Energy-saving Design Of Steel-framed Residential Buildings

Steel-structure residence has been well-recognized as a kind of green architecture to meet the housing industry. However, due to the thermal conductivity of steel itself is thirty three times higher than that of concrete, the energy-saving of steel frame residential is even more severe. In this paper, Ansys finite element software is used to analyze the insulation of thermal bridge in steel structure housing in Hot Summer and Cold Winter Zone, analysis of thermal stress in masonry-infilled steel frames is also involved. Some regular conclusions are summed up to provide references for the design.First, steady-state heat transfer model is used to analyze the thermal performance of thermal bridges in steel-structure houses with thermal self-insulation system, and the advantages and disadvantages of different forms of steel columns and insulation forms are summed up. The minimum insulation for the different steel columns are calculated out to meet the non-condensing principal in winter.When the analysis for energy-saving of steel columns is done, new analysis for steel columns with steel cantilever beam is carried out. While the cantilever beam makes it easier to build balconies and awnings, this structure also brings out local energy losing problem. This paper presents a new type of partial insulation for the cantilever beams to eliminate this problem, and the empirical formulas for this construction are also given.By summarizing the existing forms of energy-saving envelope of residential building, this article puts forward two concepts: self-made energy-saving construction and the composite energy-saving construction. Two types of new energy-saving H-column are designed. Compared with the ordinary H-column and normal castellated column, it is pointed out that these new types of columns perform excellent both in thermal and structure properties.The final analysis is concerned about the thermal stress of masonry-infilled steel frames with different temperature loads. The rules of thermal stress' distribution are summarized. And the conclusion is that with the thermal effects, masonry in the steel frame is more tending to crack than that in regular concrete frame. Finally, some common crack controlling methods are analyzed.