Bohai Steel Structure Co., Ltd.

Bohai Steel Structure Co., Ltd.
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    phone: 18812088818

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    ADD: Longhua Development Zone, Jing County, Hengshui City, Hebei Province

    The fabrication process and processing technology of steel structure are introduced in detail.

    author:Bohai Steel Structure Co., Ltd.

    【Font size: big medium smail

    time:2019-10-01 13:37:15

    According to the requirement of internal effective space and the structure condition of the servo device itself, the structure can only adopt a high-rise system without horizontal support. On the main body of the structure, a fast driving device and a detector are suspended under the servo device. In order to ensure the rigidity of the fast servo device and the detector in the course of moving, six roots are applied at the lower part. Prestressed wire rope is controlled in a relatively stable range by a specific control mechanism. The spoon load of the first level horizontal drive system is 90_, the longitudinal moving load of the second level horizontal follow-up system is 42_, the lateral moving load is 60 T, and the two coordinates of the fast horizontal follow-up system are 2.5T and 4T. The pulling force of a single wire rope in the ground driving system is 3T. Besides meeting the national standards and standards, the whole main structure should have strong knotting reliability. When explosion occurs with an experimental propellant (TN explosive equivalent of 4.5kg), the main body of the tower structure must be able to ensure its integrity and safety, and can be further improved after corresponding maintenance and maintenance. According to the requirements of the test site, the main structure adopts steel-bonded space rigid frame. For the high-rise tower structure, this type of structure has the advantages of clearing the load, small wind resistance coefficient, strong overall stability and elegant appearance.

    In this scheme, two outrigger-legged portal space steel trusses are used to support two truss girders (net main span_om) of the truck and the oblique planar support of the portal steel truss. The truss connection is used at the end of the truss girders of the two trucks. The main control dimensions are as follows: 1) The span of the outrigger portal steel truss is 26 m at the upper part, 70 m at the lower part (22 m at each side), and the top elevation is 98 m; the cross-section of the outrigger leg is 6 m x 6 m, and the cross-section of the upper steel truss is 6 m x 4 M. 2) Two crane truss beams with variable cross-section of 6m *5m~6m *10m are connected with portal steel truss on the outside. The top elevation of crane truss beams is 90m, and the cross-section of sealed steel truss at both ends is 5m *5m. 3) The plane oblique support section of portal steel frame is 6mx5m. The spatial schematic and plane position maps are shown in Fig. 3 and Fig. 4, respectively. Intention [Large-span high-rise test frame structure block diagram 4 test site map (plane Figure 2.2 load analysis, working condition combination and preliminary static and dynamic analysis results tentatively choose_235-C steel as the main material, to use seamless steel pipe, because the wind resistance coefficient of H-section steel is slightly larger than that of circular steel pipe, the appearance is also more beautiful, the conditions are: seismic fortification intensity: basic ground: design: Seismic acceleration value is 0.20g; design earthquake grouping: group 1; basic wind pressure: 0.45kN/m2; site category (category III).

    2) Load analysis: Constant load: including structural truss weight, crane-level follow-up system, the same below) self-weight, lamp and hanger weight, inspection model, maintenance load, dynamic load, etc.); wind load; earthquake load; local explosion impact load and other 3) load combination: load combination according to "Code for Load of Building Structures"; The results of DL+crane(including follow-up)+horizontal DL+crane(including follow-up)+vertical force DL+crane+seismic load(including wind load group DL+crane+wind load L+crane+explosive load(including impact overpressure analysis and fragment-free impact analysis) are shown in Fig. 5.

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