圆截面CFRP-钢管混凝土在弯-扭荷载作用下的性能  

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

作　　者：王庆利 彭宽 邵永波[3] WANG Qingli;PENG Kuan;SHAO Yongbo(School of Civil Engineering,University of Science and Technology Liaoning,Anshan 114051,China;School of Mechatronic Engineering,Southwest Petroleum University,Chengdu 610500,China;School of Civil Engineering and Geomatics,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[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

出　　处：《复合材料学报》2022年第11期5557-5573,共17页Acta Materiae Compositae Sinica

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

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。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 characteristics of torque-rotation angle(T-θ)curve and shear stress-strain(τ-γ)curve were studied.Following the experimental study,the T-θcurve 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.

关 键 词：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 

分 类 号：TU398[建筑科学—结构工程]