CN205348386U - Section is cyclic annular large -span steel vestibule structure of piece just - Google Patents

Abstract

The utility model discloses a large-span steel corridor structure whose section is a ring-shaped rigid piece, which is suitable for outdoor large-span corridors and pedestrian bridges. The force transmission of this structural system is clear, and the structural stiffness and natural vibration frequency of the corridor are changed through the rigid connection of the nodes of the annular rigid piece (5), so as to realize the large span of the corridor and meet the design requirements. Its advantage is that the structural system is novel, there is no intersecting diagonal bar between the web bars (4), and the shape is complex and unique. Adjusting the size and thickness of the ring-shaped steel plate (5) can meet different load requirements. In order to meet the long-span and comfortable corridor Performance requirements provide a new type of structural system.

Description

Large-span steel corridor structure with ring-shaped steel section

technical field

The utility model relates to the technical field of design and construction of a large-span fish-bellied steel corridor.

Background technique

In recent years, with the development of engineering technology, the forms of high-rise buildings have become more and more diverse. High-altitude corridors are loved by architects because of their grandeur and modern atmosphere. How to efficiently and accurately analyze and design the structural system of long-span corridors has become an urgent issue to be solved. Looking at the corridors at home and abroad, the corridors with a small span (less than 30 meters) generally adopt a prestressed beam-slab structure or a composite beam-slab structure and the main structure to be integrally cast in place. Structural truss form or tension string structure system. Although the steel truss structure is widely used in long-span corridor structures, the current domestic engineering upper and lower chords and web members all adopt the method of circular tube intersecting welding. The utility model is a steel truss with a ring-shaped steel section Structural system, showing a very unique architectural effect. The engineering background of this utility model is the East Taihu Building in Wujiang District, Suzhou City. ①The span of the steel corridor is large, reaching 56.7m; ②The steel corridor is arc-shaped in plane and space, with a complex and unique shape; ③There is no intersection between the web bars Diagonal bar. In the design of this project, the focus is on ensuring the stiffness of the joints, the reliable force bearing of the support joints, and ensuring that the comfort check calculation meets the requirements of the code, and adopts the measure of passing steel cables inside the lower string steel pipe to prevent falling, which effectively solves the above problems and meets the requirements of the architectural shape. and structural stress requirements.

Utility model content

Technical problem: In order to realize the large span of the steel corridor, reduce redundant structural components, and make the structure light and beautiful, the utility model provides a new structural system with a ring-shaped rigid section, and the rigid connection between nodes increases the steel connection. The rigidity and span of the corridor reduce the vertical deformation of the steel corridor.

Technical scheme: the technical scheme adopted in the utility model is:

A long-span steel corridor structure with a ring-shaped rigid sheet in section, including upper chord longitudinal bars (1) and lower chord longitudinal bars (2), and is characterized in that it also includes upper chord transverse beams (3) and web bars (4) The ring-shaped rigid piece (5) formed by being connected together is formed by encircling the upper chord longitudinal rod (1) and the lower chord longitudinal rod (2) along the cross section to form a rigid connection node.

There are two upper chord longitudinal rods (1) and lower chord longitudinal rods (2).

The distance between the two upper chord longitudinal bars (1) is greater than the distance between the two lower chord longitudinal bars (2).

A plurality of ring-shaped rigid pieces (5) are provided, and are symmetrically distributed along the direction of the upper chord longitudinal bar (1) and the lower chord longitudinal bar (2) from the middle to the supports for fixing the corridor structure at both ends.

Along the direction of the upper chord longitudinal rods (1) and the lower chord longitudinal rods (2), the distance between the two lower chord longitudinal rods (2) becomes larger and larger from the middle to the bearings for fixing the corridor structure at both ends.

The upper chord longitudinal bar (1) and/or the lower chord longitudinal bar (2) adopts round steel pipes.

The upper chord transverse secondary beam (3) and/or the web member (4) adopts I-shaped or box-shaped steel.

Beneficial effect: compared with the prior art, the utility model has the following advantages:

(1) The span of the steel corridor increases;

(2) There is no intersecting diagonal bar between the web bars, and the structure is light and beautiful;

(3) The ultimate load that the steel corridor can withstand increases, which is safe and reliable;

(4) The stiffness of the steel corridor is improved, and the natural frequency is increased to meet the comfort requirements.

The force transmission of this structural system is clear, and the structural stiffness and natural vibration frequency of the corridor are changed through the rigid connection of the nodes of the annular rigid piece, so as to realize the large span of the corridor and meet the design requirements. Different load requirements can be met by adjusting the size and thickness of the ring-shaped rigid sheet, and a new type of structural system is provided to meet the requirements of long-span and comfortable performance of the corridor.

Description of drawings

Fig. 1 is the upper chord plan view of the utility model;

Fig. 2 is the lower chord plan view of the utility model;

Fig. 3 is the elevation view of the utility model;

Fig. 4, Fig. 5 and Fig. 6 are cross-sectional views of the first, seventh, and twelfth ring-shaped steel plates distributed along the direction of the upper chord longitudinal bar and the lower chord longitudinal bar from the middle to the side support direction of the utility model ;

In the figure, the upper chord longitudinal bar 1, the lower chord longitudinal bar 2, the upper chord transverse secondary beam 3, the web bar 4, and the annular rigid sheet 5.

detailed description

The structure of the utility model is shown in Figures 1-6: the large-span steel corridor structure includes two upper chord longitudinal bars 1, two lower chord longitudinal bars 2, upper chord transverse beams 3 and web bars 4, upper chord transverse beams 3 Connect with the web bar 4 to form a ring-shaped rigid piece 5 that surrounds the upper chord longitudinal rod 1 and the lower chord longitudinal rod 2 along the cross section, and makes the distance between the two upper chord longitudinal rods 1 larger than the distance between the two lower chord longitudinal rods 2 distance, so that the ring-shaped rigid sheet 5 is an approximately inverted triangle shape as a whole. A plurality of ring-shaped rigid plates 5 are provided, distributed symmetrically from the middle to the supports for fixing the corridor structure along the direction of the upper chord longitudinal bar 1 and the lower chord longitudinal bar 2, and surrounding the upper chord longitudinal bar 1 and the lower chord longitudinal bar at intervals 2, and make the distance between the lower chord longitudinal bars 2 larger and larger.

The rigid connection between the nodes formed by the above connection ensures the out-of-plane stability of each annular rigid piece 5 and improves the integrity of the fish-bellied steel corridor; During the design, the floor deck only acts as a load guide, without considering its membrane stiffness and bending stiffness; when designing the floor deck, the floor is input as shell elements, and its membrane stiffness and bending stiffness are considered. Control the vertical deformation and natural frequency of the long-span steel corridor.

The upper chord longitudinal bar 1 and the lower chord longitudinal bar 2 are made of round steel pipes, and the upper chord transverse beam 3 and the web bar 4 are made of I-shaped or box-shaped steel. The remarkable difference between the utility model and other engineering structures is that the upper chord longitudinal bar 1 and the lower chord longitudinal bar 2 are surrounded by the annular rigid piece 5 formed by the upper chord transverse secondary beam 3 and the web bar 4 . For the problem of poor vertical deformation of the upper chord plane, different arching requirements are put forward for the inner and outer upper chord longitudinal bars 1 during construction to ensure that the floor does not have a sense of outward inversion under normal use. If the span and bearing capacity requirements of the steel corridor are high, the measure of passing steel cables inside the lower chord longitudinal rod 2 can be adopted to prevent falling.

Claims (7)

1. a section is the large-span steel gallery structure of ring-type tablet, including the longitudinal rod that winds up (1) and lower edge longitudinal rod (2), it is characterized in that, also include winding up horizontal secondary beam (3) and web member (4) connects together the ring-type tablet (5) formed, ring-type tablet (5) will wind up longitudinal rod (1) and lower edge longitudinal rod (2) forms rigid joint along cross section is surrounded.

2. section according to claim 1 is the large-span steel gallery structure of ring-type tablet, it is characterized in that, the longitudinal rod that winds up (1) and lower edge longitudinal rod (2) are two.

3. section according to claim 2 is the large-span steel gallery structure of ring-type tablet, it is characterized in that, the distance between two longitudinal rods that wind up (1) is more than the distance between two lower edge longitudinal rods (2).

4. section according to claim 1 is the large-span steel gallery structure of ring-type tablet, it is characterized in that, ring-type tablet (5) arranges multiple, and it is symmetrical that trend being used for from the middle to both ends along wind up longitudinal rod (1) and lower edge longitudinal rod (2) fixes the bearing of gallery structure.

5. the section according to Claims 2 or 3 is the large-span steel gallery structure of ring-type tablet, it is characterized in that, along wind up longitudinal rod (1) and lower edge longitudinal rod (2) trend from the middle to both ends be used for fixing the bearing direction of gallery structure, the distance between two lower edge longitudinal rods (2) is increasing.

6. section according to claim 1 is the large-span steel gallery structure of ring-type tablet, it is characterized in that, the longitudinal rod that winds up (1) is or/and lower edge longitudinal rod (2) adopts round steel pipe.

7. section according to claim 1 is the large-span steel gallery structure of ring-type tablet, it is characterized in that, the horizontal secondary beam (3) that winds up is or/and web member (4) adopts the steel of I shape or box-type section.