西安建筑科技大学学报(自然科学版)

锥形高强中空夹层薄壁钢管混凝土构件的弯扭性能研究

(1.国网甘肃省电力公司建设分公司,甘肃兰州 730050; 2.西安建筑科技大学土木工程学院,陕西西安 710055)

Study on bending and torsional performance of tapered high strength thin-walled concrete-filled double skin steel tubular members

LI Zhengfa¹, PENG Xing², LIANG Yantao¹, LI Bofan², HUANG Linke¹, WANG Xiantie²

(1.State Grid Gansu Power Construction Company, Lanzhou 730050, China; 2.School of Civil Engineering, Xi'an Univ. of Arch.& Tech., Xi'an 710055, China)

Keywords：high strength material; concrete-filled double skin steel tubular members; thin-walled; large hollow ratio; bending and torsional performance

DOI: 10.15986/j.1006-7930.2022.04.010

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采用有限元软件ABAQUS对内、外钢管和加劲肋采用Q690钢材,混凝土采用C120高强混凝土的锥形高强中空夹层薄壁钢管混凝土构件弯扭性能进行数值模拟分析,得到了构件的扭矩-转角关系曲线,分析了构件的破坏形态.研究了不同参数对锥形高强中空夹层薄壁钢管混凝土构件弯扭受力性能的影响.结果表明:弯扭比对构件刚度影响较小,但对构件的破坏形态影响较大.随着弯扭比增大,构件的抗扭承载力降低,抗弯承载力提高,抗扭延性降低,构件更早发生断裂.空心率、锥度、内外钢管径厚比对锥形高强中空夹层薄壁钢管混凝土弯扭构件的抗扭承载力影响较为显著,混凝土强度和内钢管强度对弯扭构件的抗扭承载力影响较小.

The finite element software ABAQUS was used to simulate the bending and torsional performance of tapered high-strength thin-walled concrete-filled double skin steel tubular(CFDST)members, of which inner and outer steel tubes and stiffeners were made of Q690 steel, and concrete was made of C120 high-strength concrete. The torsion-rotation angle curve was obtained, the failure pattern of the tapered high strength thin-walled CFDST member was analyzed, and the influence of hollow ratio, taper, diameter-to-thickness ratios of the outer and inner steel tube, strength of the concrete and the inner tube on the bending and torsional behaviour of the tapered high strength thin-walled CFDST members was studied. The results show that the effect of the ratio of moment to torsion on the stiffness of the member is minor, but has considerable effect on the failure pattern. With the increase of the ratio of moment to torsion, the ultimate torsional capacity and ductility of the members decrease, and the ultimate bending capacity increase. The hollow ratio, taper and the diameter-to-thickness ratio of the inner and outer steel tube have considerable effect on the ultimate torsional capacity, and the strength of concrete and the strength of inner steel tube have little effect on the torsional bearing capacity.

引言
1 有限元模型
2 受力机理分析
3 参数分析
4 结论

图1 中空夹层钢管混凝土构件示意图<br/>Fig.1 Schematic diagram of CFDST

图1 中空夹层钢管混凝土构件示意图
Fig.1 Schematic diagram of CFDST

表1 混凝土塑性参数<br/>Tab.1 Plastic coefficients of concrete

表1 混凝土塑性参数
Tab.1 Plastic coefficients of concrete

图2 弯扭构件有限元模型边界条件<br/>Fig.2 Finite element model boundary conditions for bending and torsional members

图2 弯扭构件有限元模型边界条件
Fig.2 Finite element model boundary conditions for bending and torsional members

表2 试件参数<br/>Tab.2 Parameters of specimen

表2 试件参数
Tab.2 Parameters of specimen

图3 有限元与试验扭矩-转角曲线对比<br/>Fig.3 Comparison of torsion-rotation angle curves between FEA and test

图3 有限元与试验扭矩-转角曲线对比
Fig.3 Comparison of torsion-rotation angle curves between FEA and test

图4 有限元与试验破坏形态对比<br/>Fig.4 Comparison of failure patterns between FEA and test

图4 有限元与试验破坏形态对比
Fig.4 Comparison of failure patterns between FEA and test

表3 弯扭构件参数<br/>Tab.3 Parameters of bending and torsional members

表3 弯扭构件参数
Tab.3 Parameters of bending and torsional members

图5 各构件破坏形态对比<br/>Fig.5 Comparison of failure patterns of each member

图5 各构件破坏形态对比
Fig.5 Comparison of failure patterns of each member

图6 弯扭构件扭矩-转角关系典型曲线<br/>Fig.6 Typical torsion-rotation angle relationship curve of the bending and torsional member

图6 弯扭构件扭矩-转角关系典型曲线
Fig.6 Typical torsion-rotation angle relationship curve of the bending and torsional member

图7 不同弯扭比时WN-1构件扭矩-转角曲线<br/>Fig.7 Torsion-rotation angle curves of WN-1 member for various ratios of bending to torsion

图7 不同弯扭比时WN-1构件扭矩-转角曲线
Fig.7 Torsion-rotation angle curves of WN-1 member for various ratios of bending to torsion

图8 Tu/Tmax-m关系曲线<br/>Fig.8 Tu/Tmax-m relationship curve

图8 Tu/Tmax-m关系曲线
Fig.8 Tu/Tmax-m relationship curve

图9 不同空心率构件的扭矩-转角曲线<br/>Fig.9 Torsion-rotation angle curves for various hollow ratio members

图9 不同空心率构件的扭矩-转角曲线
Fig.9 Torsion-rotation angle curves for various hollow ratio members

图10 外钢管与夹层混凝土相互作用历程曲线<br/>Fig.10 Curves of interaction between outer steel tube and sandwich concrete

图10 外钢管与夹层混凝土相互作用历程曲线
Fig.10 Curves of interaction between outer steel tube and sandwich concrete

图11 不同锥度构件的扭矩-转角曲线<br/>Fig.11 Torsion-rotation angle curves for various taper members

图11 不同锥度构件的扭矩-转角曲线
Fig.11 Torsion-rotation angle curves for various taper members

图12 外钢管与夹层混凝土相互作用历程曲线<br/>Fig.12 Curves of interaction between outer steel tube and sandwich concrete

图12 外钢管与夹层混凝土相互作用历程曲线
Fig.12 Curves of interaction between outer steel tube and sandwich concrete

图13 不同外钢管径厚比构件的扭矩-转角曲线<br/>Fig.13 Torsion-rotation angle curves of various diameter-to-thickness ratio of outer steel tube members

图13 不同外钢管径厚比构件的扭矩-转角曲线
Fig.13 Torsion-rotation angle curves of various diameter-to-thickness ratio of outer steel tube members

图14 外钢管与夹层混凝土相互作用历程曲线<br/>Fig.14 Curves of interaction between outer steel tube and sandwich concrete

图14 外钢管与夹层混凝土相互作用历程曲线
Fig.14 Curves of interaction between outer steel tube and sandwich concrete

图15 不同内钢管径厚比构件的扭矩-转角曲线<br/>Fig.15 Torsion-rotation angle curves of various diameter-to-thickness ratio of inner steel tube members

图15 不同内钢管径厚比构件的扭矩-转角曲线
Fig.15 Torsion-rotation angle curves of various diameter-to-thickness ratio of inner steel tube members

图16 外钢管与夹层混凝土相互作用历程曲线<br/>Fig.16 Curves of interaction between outer steel tube and sandwich concrete

图16 外钢管与夹层混凝土相互作用历程曲线
Fig.16 Curves of interaction between outer steel tube and sandwich concrete

图17 不同混凝土强度构件的扭矩-转角曲线<br/>Fig.17 Torsion-rotation angle curves of various concrete strength members

图17 不同混凝土强度构件的扭矩-转角曲线
Fig.17 Torsion-rotation angle curves of various concrete strength members

图18 外钢管与夹层混凝土相互作用历程曲线<br/>Fig.18 Curves of interaction between outer steel tube and sandwich concrete

图18 外钢管与夹层混凝土相互作用历程曲线
Fig.18 Curves of interaction between outer steel tube and sandwich concrete

图19 不同内钢管强度构件的扭矩-转角曲线<br/>Fig.19 Torsion-rotation angle curves of various inner tube strength members

图19 不同内钢管强度构件的扭矩-转角曲线
Fig.19 Torsion-rotation angle curves of various inner tube strength members

图20 外钢管与夹层混凝土相互作用历程曲线<br/>Fig.20 Curves of interaction between outer steel tube and sandwich concrete

图20 外钢管与夹层混凝土相互作用历程曲线
Fig.20 Curves of interaction between outer steel tube and sandwich concrete

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期刊信息

西安建筑科技大学学报(自然科学版)
（1957年创刊双月刊）

主管单位：陕西省教育厅

主办单位：西安建筑科技大学

主　　编：刘加平（院士）

副主编：史庆轩（常务）闫增峰

国内刊号：CN61-1295/TU

I S S N：1006-7930

地　　址：西安市雁塔路中段13号

国内发行：西安建筑科技大学学报编辑部

国外发行：中国出版对外贸易总公司

编辑出版：西安建筑科技大学学报编辑部

备注

引言

1 有限元模型

2 受力机理分析

3 参数分析

4 结论

期刊信息