钢骨混凝土短柱在长期轴向荷载作用下的试验研究

发布时间：2018-04-30 17:56

本文选题：钢骨混凝土 + 柱　；参考：《工程力学》2015年08期

【摘要】：钢骨混凝土柱结构在过去几十年间已得到广泛的运用。但是目前关于这种柱结构在长期荷载作用下由于徐变和收缩引起的与时间相关的力学性能研究还开展得很少。该文开展了钢骨混凝土短柱的长期轴向荷载试验研究,还进行了这些柱的极限承载力破坏试验。试验监测了由徐变和收缩引起的柱的轴向长期变形。基于该实测曲线的分析表明,采用ACI 209R-92的收缩模型和CEB-FIP90的徐变模型,利用龄期调整有效模量法可以较好地模拟钢骨混凝土柱在长期轴向荷载作用下的变形发展。经历了长期加载后的试验柱的极限承载力破坏试验还表明,长期轴向荷载对柱的轴压承载力没有显著影响。
[Abstract]:Steel reinforced concrete column structure has been widely used in the past decades. However, there are few researches on the time-dependent mechanical properties of this kind of column structures due to creep and shrinkage under long term loads. In this paper, the long term axial load test of short steel reinforced concrete columns is carried out, and the ultimate bearing capacity failure test of these columns is also carried out. The axial long-term deformation of columns caused by creep and shrinkage was monitored experimentally. Based on the analysis of the measured curves, it is shown that the shrinkage model of ACI 209R-92 and the creep model of CEB-FIP90 can be used to simulate the deformation and development of steel reinforced concrete columns under long term axial load. The ultimate bearing capacity failure test of the test column after long term loading also shows that the long term axial load has no significant effect on the axial bearing capacity of the column.
【作者单位】：厦门大学土木工程系;
【基金】：国家自然科学基金项目(50908197) 福建省自然科学基金项目(2009J05135)
【分类号】：TU398.9

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