Full Process Test of Low Eccentric Compression SRC Columns under Fire
|School||Suzhou Institute of Technology|
|Keywords||Steel reinforced concrete (SRC) columns experimental studies full process under and after fire temperature field mechanical properties|
Steel reinforced concrete (SRC) structures are extensively utilized in multi-storey and high-rise structures. It has distinct economic and structural advantages, such as high load bearing capacity, excellent earthquake resistance qualities, and good anti-erosion proper- ties. Compared with steel and concrete structures, a few research work has been done on the behavior of SRC columns under fire. It is valuable to do some research on the behavior of SRC columns under fire, so as to ensure its fire safety and provide reference to practical engineeringThe main contents are as follow:Firstly, by reviewing the relevant literatures and comparing the research results of different researchers of foreigners and Chinese,thermal and mechanical properties of concrete and steel at high temperatures are selected. Especially thermal and mechanical properties as the temperature decreasing are established .Secondly, to learn the behavior of SRC columns under real fire hazard, full process test of low eccentric compression SRC column under fire and after fire exposure has been done, including specimen design and fabrication, loading device and measuring system, phenomenon under and after fire and the test results.Thirdly, a general finite element software ANSYS is utilized to establish the 3D model for calculating the temperature field and mechanical performances of SRC columns during the whole period of fire, which is verified by experiments data. Typical deformation -time curve of SRC columns during the whole period of fire is obtained. Influence of parameters on the mechanical performance of SRC columns during the whole period of fire and residual deformation ratio is analyzed.Based on the work, following conclusions can be obtained: load ratio and temperature ascending time ratio are the important influencing parameters to the mechanical performance and the residual deformation ratio of SRC columns during the whole period of fire. The calculated results agree well with that of test.