Endurance Test Research Of Steel Reinforced Concrete L-Shaped Column Under High Temperature

There is a new type of structure of steel and rebar embedded in concrete that Steel Reinforced concrete special-shaped column cross section. Steel Reinforced concrete special-shaped column has many advantages, for example room smooth and beauty, flexible of structure arrangement and so on. For the steel in the middle of the column section, the disadvantages of concrete are reduce. With the development of science and technology, the steel reinforced concrete special-shaped columns will be widely usedo In order to protect the personal safety and reduce the economic loss, demands for resistance requirements are getting higher and higher. At present, there are no available on the fire resistance of Steel Reinforced concrete special-shaped column。 Based on systemic research and the analytical solution, some result can be got。Based analysis of information by ABAQUS and a model test, this paper studied the fire resistance of the column. The main research contents and conclusions are as follows.1.This paper studies 3 specimens that considers the influence of axial compression ratio. Though the temperature reached a certain value at constant load, the temperature field calculation and axial displacements can be achieve. The result provides that (1) with the diffident axial compression ratio, the tend of temperature field calculation is same, but the rising rate is diffident. (2) The axial displacement curve of analytical solution changes basically as the same for curve of systemic research as time goes on. The axial displacements are raised with temperature。2. The reasonable theoretical analysis model is set up by ABAQUS. According to the models, the mechanism of concrete structure is studied under fire. Compared experimental design to the simulation value, the temperature field calculation and axial displacements can be achieve. The result provides that 1) the results of experiment and simulation can tally well. (2) the temperature field calculation of the analytical solution is 1.2%～12.6% higher than test results; (3) the axial displacements of the analytical solution is 7.9%～34% lower than test results.3. Based on equivalent heat charge, the results indicate that(1) the temperature f of the analytical solution is 50%～30% higher than test results;(2) the axial displacements of the analytical solution is 30%～65% lower than test results.