内配型钢圆钢管混凝土压扭构件工作机理研究
|
摘要
采用ABAQUS有限元软件建立了内配型钢圆钢管混凝土压扭构件的有限元模型,利用已有试验数据验证了模型的可靠性。在截面含钢率不变的情况下,分析了3组钢管混凝土与内配型钢圆钢管混凝土极限承载力及扭矩分配的对比情况。通过对典型试件的分析,研究了内配型钢圆钢管混凝土各部件之间的接触应力分布规律、各部件的破坏模态及型钢对混凝土的影响规律。最后分析了加载路径、长细比、型钢截面形式以及轴压比对构件荷载-位移曲线的影响规律。结果表明:内配型钢圆钢管混凝土中钢管、混凝土及型钢三者之间可以很好地协调工作。钢管含钢率是影响构件承载力最主要的因素,加载路径、长细比以及型钢的截面形式对构件的承载力几乎没有影响,构件的极限承载力随轴压比的增大而增大,当轴压比大于0.4~0.5(对应不同强度等级材料)时,构件的极限承载力随着轴压比的增大而降低。
Using finite element analysis software ABAQUS to build the finite element analysis model of concrete-filled steel tubular member with encased profiled steel under compression and torsion and prove the correctness of this model. In case of the steel ratio of the section is constant,the paper analyzed the ultimate bearing capacity and torsion distribution of three CFST and concrete-filled steel tubular members with encased profiled steel under compression and torsion. Through the analysis of typical specimens,the paper studied the distribution of the contact stress among the components of members and the failure mode of components. Finally,the paper analyzed the influence of loading path,length ratio,section form of encased profiled steel and axial compression ratio. The results showed that the steel tube,concrete and the encased profiled steel were well coordinated. Steel tube ratio was the most important factors that affected the bearing capacity,the loading path,length ratio and the section form of encased profiled steel had little impact on the bearing capacity of the members.The ultimate bearing capacity increased with the increase of the axial compression ratio,when the axial compression ratio was over 0. 4 ~ 0. 5,the bearing capacity of the component would decrease with the increase of axial compression ratio.
Using finite element analysis software ABAQUS to build the finite element analysis model of concrete-filled steel tubular member with encased profiled steel under compression and torsion and prove the correctness of this model. In case of the steel ratio of the section is constant,the paper analyzed the ultimate bearing capacity and torsion distribution of three CFST and concrete-filled steel tubular members with encased profiled steel under compression and torsion. Through the analysis of typical specimens,the paper studied the distribution of the contact stress among the components of members and the failure mode of components. Finally,the paper analyzed the influence of loading path,length ratio,section form of encased profiled steel and axial compression ratio. The results showed that the steel tube,concrete and the encased profiled steel were well coordinated. Steel tube ratio was the most important factors that affected the bearing capacity,the loading path,length ratio and the section form of encased profiled steel had little impact on the bearing capacity of the members.The ultimate bearing capacity increased with the increase of the axial compression ratio,when the axial compression ratio was over 0. 4 ~ 0. 5,the bearing capacity of the component would decrease with the increase of axial compression ratio.
引文
[1]徐积善,宫安.钢管混凝土短柱在压扭复合受力下的试验研究[C]//中国钢协钢-混凝土组合结构协会第三次年会论文集.鞍山:1991.
[2]韩林海,钟善桐.钢管混凝土纯扭转问题研究[J].工业建筑,1995,25(1):7-13.
[3]陈宇超.矩形钢管混凝土构件复合受力时力学性能与设计方法研究[D].兰州:兰州理工大学,2009.
[4]黄宏,郭晓宇,陈梦成.圆中空夹层钢管混凝土压扭构件有限元分析[J].建筑结构学报,2013,34(增刊1):332-338.
[5]郭立湘,李婷,杨建,等.方中空夹层钢管混凝土压扭构件承载力计算方法研究[J].铁道建筑,2014(7):4-7.
[6]徐积善,GEORGE L K C,CHANG K.钢管混凝土短柱在压扭共同作用下的试验研究[J].北京建筑工程学院学报,1991(2):1-10.
[7]郭立湘,李婷,杨建,等.方中空夹层钢管混凝土压扭构件的试验及有限元计算研究[J].工业建筑,2015,45(7):148-152.
[8]黄宏,郭晓宇,陈梦成.圆中空夹层钢管混凝土压扭构件试验研究[J].工程力学,2015,30(1):101-110.
[9]韩林海.钢管混凝土结构:理论与实践[M].3版.北京:科学出版社,2016.
[10]沈聚敏,王传志.钢筋混凝土有限元与板壳极限分析[M].北京:清华大学出版社,1993.
[11]BECK J,KIYOMIYA O.Fundamental Pure Torsional Properties of Concrete Filled Circular Steel Tubes[J].Materials,Construct Structure Pavements,JSCE,2003,739(60):285-296.
[12]周竞.钢管混凝土中长柱在压扭复合受力下的试验研究[D].北京:北京建筑工程学院,1990.
[13]陈逸伟.钢管混凝土柱形状因素于扭转韧性行为研究[D].台北:中央大学,2003:21-50.
[14]宫安.钢管混凝土短柱在压扭复合受力下的研究[D].北京:北京建筑工程学院,1989.
[15]尧国皇.钢管混凝土构件在复杂受力状态下的工作机理研究[D].福州:福州大学,2006.
[2]韩林海,钟善桐.钢管混凝土纯扭转问题研究[J].工业建筑,1995,25(1):7-13.
[3]陈宇超.矩形钢管混凝土构件复合受力时力学性能与设计方法研究[D].兰州:兰州理工大学,2009.
[4]黄宏,郭晓宇,陈梦成.圆中空夹层钢管混凝土压扭构件有限元分析[J].建筑结构学报,2013,34(增刊1):332-338.
[5]郭立湘,李婷,杨建,等.方中空夹层钢管混凝土压扭构件承载力计算方法研究[J].铁道建筑,2014(7):4-7.
[6]徐积善,GEORGE L K C,CHANG K.钢管混凝土短柱在压扭共同作用下的试验研究[J].北京建筑工程学院学报,1991(2):1-10.
[7]郭立湘,李婷,杨建,等.方中空夹层钢管混凝土压扭构件的试验及有限元计算研究[J].工业建筑,2015,45(7):148-152.
[8]黄宏,郭晓宇,陈梦成.圆中空夹层钢管混凝土压扭构件试验研究[J].工程力学,2015,30(1):101-110.
[9]韩林海.钢管混凝土结构:理论与实践[M].3版.北京:科学出版社,2016.
[10]沈聚敏,王传志.钢筋混凝土有限元与板壳极限分析[M].北京:清华大学出版社,1993.
[11]BECK J,KIYOMIYA O.Fundamental Pure Torsional Properties of Concrete Filled Circular Steel Tubes[J].Materials,Construct Structure Pavements,JSCE,2003,739(60):285-296.
[12]周竞.钢管混凝土中长柱在压扭复合受力下的试验研究[D].北京:北京建筑工程学院,1990.
[13]陈逸伟.钢管混凝土柱形状因素于扭转韧性行为研究[D].台北:中央大学,2003:21-50.
[14]宫安.钢管混凝土短柱在压扭复合受力下的研究[D].北京:北京建筑工程学院,1989.
[15]尧国皇.钢管混凝土构件在复杂受力状态下的工作机理研究[D].福州:福州大学,2006.