恒高温作用后钢管混凝土短柱轴压试验

Test and research on axial pressure behavior of concrete filled steel tubes after constant temperature

通过对20个圆形钢管混凝土短柱试件在恒高温作用后的轴压承载力试验,研究了圆形钢管混凝土短柱的轴压力学性能.重点研究了载荷 应变的变化规律,在分析试验数据的基础上,探讨了试验中恒温温度t和恒温时间h的选择对试验结果的影响.在恒高温作用后钢管混凝土力学性能的试验研究中发现,恒温温度的设定应对特殊温度段给予特殊考虑,恒温时间应适当延长.

The behavior of circular stub columns of concretefilled steel tubes with circular sections after high constant temperature subjected to axial load was investigated experimentally and the relation of the loadstrainh was mainly researched into.20 specimens were studied.The impact of the selection of the constant temperature T and constant time on the results of test are analyzed based on the test.The study shows that the design of constant temperature should take into consideration of the special temperature section and the constant time should be somewhat extended.The result of this test can be of reference to the future test of CSFT after constant temperature.