空心大小对钢管混凝土轴压力学性能的试验研究
|
摘要
为了研究空心大小对钢管混凝土柱轴心受压承载力的力学性能影响,本文通过室内试验对9根不同空心位置和不同空心比例的钢管混凝土构件进行轴压承载力试验。结果表明,不同空心比例试件荷载-位移曲线走势一致,构件极限受压承载力均随空心比例的增加而减小;不同空心比例的构件侧向挠度沿柱高方向变化趋势一致,侧向挠度最大值均发生在构件跨中处;不同空心位置试件在进行轴压试验时,极限受压承载力和侧向挠度均不相同。参考国内相关规范,对编号B1-0的构件进行承载力验算,验证了试验结果的正确性,最后,通过对试验数据的曲线拟合并引入空心系数β,在实测参数范围内,提出了该类空心构件承载力的计算方法,并用该计算方法对其余空心构件进行轴心受压承载力计算,可为实际工程提供一定的计算依据。
In order to study the effect of hollow ratio on the mechanical properties of the bearing capacity of CFST column, through the indoor test of 9 different hollow position and different hollow ratio of steel tube concrete member axial compression bearing capacity experiment is carried out. The results show that the load-displacement curve of concrete-filled steel tube is consistent, and the load bearing capacity of the components decreases with the increase of hollow ratio. The lateral hollow of concrete-filled steel tube with different hollows is consistent with the direction of the high direction of the column, and the maximum hollow of the lateral hollow is in the span of the member. The ultimate load bearing capacity and lateral hollow are different in axial compression test. Referring to the relevant domestic codes, the bearing capacity of the components B1-0 is checked, and the accuracy of the test results is verified. Finally, the calculating method of the bearing capacity of the hollow members is proposed by introducing the hollow coefficient into the curve fitting of the test data, and the calculation method is used to calculate the bearing capacity of other hollow members under axial compression, which can provide a certain calculation basis for practical projects.
In order to study the effect of hollow ratio on the mechanical properties of the bearing capacity of CFST column, through the indoor test of 9 different hollow position and different hollow ratio of steel tube concrete member axial compression bearing capacity experiment is carried out. The results show that the load-displacement curve of concrete-filled steel tube is consistent, and the load bearing capacity of the components decreases with the increase of hollow ratio. The lateral hollow of concrete-filled steel tube with different hollows is consistent with the direction of the high direction of the column, and the maximum hollow of the lateral hollow is in the span of the member. The ultimate load bearing capacity and lateral hollow are different in axial compression test. Referring to the relevant domestic codes, the bearing capacity of the components B1-0 is checked, and the accuracy of the test results is verified. Finally, the calculating method of the bearing capacity of the hollow members is proposed by introducing the hollow coefficient into the curve fitting of the test data, and the calculation method is used to calculate the bearing capacity of other hollow members under axial compression, which can provide a certain calculation basis for practical projects.
引文
[1] Han L H,Li W,Bjorhovde R.Developments and advanced applications of concrete-filled steel tubular (CFST) structures:Members[J].Journal of Constructional Steel Research,2014,100(5):211-228
[2] 王新忠,李传习,谢和良,等.钢管玄武岩纤维混凝土短柱轴心受压承载能力试验研究[J].硅酸盐通报,2018,37(1):284-289
[3] Liao F Y,Han L H,He S H.Behavior of CFST short column and beam with initial concrete imperfection: Experiments[J]. Journal of Constructional Steel Research, 2011,67 (12): 1922-1935
[4] Liao F Y, Han L H, Tao Z. Behavior of CFST stub columns with initial concrete imperfection: Analysis and calculations [J]. Thin-Walled Structures, 2013, 70(1): 57-69
[5] 王永贵.屈曲约束支撑及支撑框架结构抗震性能与设计方法研究[D].北京:中国矿业大学,2014
[6] 吴克川,陶忠,韦光兰,等.屈曲约束支撑加固RC框架结构振动台试验设计与研究[J].建筑结构,2015,45(9):20-25
[7] 李帼昌,王硕,田磊,等.屈曲约束支撑混凝土框架节点性能的有限元分析[J]. 工程力学, 2013, 30(S1):212-216
[8] 王志滨,张万安,池思源,等.复式薄壁方钢管混凝土构件受弯性能研究[J].建筑结构学报,2017,38(7):78-84
[9] 王志滨,高扬虹,池思源,等.复式薄壁方钢管混凝土长柱轴压稳定性能研究[J].建筑结构学报,2017,38(12):41-48
[10] 王志滨,高扬虹,池思源,等.中空夹层薄壁钢管混凝土柱偏心受压性能研究[J].建筑结构学报,2018,39(5):124-131
[11] 徐礼华,许明耀,周鹏华,等.钢管自应力自密实高强混凝土柱偏心受压性能试验研究[J].工程力学,2017,34(7):166-176
[12] 柯晓军,陈宗平,薛建阳,等.钢管高强混凝土组合柱受剪承载力计算[J].建筑结构,2018,48(2):84-87
[13] Xue J Q,Bruno B,Chen B C.Effects of debonding on circular CFST stub columns[J].Journal of Constructional Steel Research,2012,69(1):64-76
[2] 王新忠,李传习,谢和良,等.钢管玄武岩纤维混凝土短柱轴心受压承载能力试验研究[J].硅酸盐通报,2018,37(1):284-289
[3] Liao F Y,Han L H,He S H.Behavior of CFST short column and beam with initial concrete imperfection: Experiments[J]. Journal of Constructional Steel Research, 2011,67 (12): 1922-1935
[4] Liao F Y, Han L H, Tao Z. Behavior of CFST stub columns with initial concrete imperfection: Analysis and calculations [J]. Thin-Walled Structures, 2013, 70(1): 57-69
[5] 王永贵.屈曲约束支撑及支撑框架结构抗震性能与设计方法研究[D].北京:中国矿业大学,2014
[6] 吴克川,陶忠,韦光兰,等.屈曲约束支撑加固RC框架结构振动台试验设计与研究[J].建筑结构,2015,45(9):20-25
[7] 李帼昌,王硕,田磊,等.屈曲约束支撑混凝土框架节点性能的有限元分析[J]. 工程力学, 2013, 30(S1):212-216
[8] 王志滨,张万安,池思源,等.复式薄壁方钢管混凝土构件受弯性能研究[J].建筑结构学报,2017,38(7):78-84
[9] 王志滨,高扬虹,池思源,等.复式薄壁方钢管混凝土长柱轴压稳定性能研究[J].建筑结构学报,2017,38(12):41-48
[10] 王志滨,高扬虹,池思源,等.中空夹层薄壁钢管混凝土柱偏心受压性能研究[J].建筑结构学报,2018,39(5):124-131
[11] 徐礼华,许明耀,周鹏华,等.钢管自应力自密实高强混凝土柱偏心受压性能试验研究[J].工程力学,2017,34(7):166-176
[12] 柯晓军,陈宗平,薛建阳,等.钢管高强混凝土组合柱受剪承载力计算[J].建筑结构,2018,48(2):84-87
[13] Xue J Q,Bruno B,Chen B C.Effects of debonding on circular CFST stub columns[J].Journal of Constructional Steel Research,2012,69(1):64-76