离心钢管混凝土长柱轴压性能分析
|
摘要
针对离心钢管混凝土长柱,运用ABAQUS有限元软件进行模拟,采用正交试验的分析方法,研究钢管壁厚、空心率及长细比对长柱轴压承载力的影响,结果表明,各因素影响能力顺序为:钢管壁厚>空心率>长细比。钢管壁厚每增加1 mm,承载力增加约17%;空心率每增加0.08,承载力减少约9%;长细比每增加10,承载力降低幅度均小于1%。将有限元计算结果与现有相关规范中的叠加理论和统一理论计算结果比较表明,理论计算值较有限元模拟值偏小7%～9%。工程运用中选用统一理论进行计算,更偏于安全。
Aiming at the long column of centrifugal concrete filled steel tube,ABAQUS finite element software and orthogonal test method are used to study the influence of the wall-thickness,hollow ratio and slenderness ratio of steel tube on the axial compression bearing capacity of long column. The results show that the order of influencing capacity of each factor is:wall-thickness > hollow ratio > slenderness ratio. For every 1 mm increase in wall thickness,the bearing capacity increases by about 17%;for every 0.08 increase in hollow ratio,the bearing capacity decreases by about 9%;for every 10 increase in slenderness ratio,the reduction of compression bearing capacity is less than 1%. Comparing the results of FEM calculation with those of superposition theory and unified theory in existing specification,it is shown that the theoretical calculation value is 7%～9% larger than that of FEM simulation value. Unified theory is chosen to calculate in engineering application,and it is much Safer.
Aiming at the long column of centrifugal concrete filled steel tube,ABAQUS finite element software and orthogonal test method are used to study the influence of the wall-thickness,hollow ratio and slenderness ratio of steel tube on the axial compression bearing capacity of long column. The results show that the order of influencing capacity of each factor is:wall-thickness > hollow ratio > slenderness ratio. For every 1 mm increase in wall thickness,the bearing capacity increases by about 17%;for every 0.08 increase in hollow ratio,the bearing capacity decreases by about 9%;for every 10 increase in slenderness ratio,the reduction of compression bearing capacity is less than 1%. Comparing the results of FEM calculation with those of superposition theory and unified theory in existing specification,it is shown that the theoretical calculation value is 7%～9% larger than that of FEM simulation value. Unified theory is chosen to calculate in engineering application,and it is much Safer.
引文
[1]李士祥.薄壁离心钢管混凝土结构的试验研究[J].华东电力,1993(10):4-8.
[2]焦联江,赵正山.薄壁离心钢管混凝土结构及其质量控制[J].特种结构,2002,19(2):74-76.
[3]褚思文,顾迅杰,余颖.基于FRP加固钢管混凝土柱承载力计算的比较分析[J].安徽建筑大学学报,2016,24(4):22-25.
[4]余小龙,王成刚,柳炳康,等.方钢管再生混凝土长柱偏心受压试验研究[J].合肥工业大学学报(自然科学版),2017,40(8):1110-1116.
[5]卢方伟,周鼎,董永.离心钢管混凝土柱力学性能研究[J].混凝土,2010(5):43-45,48.
[6]张兆强.基于统一强度理论的离心钢管混凝土柱轴压承载力研究[J].四川建筑,2009,29(1):165-168.
[7]钟善桐,徐国林.空心钢管混凝土轴压构件的工作性能[J].哈尔滨工业大学学报,2006,38(9):1479-1482+1503.
[8]赵昕.离心钢管混凝土抗压性能研究[D].合肥:合肥工业大学土木与水利工程学院,2017.
[9]王宏伟,钟善桐,徐国林.空心钢管混凝土长柱轴压性能的试验研究[J].工业建筑,2006,36(12):69-72,27.
[10]张熙德,关群,李凡.基于正交试验的深基坑变形影响因素研究[J].安徽建筑大学学报,2018,26(1):22-27.
[11]丁发兴,余志武,欧进萍.混凝土单轴受力损伤本构模型[J].长安大学学报(自然科学版),2008,28(4):70-73.
[12]徐亚丰,金松,戴颖,等.钢骨-圆钢管高强混凝土组合长柱轴心受压分析[J].沈阳工业大学学报,2016,38(6):703-709.
[13]付占明,金松,徐亚丰.钢骨-方钢管高强混凝土组合长柱轴心受压力学性能[J].结构工程师,2018,34(1):24-30.
[14]浙江省电力设计院.薄璧离心钢管混凝土结构技术规程:DL/T 5030-1996[S].北京:中国电力出版社,1996.
[15]哈尔滨工业大学,中国建筑科学研究院.钢管混凝土结构技术规范:GB50936-2014[S].北京:中国建筑工业出版社,2014.
[2]焦联江,赵正山.薄壁离心钢管混凝土结构及其质量控制[J].特种结构,2002,19(2):74-76.
[3]褚思文,顾迅杰,余颖.基于FRP加固钢管混凝土柱承载力计算的比较分析[J].安徽建筑大学学报,2016,24(4):22-25.
[4]余小龙,王成刚,柳炳康,等.方钢管再生混凝土长柱偏心受压试验研究[J].合肥工业大学学报(自然科学版),2017,40(8):1110-1116.
[5]卢方伟,周鼎,董永.离心钢管混凝土柱力学性能研究[J].混凝土,2010(5):43-45,48.
[6]张兆强.基于统一强度理论的离心钢管混凝土柱轴压承载力研究[J].四川建筑,2009,29(1):165-168.
[7]钟善桐,徐国林.空心钢管混凝土轴压构件的工作性能[J].哈尔滨工业大学学报,2006,38(9):1479-1482+1503.
[8]赵昕.离心钢管混凝土抗压性能研究[D].合肥:合肥工业大学土木与水利工程学院,2017.
[9]王宏伟,钟善桐,徐国林.空心钢管混凝土长柱轴压性能的试验研究[J].工业建筑,2006,36(12):69-72,27.
[10]张熙德,关群,李凡.基于正交试验的深基坑变形影响因素研究[J].安徽建筑大学学报,2018,26(1):22-27.
[11]丁发兴,余志武,欧进萍.混凝土单轴受力损伤本构模型[J].长安大学学报(自然科学版),2008,28(4):70-73.
[12]徐亚丰,金松,戴颖,等.钢骨-圆钢管高强混凝土组合长柱轴心受压分析[J].沈阳工业大学学报,2016,38(6):703-709.
[13]付占明,金松,徐亚丰.钢骨-方钢管高强混凝土组合长柱轴心受压力学性能[J].结构工程师,2018,34(1):24-30.
[14]浙江省电力设计院.薄璧离心钢管混凝土结构技术规程:DL/T 5030-1996[S].北京:中国电力出版社,1996.
[15]哈尔滨工业大学,中国建筑科学研究院.钢管混凝土结构技术规范:GB50936-2014[S].北京:中国建筑工业出版社,2014.