轴压“十”字异形双层钢管空心混凝土柱受力性能  

Mechanical Performance of the“+”Shaped Double-layer Steel Tube Hollow Concrete Column under Axial Compression

作　　者：路倩倩 赵澄 李云峰[1] 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)

机构地区：[1]山东科技大学山东省土木工程防灾减灾重点实验室,青岛266590

出　　处：《科学技术与工程》2021年第15期6408-6415,共8页Science Technology and Engineering

基　　金：山东省科技计划(2013YD02043)。

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.

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 

分 类 号：TU392.3[建筑科学—结构工程]