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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 ...

What are the superiority of the space frame structure?

What are the superiority of the space frame structure?

space frame

1. Space work, simple force transmission path, is a better large-span roof structure.

2. Light weight, good economic index.

3. Large stiffness, good seismic performance.

4. Easy construction and installation.

5. The rods and nodes are easy to be stereotyped and commercialized, and can be produced in batches in the factory, which is conducive to improving production efficiency.

6. The plan layout of the net frame is flexible and the roof is flat, which is conducive to the ceiling, installation of pipes and equipment.

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