Stress Performance And Thermal Effect Analysis On Short BEAM

With rapid population growth, low-level and single-function building has failed to meet the people’s life and work demands, therefore, multi-functional high-rise buildings in dense urban development has brought convenience of life and work. Multi-purpose and high-rise building requires the transition of structural arrangement, beam conversion layer structure is a form of structural change of high-rise building, so the transfer beam is to ensure the structural safety of critical components. Seismic Design of high-rise structures require section height of conversion is less than one fifth of span of the conversion beam, the current range of applications in engineering,common value of cross-height ratio of conversion beam is from3to5, neither deep beams nor ordinary beam, they are short beam. Thus, in general, short beam is effected by the same load, comparing with the deep beam and common beam, they have different force model, they will appear performance of general destruction of the bending beam, but also do performance of shear failure of deep beam. With a new design of concrete structures, this paper which is based on the results of experiments of deep beams by our special study group analysis flexural bending properties and shear properties of oblique section of reinforced concrete short beam without web reinforcement, and verify the strut-and-tie truss model when short beam subjected to shear.Since the emergence of new building materials, the project was the use of structural materials is even more diverse。 Lightweight aggregate concrete is one of them, due to its characteristics, lightweight aggregate concrete is used for many high-rise buildings, the underlying basis of poor soil structure, prefabricated structure, large-span roof, a high degree of structural fire protection, earthquake resistant structure, floating structures, bridge engineering, and concrete structure construction for art performance. This article studied the ordinary short concrete beams, and also studied the short beam of lightweight aggregate concrete, to provide the basis for the application of lightweight aggregate concrete beams.Influence of curing temperature on mechanical properties of concrete is an important factor, the degree of development of the mechanical properties of concrete by concrete hydration reaction degree, curing temperature is high, concrete hydration more thoroughly, the mechanical performance of concrete development. And to a certain age, hydration reaction is completed, the mechanical properties of concrete progress is slow, even because of the high temperature is spray product expansion, late hinders its mechanical properties development, therefore, according to the temperature of the concrete specimens performance, simulation of different curing environment, analysis of short beams in the conservation of the environment conservation after a certain age mechanical property and deformation property.