Bearing Capacity Of Glazed Hollow Bead Insulation Concrete Beams And Columns After Exposure To Elevated Temperatures

Glazed hollow bead insulation concrete is a new type of building materials, which can meet the requirements of building load-bearing and energy-saving insulation at the same time. The general building insulation system starts being constructed after the construction of main structure. In contrast to the general building insulation system, the glass hollow beads insulation concrete system can be completed when the main structure is finished. Glass hollow beads insulation concrete system reduces the amount of engineering design and the construction costs, it also integrates insulation with load-bearing. Glass beads of insulation concrete insulation system is characterized by the feature of long-life, non-polluting, insulation properties and integrity. It can be used in multi-storey and high-rise buildings, with high technical and economic value.Reinforced concrete structures run at room temperature generally, but its temperature sharp rises in a short period of time after the fire. What’s more, some special-purpose industrial buildings long-term work in a high-temperature environment. Glazed hollow bead insulation concrete and the steel of components also exist in a high-temperature environment. Mechanical properties and thermal performance of them change significantly, which include compressive strength, tensile strength, elastic modulus and thermal conductivity. The change of these properties will affect the performance of the components at high temperatures, thereby affecting the entire building structure. The properties of glazed hollow bead insulation concrete and its components at high temperatures are analyzed by experimental and theoretical method.Different temperatures and cooling methods are considered in this test. Data is acquired after completion of the test. The significant impact of these two factors to mechanical properties and thermal performance are analyzed by SPSS. The sections’temperature field of three sides heated high-temperature beams and four heated high-temperature column of glazed hollow bead insulation concrete components are analyzed by ABAQUES. The calculation method of the temperature field of the beams and columns of glazed hollow bead insulation concrete components are put forward. Mechanical properties and thermal performance of the steel in glazed hollow bead insulation concrete components are posed.According to the sections’ temperature field, isotherms of the sections of three sides heated high-temperature beams and four heated high-temperature column of glazed hollow bead insulation concrete components are made. Combining with properties of glazed hollow bead insulation concrete and steel in its components, bearing capacity formula of three sides heated high-temperature beam, large eccentric compression column and small eccentric compression column are deduced. The high-temperature bearing capacity of a frame column in a construction engineering is calculated, which is in line with the actual situation.The sections’temperature field and high-temperature bearing capacity of three sides heated high-temperature beams and four heated high-temperature column of glazed hollow bead insulation concrete components provide reference and basis for fire damage assessment, post-disaster restoration and high-temperature structural design of glazed hollow bead insulation concrete.