a convenient construction, safe and reliable building connecting device, the present application discloses a rigid connection node of a double-truss steel truss and a concrete column head and a mounting method thereof.

[0005] The present application achieves the purpose of the invention through the following technical solutions:

[0006] A rigid connection node of a double-truss steel truss and a concrete column head, comprising a concrete cast column and a double-truss steel truss made of steel structure, the double-truss steel truss is arranged directly above the column, characterized in that: it further comprises lattice columns, fixed steel plates and connecting partitions,

[0007] The bottoms of the four lattice columns are respectively embedded into the four corners of the top surface of the column by a certain depth, the tops of the four lattice columns extend out of the top surface of the column to the top chord elevation of the double-truss steel truss, the four lattice columns are used as edge constraint members, the fixed steel plates with connecting ribs are welded between the four lattice columns, so that the four lattice columns form an integral member with a box-shaped cross section, the connecting partitions are arranged at the same height as the top chord and the bottom chord of the double-truss steel truss and penetrate the double-truss steel truss, and the connecting partitions are used for welding connection with other steel trusses around, the box-shaped cross sections of the four lattice columns extending out of the top surface of the column can be used as a formwork for concrete pouring, the concrete poured in the interior of the box-shaped cross section can increase the rigidity of the connection node, and the connection part of the column and the double-truss steel truss is located outside the concrete, so that the connection between the column and the double-truss steel truss is convenient and efficient.

[0008] The installation method of the rigid connection joint of the double-frame steel truss and the concrete column head is characterized in that the following steps are sequentially implemented:

[0009] i. Column construction: the concrete column is constructed below the column head pre-buried steel structure module;

[0010] ii. Hoisting: after the four lattice columns and the box-shaped steel member formed by the steel plate between them are pre-assembled into an integral whole in the factory, the integral whole is hoisted to the concrete column head positioning, the height of the lattice column is 1.5 times the entire concrete column section, and the upper end is 250mm higher than the concrete column head, facilitating the upper steel structure joint welding;

[0011] iii. Bar construction: the longitudinal reinforcement and the stirrup in the concrete column head area are installed and constructed, the longitudinal reinforcement is outside the pre-buried steel structure, the stirrup can be directly inserted through the reserved gap of the steel plate, and after the steel bar binding is completed, the concrete is poured;

[0012] iv. Connection: the steel box type structure module above the concrete column head is pre-assembled in the factory, and then hoisted to the concrete column head which has been constructed, and welded and connected with the exposed steel structure at the top of the lower segment; wherein the steel box type module extends to the upper chord height of the double-frame truss by the four corner columns of the pre-buried steel module, the four-edge connected stiffened steel plate is used to close between the lattice columns, the nodes connected with the surrounding double-frame truss on the four-limb lattice column adopt the form of through partition, H-shaped steel is used for welding and connecting at the corresponding node height position, a certain number of studs are arranged inside the steel plate, so that the internal concrete is poured and works together with the steel box type structure module;

[0013] v. Pouring: the upper closed steel box type module is used as a formwork, and the internal concrete is poured to enhance the connection rigidity of the column head joint and realize the rigid connection;

[0014] vi. Welding into a structural system: the double-frame truss is welded with the reserved interface of the upper exposed steel box type module to form a structural system.

[0015] The conversion connection mode of the concrete column head embedded steel bone disclosed in the application can realize the rigid connection of the double-frame steel truss and the concrete column, facilitates construction and installation under the premise of ensuring the load bearing performance, can simplify the construction process, improve the construction safety, and has good popularization and application value. Specifically, the application has the following beneficial effects:

[0016] The application provides great convenience for construction and makes up for the deficiency of the current specification for the connection of the steel-concrete composite structure, the node structure form realizes the conversion of the steel node of the concrete column head, avoids the construction difficulty of the rigid connection of the traditional concrete column and the steel structure, and the conventional connection mode is that the elevation of the concrete column head is flush with the upper chord of the truss, the binding connection of the longitudinal steel bars and the stirrups in the column is difficult, the high-altitude formwork has high risk, and the proposed node form can achieve the same effect as the installation of the steel structure.

[0017] The application solves the conversion connection problem of the double truss steel truss and the concrete column head, breaks through the limitation of the existing specification, ensures the rigid connection of the truss and the concrete column head, and can facilitate the construction installation and improve the economy. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a steel member embedded in the concrete column head in the application,

[0019] Figure 2 is a concrete column structure construction completion state in the application,

[0020] Figure 3 is an upper steel box type module connected with the double truss truss in the application,

[0021] Figure 4 is a front view of the installation of the steel truss and the column head in the application,

[0022] Figure 5 is a perspective view of the installation of the steel truss and the column head in the application. EMBODIMENT

[0023] The application is further illustrated below through specific examples. EXAMPLE

[0024] A rigid connection node of a double truss steel truss and a concrete column head, comprising a concrete-poured stand column and a double truss steel truss made of a steel structure, the double truss steel truss is arranged directly above the stand column, and the node is characterized by further comprising a lattice column, a fixed steel plate and a connecting partition plate,

[0025] The bottoms of the four lattice columns are embedded to a certain depth at the four corners of the top surface of the column. The tops of the four lattice columns extend from the top surface of the column to the upper chord elevation of the double truss. Using these four lattice columns as edge constraint members, a fixed steel plate with stiffening ribs is welded between the four lattice columns to form an integral component with a box-shaped cross-section. Connecting partitions that penetrate the double truss are set at the same height as the upper and lower chords of the double truss on the four lattice columns. The connecting partitions are used to weld and connect other steel trusses around them. The box-shaped cross-section of the four lattice columns extending from the top surface of the column can also serve as a formwork for concrete pouring. The concrete poured inside the box-shaped cross-section can increase the rigidity of the connection node, and the connection between the column and the double truss is located outside the concrete, realizing a convenient and efficient connection between the column and the double truss.

[0026] The installation method for the rigid connection node between the double steel truss and the concrete column head is characterized by the following steps being performed sequentially:

[0027] i. Column construction: Construct the concrete column up to below the pre-embedded steel structure module at the column head;

[0028] ii. Lifting: such as Figure 1 As shown: The box-shaped steel component formed by the four lattice columns and the steel plate strips between them is pre-assembled into a whole in the factory and then hoisted to the concrete column head for positioning. The height of the lattice column is 1.5 times the total concrete column section, and the top end is 250mm higher than the concrete column head to facilitate the welding of the upper steel structure nodes.

[0029] iii. Reinforcement construction: such as Figure 2 As shown: The longitudinal bars and stirrups in the concrete column head area are installed. The longitudinal bars are outside the pre-embedded steel structure, and the stirrups can be inserted directly through the reserved gaps of the steel plate strips. After the steel bars are tied, the concrete is poured.

[0030] iv. Connection: such as Figure 3 As shown: The steel box-type structural modules above the concrete column heads are pre-assembled in the factory and then hoisted to the completed concrete column heads, where they are welded to the exposed steel structure at the top of the lower section. The steel box-type modules use four corner columns of the pre-embedded steel modules at the bottom to extend to the upper chord height of the double trusses. The lattice columns are enclosed by stiffening steel plates connected on four sides. The nodes on the four limb lattice columns that connect to the surrounding double trusses use through-plates. H-beams are welded to the corresponding node heights. A certain number of studs are installed inside the steel plates so that the concrete inside works together with the steel box-type structural modules.

[0031] v. Casting: Using the upper closed steel box-shaped module as a template, concrete is poured into the inside to enhance the connection rigidity of the column head node and achieve a rigid connection;

[0032] vi. Welding into structural system: as shown in Figure 4 and Figure 5 : welding the two trusses with the reserved interfaces of the upper exposed steel box modules to form the structural system.

Claims

1. A rigid connection node between a double steel truss and a concrete column head, comprising a concrete-cast column and a double truss made of steel structure, the double truss being positioned directly above the column, characterized in that: It also includes lattice columns, fixed steel plates, and connecting partitions. The bottom of the four lattice columns is embedded in the four corners of the top surface of the column, and the top of the four lattice columns extends from the top surface of the column to the upper chord elevation of the double truss. Using these four lattice columns as edge constraint members, a fixed steel plate with stiffening ribs is welded between the four lattice columns to form an integral component with a box-shaped cross-section. Connecting partitions that penetrate the double truss are set at the same height as the upper and lower chords of the double truss on the four lattice columns.

2. The installation method of the rigid connection node between the double steel truss and the concrete column head as described in claim 1, characterized in that: Follow these steps in sequence: i. Column construction: Construct the concrete column up to below the pre-embedded steel structure module at the column head; ii. Lifting: After the four lattice columns and the steel plate strips between them are pre-assembled into a whole in the factory, the whole assembly is lifted to the concrete column head for positioning. The height of the lattice column is 1.5 times the total concrete column section, and the top end is 250mm higher than the concrete column head to facilitate the welding of the upper steel structure nodes. iii. Reinforcement construction: Install the longitudinal reinforcement and stirrups in the concrete column head area. The longitudinal reinforcement is outside the pre-embedded steel structure, and the stirrups can be inserted directly through the reserved gaps of the steel plate strips. After the reinforcement is tied, the concrete is poured. iv. Connection: The steel box-type structural modules above the concrete column head are pre-assembled in the factory and then hoisted to the completed concrete column head, where they are welded to the exposed steel structure at the top of the lower section. The steel box-type modules use four corner columns of the pre-embedded steel modules at the bottom to extend to the upper chord height of the double trusses. The lattice columns are closed with stiffening steel plates connected on four sides. The nodes on the four limb lattice columns that connect to the surrounding double trusses use through-plates. H-beams are welded to the corresponding node heights. A certain number of studs are installed inside the steel plates so that the concrete inside works together with the steel box-type structural modules. v. Casting: Using the upper closed steel box-shaped module as a template, concrete is poured into the inside to enhance the connection rigidity of the column head node and achieve a rigid connection; vi. Welding into a structural system: Weld the two trusses to the reserved interfaces of the exposed steel box-type modules at the top to form a structural system.

Images