Topic : Common Structural Forms for High-rise Buildings in Hong Kong
Topic : Common Structural Forms for High-rise Buildings in Hong Kong Topic : Common Structural Forms for High-rise Buildings in Hong Kong
Features of In-situ concrete frame constructionConstruction aspects – examples of problemExterior environmentInterior environmentIt is difficult to maintain a clean and tidy site using in-situconcrete structure for the casting process is wet and dirtyFeatures of In-situ RC frame constructionConstruction aspects (continue)5. Easier to allow for dimensional discrepancy – formworkcan relatively easy to provide any ready dimension andshape6. Concrete is cheap, easy available and can be cast intocomplicated shape7. Frame erection affected seriously by climatic condition – inwindy day it is difficult to erect formwork nor to placeconcrete8. Durability affect by heat, moisture or environmentalfactors – concrete is not so durable as most person think28
Features of in-situ RC frame construction (cont.)Structural characteristics and design aspects1. Concrete design more flexible and accurate than steelbecause of non dependence on standard sections2. Concrete frame easily damaged by building movements3. Problems of creep & shrinkage (cause damage to finishes)4. Higher dead load and bigger structural elements5. Better fire resistance6. Durability sensitive to workmanship7. Overloading cause irreversible structural damages8. Flexible in layout and shapeTypical case using traditionaltimber formwork for framestructure in RC with loadbearingwallsThe CCCU Building of CityU29
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Features of <strong>in</strong>-situ RC frame construction (cont.)<strong>Structural</strong> characteristics and design aspects1. Concrete design more flexible and accurate than steelbecause of non dependence on standard sections2. Concrete frame easily damaged by build<strong>in</strong>g movements3. Problems of creep & shr<strong>in</strong>kage (cause damage to f<strong>in</strong>ishes)4. <strong>High</strong>er dead load and bigger structural elements5. Better fire resistance6. Durability sensitive to workmanship7. Overload<strong>in</strong>g cause irreversible structural damages8. Flexible <strong>in</strong> layout and shapeTypical case us<strong>in</strong>g traditionaltimber <strong>for</strong>mwork <strong>for</strong> framestructure <strong>in</strong> RC with loadbear<strong>in</strong>gwallsThe CCCU Build<strong>in</strong>g of CityU29
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