The Analysis Of Transverse Rib And Rib Angle Influence On Structural Strength And Thermal Performance Of Hollow Block

The economic can’t develop without the favorable support of energy. But,The severe energy situation always restricts the sustainable development of economy. Therefore,save energy,improve the efficiency of development and use of New Energy, to ensure the sustainable development of energy,has become an urgently problem to be solved in our country and the development of the world economy.The building energy-consumption holds great proportion in social total energy-consumption,and the lost energy-consumption of Enclosure structure accounts for 72% in Building energy-consumption,so it is imperative to improve the thermal insulation property of Enclosure structure.At present,Concrete Hollow Block is widely applied in Enclosure structure,designing and optimizing the thermal insulation property of Concrete Hollow Block is the key for researchers.In this context, this article used the ANSYS finite element software and related test equipment to study the structure property and thermal performance of Hollow Block,and according to the conclusion, it was optimized for the new light weight aggregate Concrete Hollow Block.The specific analysis and calculation results are as follows:(1)Simulation analysis based on ANSYS software, Hollow Block transverse rib and rib angle was weak part for pressure, when the transverse rib thickness decreased from 40 mm to 20 mm, the compressive strength of Hollow Block decreased by 24.78%; When Rib angle radius increased from 0mm to 15 mm, the compressive strength, tensile strength increased by 41.67%, 58.33%. Just from the angle of mechanics analysis: Transverse rib thickness and rib radius was more favorable with increasing.(2)The transverse Rib of Hollow Block is a bridge for heat transfer-thermal bridge. Transverse rib thickness decreased from 40 mm to 20 mm, the heat transfer coefficient was reduced by 4.06%; Rib angle radius increased from 0mm to 15 mm, the heat transfer coefficient increased by 4.41%. Just from the perspective of heat transfer analysis:Transverse rib thickness and rib radius of Block was the smaller the better.The experimental comparison of typical seasonal :Heat transfer can be enhanced by large temperature difference, so the heat loss in winter was significantly greater than summer,up to 46.65%.(3)Analysing the results of Simulation and test, integrating many factors, and then coupling analysis,the following three kinds of Hollow Block’s model what was optimized and designed were put forward.(when the material was light weight aggregate concrete):The size of M1 was 390*200*115mm, the optimized result :When the middle rib was 30 mm, rib angle was 7mm,Heat transfer coefficient was 1.1376W/(m2·K).The size of M2 was 390 * 190 * 190 mm, the rib angle changed, the compressive strength of Block increased by 12%,the heat transfer coefficient was 0.931W/(m2·K).The size of M3 was 390 * 240 * 190 mm, as part of the load-bearing walls, the compressive strength of optimized model increased by 18.7%, the heat transfer coefficient was 0.7706W/(m2·K).