摘要
对承载能力不满足要求的装配式混凝土T梁桥采用外部粘贴预应力碳纤维板进行加固,为得到加固后的装配式混凝土T梁桥的极限承载力,利用Midas有限元软件建立了外部粘贴预应力碳纤维板加固混凝土T梁桥空间有限元计算模型,进行了加固后装配式混凝土T梁桥极限承载力的全过程分析。研究结果表明:采用外部粘贴预应力碳纤维板对装配式混凝土T梁桥进行加固,可以充分发挥碳纤维板的高强特性,减小混凝土的应力,改善混凝土T梁的受力性能,延缓裂缝的产生;提高混凝土T梁的屈服荷载、极限荷载,使混凝土T梁的承载能力得到提高;增大T梁的刚度,使T梁的挠度明显减小,变形得到有效控制。
The prefabricated concrete T girder bridge which cannot meet the requirements of the load bearing capacity was reinforced by external bonded Prestressed carbon fiber board, In order to evaluate the ultimate bearing capacity of the strengthened T girder bridge, the finite element model of concrete T girder bridge strengthened by external bonded Prestressed carbon fiber board was established with the Midas finite element software, and analysis of the ultimate bearing capacity for the bridge was performed. The numerical result shows that： The stresses of steel stand and concrete can be reduced,the mechanical properties ofT girder can be improved, and the emergence of cracks can be delayed by the presented strengthening method because of full play of the T girder characteristics of external bonded Prestressed carbon fiber board; the increased yield and ultimate loads lead to improving the bearing capacity of the concrete T girder; due to the increase of the stiffness of T girder, the vertical deflection can be dramatically decreased and the deformation Can be effectively suppressed.
出处
《工程建设与设计》
2016年第12期75-77,共3页
Construction & Design for Engineering
关键词
桥梁工程
体外预应力碳纤维板
有限元法
极限承载力
bridge engineering
external bonded prestressed carbon fiber board
finite element method
ultimate beating capacity
