圆截面CFRP-钢管混凝土在弯-扭荷载作用下的性能

王庆利; 彭宽; 邵永波

doi:10.13801/j.cnki.fhclxb.20220301.002

圆截面CFRP-钢管混凝土在弯-扭荷载作用下的性能

doi: 10.13801/j.cnki.fhclxb.20220301.002

1.
辽宁科技大学　土木工程学院，鞍山 114051
2.
西南石油大学　机电工程学院，成都 610500
3.
西南石油大学　土木工程与测绘学院，成都 610500

基金项目: 辽宁省兴辽英才计划(XLYC1902009)；四川省青年科技创新研究团队(2019JDTD0017)

详细信息

通讯作者:
邵永波，博士，教授，研究方向为钢-混凝土组合及海洋工程结构　E-mail：ybshao@swpu.edu.cn

中图分类号: TU398
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- 被引次数: 0
出版历程
- 收稿日期: 2021-12-13
- 修回日期: 2022-01-30
- 录用日期: 2022-02-16
- 网络出版日期: 2022-03-05
- 刊出日期: 2022-11-01

Behavior of circular section concrete filled CFRP steel tubular under bending-torsion load

1.
School of Civil Engineering, University of Science and Technology Liaoning, Anshan 114051, China
2.
School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China
3.
School of Civil Engineering and Geomatics, Southwest Petroleum University, Chengdu 610500, China

摘要

摘要: 为了研究圆截面碳纤维增强聚合物(CFRP)-钢管混凝土的弯-扭性能，设计了9个试件进行弯-扭静力性能试验。设计试验对试件的扭矩-转角(T-θ)曲线、剪应力-剪应变(τ-γ)曲线的特点进行了研究。采用ABAQUS模拟了试件的T-θ曲线和变形模态，并与试验结果进行对比。结果表明：模拟与试验结果吻合较好，所提出的模拟方法能够合理、准确地预测圆截面CFRP-钢管混凝土(CFRP-ST/C)的弯扭性能。同时通过参数分析对CFRP层数、材料强度、弯矩比和含钢率等参数对构件弯-扭性能的影响进行研究。最后，以试验与有限元结果为基础，提出了CFRP-ST/C的弯-扭承载力的计算表达式，通过计算可知，构件抗扭承载力计算结果/抗扭承载力试验结果(T_ft^c/T_ft^t)的平均值为0.998，均方差为0.038；构件抗扭承载力计算结果/抗扭承载力有限元结果(T_ft^c/T_ft^f)的平均值为0.973，均方差为0.051。
- 圆CFRP-钢管混凝土 /
- 弯扭静力性能 /
- 承载力 /
- 试验研究 /
- 有限元分析
Abstract: To study circular section concrete filled carbon fiber reinforced polymer (CFRP)-steel tube (CFRP-ST/C) under bending-torsion load, 9 specimens were designed for static test under bending-torsion load. The characteris-tics of torque-rotation angle (T-θ) curve and shear stress-strain (τ-γ) curve were studied. Following the experimental study, the T-θ curve and deformation mode of the specimen were simulated by ABAQUS and compared with the test results. The good consistence between numerical results and experimental ones reveals that the proposed simulation method can predict the behavior of CFRP-ST/C reasonably and accurately under bending-torsion load. In addition, the influence of layers of CFRP, material strength, bending ratio and steel ratio on the static behavior of CFRP-ST/C specimens under bending-torsion load were then studied through numerical parametric study. Finally, equations for predicting the bearing capacity of CFRP-ST/C were proposed. The average value of calculation results for torsional bearing capacity of members/test results of torsional bearing capacity of members (T_ft^c/T_ft^t) is 0.998, and the mean square error is 0.038. The average value of calculation results of torsional bearing capacity of members/finite element results of torsional bearing capacity of members (T_ft^c/T_ft^f) is 0.973, and the mean square error is 0.051.
- circular CFRP concrete filled steel tubular /
- flexural torsional static performance /
- bearing capacity /
- experimental study /
- finite element analysis

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图 1 CFRP-钢管混凝土试件

Figure 1. Concrete filled CFRP steel tube specimen

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图 2 CFRP-钢管混凝土试件弯-扭静力加载设备图

Figure 2. Loading equipment diagram of concrete filled CFRP steel tube specimen under bending-torsion load

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图 3 CFRP-钢管混凝土弯-扭性能试件应变花布置示意图

Figure 3. Schematic diagram of strain rosette arrangement of CFRP concrete filled steel tubular flexural torsional performance specimen

D—Diameter of middle section of specimen

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图 4 圆截面CFRP-钢管混凝土试件的破坏形貌

Figure 4. Failure mode of circular concrete filled CFRP steel tube specimens

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图 5 圆截面CFRP-钢管混凝土试件钢管的破坏

Figure 5. Failure mode of steel tube of circular concrete filled CFRP steel tube specimens

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图 6 圆截面CFRP-钢管混凝土试件混凝土的破坏形貌

Figure 6. Failure mode of concrete of circular concrete filled CFRP steel tube specimen

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图 7 圆截面CFRP-钢管混凝土弯-扭性能试件的扭矩-转角(T-θ)曲线

Figure 7. Torque-angle (T-θ) curves of circular concrete filled CFRP steel tubular specimens under bending-torsion load

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图 8 圆截面CFRP-钢管混凝土弯-扭性能试件的剪应力-剪应变(τ-γ)曲线

Figure 8. Shear stress-shear strain (τ-γ) curves of circular concrete filled CFRP steel tubular specimens under bending-torsion load

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图 9 圆截面CFRP-钢管混凝土弯-扭性能构件有限元(FE)模拟的边界条件

Figure 9. Boundary conditions of finite element (FE) simulation for circular concrete filled CFRP steel tube member

P—Lateral loading; θ—Torsion angle

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图 10 圆截面CFRP-钢管混凝土弯-扭试件的T-θ曲线模拟结果与试验结果的比较

Figure 10. Comparison of T-θ curves simulation results and test results of circular concrete filled CFRP steel tube specimens under bending-torsion load

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图 12 圆截面CFRP-钢管混凝土弯-扭试件试验与有限元破坏模态对比

Figure 12. Comparison of failure mode simulation results and test results of circular concrete filled CFRP steel tube specimens under bending-torsion load

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图 11 圆截面CFRP-钢管混凝土弯-扭试件的τ-γ曲线模拟结果与试验结果比较

Figure 11. Comparison of τ-γ curves simulation results and test results of circular concrete filled CFRP steel tube specimens under bending-torsion load

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图 13 CFRP-钢管混凝土弯-扭构件典型的T-θ曲线

Figure 13. Typical T-θ curve of concrete filled CFRP steel tube member under bending-torsion load

Point O—after the bending moment is applied and before the torque is applied; Point A—Concrete cracking point; Point B—Steel reaching the yield strength; Point C—Transverse CFRP fracture; Point D—When the specimen reaches the angle of 15°; Point E—Longitudinal CFRP fracture

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图 14 圆截面CFRP-钢管混凝土弯-扭性能构件混凝土的纵向应力分布

Figure 14. Longitudinal stress distribution of concrete in circular concrete filled CFRP steel tube member under bending-torsion load

S33—Longitudinal concrete stress

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图 15 圆截面CFRP-钢管混凝土弯-扭性能构件钢管的Mises应力分布

Figure 15. Mises stress distribution of steel tube in circular concrete filled CFRP steel tube member under bending-torsion load

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图 16 圆截面CFRP-钢管混凝土弯-扭性能构件横向CFRP的应力分布

Figure 16. Transverse direction stress distribution of CFRP in circular concrete filled CFRP steel tube member under bending-torsion load

S11—Transverse stress direction of CFRP

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图 17 圆截面CFRP-钢管混凝土弯-扭性能构件纵向CFRP的应力分布

Figure 17. Longitudinal direction stress distribution of CFRP in circular concrete filled CFRP steel tube member under bending-torsion load

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图 18 m_l(a) 和m_t(b) 对圆截面CFRP-钢管混凝土弯-扭构件T-θ曲线的影响

Figure 18. Effect of m_l (a) and m_t(b) on T-θ curves of CFRP in circular concrete filled CFRP steel tube member under bending-torsion load

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图 19 钢管屈服强度f_y (a) 和混凝土强度 f_cu(b) 对圆截面CFRP-钢管混凝土弯-扭构件T-θ曲线的影响

Figure 19. Effect of steel yield strength f_y (a) and concrete strength f_cu (b) on T-θ curve for CFRP in circular concrete filled CFRP steel tube member under bending-torsion load

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图 20 弯矩比m对圆截面CFRP-钢管混凝土弯-扭构件T-θ曲线的影响

Figure 20. Effect of moment ratio m on T-θ curve for CFRP in circular concrete filled CFRP steel tube member under bending-torsion load

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图 21 含钢率 α对圆截面CFRP-钢管混凝土弯-扭构件T-θ曲线的影响

Figure 21. Effect of steel ratio α on T-θ curve for CFRP in circular concrete filled CFRP steel tube member under bending-torsion load

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图 22 圆截面CFRP-钢管混凝土构件典型的弯-扭试件抗弯承载力/抗弯承载力-抗扭承载力/抗扭承载力(M_ft/M_u-T_ft/T_u)曲线

Figure 22. Typical flexural capacity under bending-torsion load/flexural capacity-torsional bearing capacity under bending-torsion load/torsional bearing capacity (M_ft/M_u-T_ft/T_u)curve of circular concrete filled CFRP steel tube member

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图 23 圆截面CFRP-钢管混凝土弯-扭性能构件验证结果比较

Figure 23. Comparison of verification results of circular concrete filled CFRP steel tube member under bending-torsion load

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表 1 圆截面碳纤维增强聚合物(CFRP)-钢管混凝土试件的参数

Table 1. Parameters of circular concrete filled carbon fiber reinforced polymer (CFRP) steel tube specimens

Number	Specimens	m	m_l/layer	m_t/layer	ξ_cf	ξ	η_cf
1	11CFRP-ST/C1	0.1	1	1	0.15	1.12	0.16
2	11CFRP-ST/C2	0.2	1	1	0.15	1.12	0.16
3	11CFRP-ST/C3	0.3	1	1	0.15	1.12	0.16
4	12CFRP-ST/C1	0.1	1	2	0.31	1.28	0.16
5	12CFRP-ST/C2	0.2	1	2	0.31	1.28	0.16
6	12CFRP-ST/C3	0.3	1	2	0.31	1.28	0.16
7	13CFRP-ST/C2	0.2	1	3	0.46	1.43	0.16
8	01CFRP-ST/C2	0.2	0	1	0.15	1.12	0.00
9	21CFRP-ST/C2	0.2	2	1	0.15	1.12	0.32
Notes: m—Moment ratio; m₁—Number of longitudinal CFRP layers; m_t—Number of transverse CFRP layers; ξ_cf—Confinement factor of transverse CFRP; ξ—Confinement factor of transverse CFRP and steel tube; η_cf—Strengthening factor of longitudinal CFRP.

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