摘要
基于有限元软件建立了“十”字异形双层钢管空心混凝土柱在轴向压力下的有限元模型。根据有限元模拟分析,对“十”字异形双层钢管空心混凝土柱在轴向压力作用下进行研究,讨论了柱子在轴压作用下的极限承载力、荷载-位移曲线、破坏形态和延性性能等。结果表明:内钢管(D=50 mm)的设置能提高整体承载能力的25%左右,且延性提高,挖去内层混凝土后,对极限承载能力影响不明显;柱子高度越高对极限承载力的不利影响越大,延性降低;极限承载能力随夹层混凝土抗压强度的增大而增大但延性降低。将模拟与试验相比较,结果大致相同。
Based on the finite element software,the finite element model of the“+”shaped double-layer steel tube hollow concrete column under axial pressure was established.According to the finite element simulation analysis,the“+”shaped double-layer steel tube hollow concrete column under axial compression was studied,and the load-displacement curve,ultimate bearing capacity,failure form and ductility performance of the column under axial compression were discussed.The results show that the installation of the inner steel pipe(D=50 mm)can increase the overall load-bearing capacity by about 25%,and the ductility is improved.After the inner layer of concrete is excavated,the ultimate load-bearing capacity is not obvious;the higher the height of the column,the greater the adverse effect on the ultimate bearing capacity and the lower the ductility;the ultimate bearing capacity increases with the increase in the compressive strength of the sandwich concrete but the ductility decreases.Comparing the simulation with the experiment,the results are roughly the same.
作者
路倩倩
赵澄
李云峰
LU Qian-qian;ZHAO Cheng;LI Yun-feng(Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, Shandong University of Science and Technology, Qingdao 266590, China)
出处
《科学技术与工程》
北大核心
2021年第15期6408-6415,共8页
Science Technology and Engineering
基金
山东省科技计划(2013YD02043)。
关键词
有限元模拟
“十”字异形柱
双层钢管混凝土
轴心受压
荷载位移曲线
finite element simulation
“+”shaped column
concrete-filled double-tube
axial compression
load-displacement curve