长期持续荷载下中空钢管混凝土(CFDST)柱的研究

给出了一组长期持续荷载下中空钢管混凝土(CFDST)柱的试验结果。试验包括两个阶段:长期正常使用阶段的试验和极限强度试验。给出了长期持续荷载下CFDST柱的数值模型。数值结果与试验结果吻合很好。另外,详细分析了CFDST柱的长期性能。最后,给出了计算长期持续荷载下CFDST柱的极限强度的简化方程。

Concrete-Filled Double Skin Steel Tubular(CFDST) Columns Subjected to Long-Term Sustained Loading

This paper carried out a series of tests on concrete-filled double skin steel tubes(CFDST) columns under long-term sustained loading condition.The test process included two stages,i.e.long-term service test and ultimate strength test.Numerical models on analysis of the CFDST column under long-term sustained loading were presented.A comparison of results calculated using these models showed generally good agreement with the test results.Additionally,a detailed analysis was performed to analyse the long-term behaviour of CFDST columns.Finally,simplified formula for calculating the ultimate strength of CFDST columns subjected to long-term sustained loading was proposed.