Supporting steel structure for curved exterior curtain wall with spring device suspender and its construction method

Abstract

The invention provides a curve-surface outer curtain wall support steel structure with hanger rods with spring devices. A plurality of horizontal steel pipe trusses are arranged on a main body structure in a hinged mode, the hanger rods with the springs are divided into two sets to be arranged along the outer edges and the inner edges of the horizontal steel pipe trusses respectively, the upper ends of the hanger rods are elastically and fixedly hung to a roof structure in the main body structure, the lower ends of the hanger rods are fixedly hinged to a concrete structure of the main body structure, the hanger rods are divided into upper sections and lower sections at the positions where the horizontal steel pipe trusses are arranged, and the disconnected ends of the two sections are fixedly hinged to the upper side faces and the lower side faces of the horizontal steel pipe trusses respectively. According to the support steel structure, a roof system and a curtain wall system are communicated with each other, the overall curtain wall system is fixed through the hanger rods with the springs and the horizontal steel pipe trusses and without cross beams, and therefore the adverse influences generated on the roof structure and the curtain wall system due to wind load and live load changes are better eliminated. The invention further provides an installation construction method of the support steel structure.

Description

technical field [0001] The invention belongs to the technical field of building curtain wall structures, and relates to a steel structure support system for a curved outer curtain wall of a public building in a large space, and in particular provides a supporting steel structure for a curved outer curtain wall with a spring device suspender and a construction method thereof. Background technique [0002] The curved outer curtain wall structure of a public building with a large space requires greater permeability. At the same time, as a landmark building in the city, its shape also has its own uniqueness. In the existing large-space public buildings, the curved outer curtain wall and the main structure are mostly connected by space steel truss system, cable net structure system, tie rod steel structure system, strut steel structure system, etc. [0003] There are some drawbacks in the prior art: [0004] 1. The section structure of the space steel truss system is adopted, an...

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Problems solved by technology

[0004] 1. The section structure of the space steel truss system is adopted, and the horizontal span is large. In order to control the size of the components, the sagittal height of the truss, that is, the vertical distance from the top of the arc to the straight line connecting the two ends, is relatively large, which affects the permeability of the curtain wall

However, the use of thinner cross-section rods such as cable net curtain walls will have a larger prestress, which will have a more adverse impact on the main structure.

[0005] 2. When the building curtain wall is a curved glass curtain wall, if the space steel truss system is still used to realize it, there will be more defects and difficulties

For example, the space steel truss needs to be made into an overall broken-line splicing or stretch-bending form. Its processing and assembly need to maintain high precision. At the same time, because the component cross-section is too thick, it cannot effectively and concisely simulate the support system of the curved curtain wall.

If the cable net curtain wall is used, the design and construction will be more difficult, and the requirements for the main structure will also increase

[0006] 3. Some projects take into account wind load, live load, temperature, earthquake and specific engineering conditions. For example, the large cantilever roof will produce vertical displacement under the action of wind load. If the suspender of the suspender steel structure support system is directly suspended On the roof structure, the vertical displacement of the roof structure makes the suspenders loose, resulting in a large vertical deflection of the steel structure support system under the weight of the curtain wall, and the curtain wall system fixed on the steel structure support system cannot adapt to the vertical displacement change. Sealing performance and safety issues

Due to the large span between the columns of the adjacent main structure, the steel truss set on the top requires a lot of steel content and the cost is relatively high

When the curtain wall system is far away from the main structural column, it is more difficult to arrange the steel truss on the top to fix the suspenders, and more steel content is required, so it is not as convenient as directly fixing it on the roof structure

[0007] 4. The outer protective curtain wall of a public building with a large space is generally high. Considering the stability of the strut under pressure, the cross-section is made relatively thick, which will affect the transparent visual effect and also affect the application of the strut steel structure system

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