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What kind of structure system does multilayer steel structure building project have? In contrast to single-story steel structures, wind loads (and seismic loads) on multi-story steel structures become more and more important as the height of the building increases. Therefore, how to bear the horizontal force effectively is an important problem to consider the structure composition of the multi-storey steel structure building. Under the action of the wind, there should be not only enough carrying capacity, but also enough stiffness, so that the top several floors do not have too much sway, giving people an uncomfortable feeling. The composition of the multi-storey steel structure house has the following main systems: (1) rigid frame structure The multi-layer multi-span rigid frame is composed of beam and column to bear the horizontal load. Under the action of horizontal load, this structure not only has the overall lateral displacement of the cantilever beam, but also has the displacement caused by the interlayer shear force, so the deformation is relatively large. It can be used for no more than 20-30 floors. A rigid connection shall be made between the beam and the column. When the number of layers does not exceed 10-15, semi-rigid connections may also be considered. (2) structure with support A vertical cantilever truss is formed by setting an inclined brace between two columns. The capacity of bearing horizontal load is higher than that of the rigid frame structure. This structure is suitable for 20-45 floors and allows for flexible, semi-rigid or rigid connections between beams and columns. (3) cylindrical structure The steel structure houses with more than 60 floors adopt the tubular structure which is more economical. All the four sides around the houses are composed of frames, forming a space truss system with large rigidity. This structure has been used effectively for the towering 110-story houses. Canister structure can also be set up without diagonal support, and in the four sides around the columns are arranged more closely, forming a space rigid frame type cylinder body. It can be up to 80 stories high. The inner tube of the cylindrical structure can also be made by using the elevator shaft, which can bear the horizontal force together with the outer tube, while the other columns in the middle can only bear the vertical load. (4) suspension structure This system USES the inner tube located in the center of the building to bear all gravity and horizontal load. There are overhanging trusses on the top of the barrel, and the floor plates are hung on the analysis rack with high-strength steel pull rods. After the completion of the inner tube can be used to lift the steel structure, the whole project period is shorter.
2019-03-08
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Steel structure company tell you what are the technical requirements for steel structure installation? Steel structure is composed of steel material structure, is one of the main building structure types. The structure is mainly composed of steel beams, steel columns, steel trusses and other components made of section steel and steel plates. Due to its light weight and simple construction, northeast steel structure production and installation company is widely used in large factories, stadiums, super high-rise buildings and other fields. 1. Before the installation of the steel structure, all kinds of records and reports such as the factory qualification certificate of the components, material experiment report and non-destructive inspection side report of the welding seams should be checked. The appearance of the components should be checked to see if they meet the design requirements. 2. Draw the installation flow chart of the steel structure and install according to the flow chart. Before installation, check the embedded accuracy of all anchor bolts, and correct them in time when the spatial position and the design drawing are found out, so as to ensure the accuracy of anchor bolts. 3. The installation sequence of components should be carefully designed to form a rigid body as soon as possible, so as to continue the installation and maintain a stable state, and to facilitate the elimination of errors in the installation of steel structures 4. Necessary checking calculation should be carried out for the lifting of components, and measures should be taken to prevent distortion and damage of components with small lateral stiffness. 5. During the installation of columns or steel structures, beams and supports should be installed in a timely manner, and cables and wind ropes should be added for temporary fixation when necessary. 6. The installation of the steel column should pay attention to control the influence of temperature difference on the perpendicularity of the component. The side quantity should be adjusted according to the perpendicularity of the standard column determined first, and the other columns should be reviewed. 7. When the column is installed, the positioning axis of each column must be directly led up from the control axis of the ground, and the axis of the top of the next column shall not be used as the positioning axis of the last column 8. The welding environment at the installation site of steel structure, the welding position and the operation at the height, and the adverse influence of air temperature and humidity on the cables are very easy to produce weld defects, so it is necessary to take corresponding measures to overcome the influence of these adverse factors. The unqualified weld shall not be reworked or repaired more than twice. 9. Torque wrenches used for high-strength bolts must be calibrated and calibrated before use, and should be calibrated after use. Once it is found that the calibration torque error exceeds the allowable range, the screw bolts applied to such wrenches are unqualified. The high strength bolt should be inspected after the final twist, and the nut can be knocked one by one with a small hammer. Torque should also be tested at random 10. After the installation of the steel structure is completed and the correction is correct, the gap between the bottom plate of the column and the top surface of the foundation shall be grouting again in time to make the bottom plate and the top surface of the foundation contact with the top 11. The entire steel structure shall be checked and accepted according to the "code for acceptance of construction quality of steel structure engineering" (GB 50205-2001) after installation.
2019-03-08
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What are the characteristics of light steel structure compared with the design of ordinary steel structure? The load-bearing structure of light steel structure building is generally cold-formed thin wall steel, pressed steel plate, pressed aluminum plate, hot rolled h-beam, t-beam, etc., so what are its characteristics compared with the ordinary steel structure? Compared with the design of ordinary steel structure, the design of light steel structure has the following characteristics: (l) compression and stability shall be calculated according to the effective section. (2) the design strength of cold bending effect can be considered when calculating the strength of all effective tensile and love-in members of all sections. (3) the cold-formed thin-walled steel structure must adopt effective anti-corrosion measures according to the design specifications.
2019-03-08
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Considerable prospect of steel structure engineering Because now use the advantages of steel structure, steel structure engineering in our country at present has been engaged in development, general steel structure engineering economic performance has been the subject of attention, how to control the steel structure engineering cost, give full play to the excellent performance and advantages of steel structure engineering, is a critical stage in the development of steel structure engineering. Steel structure engineering development in our country already has a long history, at the time of natural disasters, steel structure building play an irreplaceable role, highlighted the advantages of steel structure engineering is also very good, but the steel structure has the characteristics of high cost compared with traditional buildings, the steel structure industry would do well to balance the conflict between economic performance and operational performance, to make the steel structure project has a strong vitality, steel structure building for modern people's life, is no longer cold building, but a warm and comfortable home, bearing the weight of the joys and sorrows of life in a building, It brings a sense of security to people who live in the fast pace of modern life. The government strongly encourages the development of steel structure engineering, although the cost of steel structure engineering will be higher than traditional housing, but the construction period is short, fast, can save a lot of labor, we are not difficult to see, the future development of steel structure engineering road must be considerable. Shenyang jianwei steel structure engineering co., ltd. is a comprehensive large-scale construction steel structure enterprise, which includes the general contracting of construction projects; Professional steel structure design, manufacturing, installation and corresponding decoration decoration, with the ministry of construction issued by the national steel structure installation of grade a qualification, steel structure special design grade a qualification and China steel structure association issued by the production of grade a qualification. The company was founded in 1999, the registered capital of the company is 15 million yuan. The total assets of the company are RMB 280 million and the annual output value is RMB 300 million. The company is a sino-foreign joint venture, and its shareholders are shenyang jianwei industrial co., LTD and China (Hong Kong) construction steel structure engineering co., LTD. Company now employees nearly 780 people, of which nearly 140 people, managers and senior management personnel above 46 people, master degree or above in 4 people, 3 senior accountants, senior engineer 4 people, professor engineer 1 person, 1 doctoral student, 1st class registered structural division 2, 1 1st class registered architect, registered cost division 1, 17 associate constructor, college degree or above 100%. Especially in the field has 3 d3s STeel structure design, X - STeel, and other international well-known software, is in the domestic first-class level in the figure, design, technical support and other American VP company technical support to make the company in terms of light STeel in the STeel quantity and optimization design in the international leading position, at the same time the company has nearly 30 project managers at all levels, multiple projects get the national award.
2019-03-08
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