| Summary: | 碩士 === 國立中興大學 === 土木工程學系 === 91 === There is no previous case in lightweight aggregate burned from reservoir sediment all over the world. But in Taiwan one factory has successfully developed this technology recently. This technology can change the sediment into resource. The purpose of this project is to assess the economy of the steel structure built using the lightweight aggregate concrete (LWAC). The assessment is aimed at one aspect which is the construction cost. In the aspect of construction cost, three simulated buildings of 7, 20 and 60 floors were analyzed and one real building of 26 floors was used to verify the analysis. The analyzed results in the aspect of construction cost indicate that although the cost of the LWAC is 50% higher than NWAC, the high-rise building made by LWAC can be cheaper than that made by NWAC after some turning-point floor. But the turning points will be influenced by the total dead load. In the structure system used in this project, the turning point will be at 42nd floor if the total dead load is 370kg/cm2, 26th floor if the total dead load is 700kg/cm2 and 13th floor if the total dead load is 1000kg/cm2. In addition, the analyzed results also show that the turning point will be affected by different structure systems.
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