CFRP加固承载状态下含腐蚀圆钢管混凝土轴压短柱力学性能研究  

Mechanical Properties of CFRP-Strengthened Concrete-Filled Circular Steel Tubular Stubs with Corrosion Under Initial Axial Loading

作　　者：毕欣 邵永波[1] 熊川楠 欧佳灵 BI Xin;SHAO Yongbo;XIONG Chuannan;OU Jialing(School of Civil Engineering and Geomatics,Southwest Petroleum University,Chengdu 610500,China;College of Architecture&Environment,Sichuan University,Chengdu 610065,China;School of Mechanical Engineering,Southwest Petroleum University,Chengdu 610500,China)

机构地区：[1]西南石油大学土木工程与测绘学院,成都610500 [2]四川大学建筑与环境学院,成都610065 [3]西南石油大学机电工程学院,成都610500

出　　处：《建筑钢结构进展》2022年第12期55-65,共11页Progress in Steel Building Structures

基　　金：国家自然科学基金(52078441);四川省青年科技创新研究团队项目(2019JDTD0017)。

摘　　要：利用有限元模型对碳纤维增强聚合物(carbon fiber reinforced polymer,CFRP)加固承载状态下含腐蚀圆钢管混凝土轴压短柱力学性能进行了研究。介绍了利用有限元实现轴压条件下CFRP加固承载状态下含腐蚀圆钢管混凝土短柱的建模方法。随后分别与两项试验结果进行对比,验证了有限元模型的准确性。基于验证后的有限元模型对CFRP加固承载状态下含腐蚀的圆钢管混凝土轴压短柱力学性能进行了参数分析。参数包括初始承载率、腐蚀角度、腐蚀深度、腐蚀长度以及CFRP层数。研究发现:CFRP能够提高钢管中部横截面屈服时构件的荷载,并且对极限承载力有明显提升;初始承载率的增大会导致在钢管中部横截面屈服时构件轴向荷载的降低,但对极限承载力并无显著影响。A finite element(FE)model is used to study the mechanical behavior of CFRP-strengthened concrete-filled circular steel tubular stubs with corrosion under initial axial loading. The modelling method of CFRP-strengthened concretefilled circular steel tubular stubs with corrosion under initial axial loading state is introduced. By comparing two series of test results,the accuracy of the calculation results of the FE model is verified. Using the proposed FE models,parametric analyses are conducted to determine the effect of key parameters on the compressive performance of these composite structures. The investigated parameters are the initial loading rate,corrosion angle,corrosion depth,corrosion length and the number of CFRP layers. The results of the parametric analysis reveal that when the mid-height cross-section of the steel tube yields,the axial load of the composite members can be increased by using CFRP,and the ultimate carrying capacity of the composite members can also be improved by using CFRP. In addition,when the mid-height cross-section of the steel tube yields,the increased initial loading rate will reduce the axial load carried by the composite members. However,the initial loading rate has no effect on the ultimate carrying capacity of composite members.

关 键 词：圆钢管混凝土短柱 碳纤维增强聚合物 初始承载 腐蚀 有限元分析 

分 类 号：TU398[建筑科学—结构工程]