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How do China, the United States and Europe account for accidental eccentricity in seismic design?

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  Regulations and Methods for Considering Accidental Eccentricity Effects in Seismic Design in China, the United States and Europe 1. Regulatory Basis ● China The Code for Seismic Design of Buildings (GB 50011-2010) stipulates that accidental eccentricity must account for uncertainties in structural mass distribution, stiffness distribution, and spatial variations in seismic motion. Torsional effects shall be calculated using either static or dynamic methods. ● United States ASCE 7-22 (American Society of Civil Engineers Standard) requires consideration of accidental torsional effects, typically calculated using static methods, with verification through dynamic analysis results. ● Europe Eurocode 8 (EN 1998-1:2004) simulates the misalignment between mass centres and stiffness centres by introducing accidental eccentricity, and mandates consideration of the effects of bidirectional seismic actions . 2. Definition and Values of Random Eccentricity ● China Eccentricity: ±5% of the ...
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What is the size of the grid size depends on?

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  Grid size depends on the choice of roofing materials,  if the roofing system without purlins, that is, the use of wire mesh cement board or reinforced concrete roof panels, grid size should not exceed 4m, otherwise the roof panels will be very heavy; If the purlin system is used, the grid size should not exceed 6m due to the economic span of purlins. ———————————————————————— If you want to build fast, choose steel construction! If you want steel buildings, contact us! Whatsapp/Tel:+ 86/13056229023 E-mail:safs121@safsteelstructure.com
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What are the characteristics of the space frame structure

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The space frame is a mesh structure composed of many steel bar. It is a high -end super -static space structure. The space frame structure can be divided into two types: flat space frame and curved space frame. The flat space frame is used more. The advantages are: space stress system, the pole parts are mainly axial force, reasonable force, good overall performance, large rigidity, and good shock resistance. There are fewer rod types, suitable for industrial production. Space frame can be divided into two types: cross truss system and corner cone system. The corner cone system is more reasonable and greater. The height and short -span of the space frame is generally about 1/15. Steel tubes are generally used, and nodes generally use ball nodes. —————————————— We have many space frame structure projects.  If you have similar projects, please feel free to contact us. 👇👇👇 Whatsapp/Tel:+ 86/13056229023 E-mail:safs121@safsteelstructure.com Website:www.safsteelstructure.com/
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What is the difference between blanking plant and cone ?

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The blanking plant  and the cone of the space frame  mainly play the role of connecting the steel pipe and the bolt, and bear the tension and pressure from the rod. When the diameter of the steel pipe of the rod is ≥  76mm, the conical head connection should be used; when the diameter of the steel pipe of the rod < 76mm, the blanking plate connection can be used. Join us and learn about steel construction together! ———————————————— Whatsapp/Tel:+ 86/13056229023 E-mail:safs121@safsteelstructure.com
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How many quality control points need to be implemented for the safety control of the space frame structure?

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  1 、 The material must meet the design requirements. 2 、 The design of the spherical space frame must conform to the corresponding specification standards. 3 、 The quality control of assembling process. 4 、 The one-way axial tensile and compressive bearing capacity test of the ball node is as strong as the parent material requirements. 5 、 Bolt ball node for the thread of the largest bolt hole of the finished ball for tensile strength test. 6 、 The installation of the space frame should be the first control construction and installation program to have a practical grasp. 7 、 The reference axis and the elevation of the top of the column must conform to the design and standards. 8, focus on controlling the deflection value of the   space   frame under self-weight and load, the average deflection value of the measurement point shall not be greater than 1,15 times the design value. __________________________________ Whatsapp/Tel:+ 86/13056229023 E-mail:safs121@safsteelstruct...
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What is the classification of the steel structure industry?

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 What is the classification of the steel structure industry? According to the current usual classification, the steel structure industry includes high-rise steel structure, light steel structure, space frame  structure , residential steel structure, bridge steel structure, and steel structure for public facilities. space frame Space steel structure mainly refers to the mesh frame and its combined structure and hybrid structure. It is a kind of space structure system with reasonable force, high stiffness, light weight, single rod and convenient production and installation.
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What is the truss welding method?

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  truss roof Most of the rods in joist structures are welded at the nodes. Before welding, the webs and chords need to be cut in advance according to the shape of the weld seam of each member to be welded, which requires cutting of the web ends and slotting of the chords. Since the joist structure is intersected by coherent line between the rods and rods, the shape of rod end section is complicated, so in the actual cutting process, two methods of mechanical automatic cutting process and manual cutting process are generally used.
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What is a truss?

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truss roof A truss refers to a lattice structure composed of round rods connected to each other at the ends. Wide range of applications and economical and practical today. Such as exhibition centers, stadiums or some other large public buildings have been used.   In recent years, with the continuous growth of my country's steel production, steel structures, with their own advantages, account for an increasing proportion of buildings, and steel pipe structures have also made great breakthroughs. The biggest advantage of the steel pipe structure is that it can perfectly combine the functional requirements, sensory requirements and economic benefits of people's buildings. The pipe truss structure in the steel pipe structure is favored by people with its unique advantages. ______________________ Whatsapp/Tel:+ 86/13056229023 E-mail:safs121@safsteelstructure.com www.safsteelstructure.com
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