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目前显示的是 十月, 2022的博文

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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 are the advantages of membrane structure？

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  What are the advantages of membrane structure？ Membrane structure 1. Artistic: novel and beautiful, reflecting the beauty of the structure, and rich in color. 2. Economy: because the membrane has a certain light transmission rate, the lighting intensity and time can be reduced during the day, which can save energy very well. 2. Economy: Since the membrane has a certain light transmission rate, it can reduce the intensity and time of lighting during the day, which can save energy well. 3. Large span: membrane structure can fundamentally overcome the difficulties encountered in the realization of traditional structures on large span (unsupported) buildings. 4. Self-cleaning: the use of membrane materials with protective coating in membrane buildings can give the building a good white clean effect while ensuring the service life of the building. 5. Short construction period: all processing and production in membrane building projects are done in the factory, which can reduce the co...
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What is the difference between Glass floss and rock wool?

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  What is the difference between Glass floss and rock wool? Glass floss Rock wool 1. The difference in production materials Glass floss  is made of glass as the main raw material Rock wool is made of exquisite basalt as the main material 2. the difference in product use Glass floss  is generally used for insulation parts below 200 degrees Celsius, mostly for general building or low temperature pipeline insulation. Rock wool is generally used for insulation parts with a temperature of 500 degrees Celsius, mostly used for insulation of high-temperature heat pipes or electric power equipment.
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  The chessboard -shaped quadrilateral mesh grid has good overall and stability, flexible plane layout, the upper string rod of the structure is short and the lower chord is long. The rods of the exchange are relatively small, the roof structure is simple, and the construction is convenient. The emergence of a large number of new materials, new processes, and new technologies in modern times fully reflects the advancedness, economy and rationality of the grid structure. In the future, the chessboard -shaped quadrilateral cone network shelf will be used more and more many.
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