当前位置: X-MOL 学术Front. Mater. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Numerical Simulation on Impact Test of CFRP Strengthened Reinforced Concrete Beams
Frontiers in Materials ( IF 3.2 ) Pub Date : 2020-07-13 , DOI: 10.3389/fmats.2020.00252
He Qingfeng , Li Jiang , Yue Leiyang , Mao Jiawei

As the main horizontal load-bearing member, the research on the impact resistance of reinforced concrete beams is an important part of the design of building structures against strong dynamic loads. Therefore, impact-resistant design is critical to the safety and maintainability of such structures. However, the impact performance of RC beams has not been well understood, and the methods of strengthening RC structures to resist impact loads are still very limited. In this study, experimental tests and numerical simulations were carried out to study the performance of RC beams with or without FRP reinforcement under impact loads. In order to study the dynamic performance of reinforced concrete beams before and after CFRP reinforcement under different impact conditions, the finite element analysis software ANSYS/LSDYNA was used to simulate the impact test of five ordinary RC beams and five strengthened beams. The impact speed and impact weight of the drop hammer are mainly changed during the simulation, and the stress distribution, crack development and failure morphology, and CFRP resistance contribution of the specimen were analyzed. The simulation results show that CFRP can alleviate the high stress in the impact transient concrete, reduce the deformation of the beam body, limit the crack development, and provide a certain impact resistance. The increase of the impact height has a more significant effect on the transient response of the component. CFRP can effectively restrain the deformation under different impact weight conditions. Therefore, strengthening RC beams with CFRP is an effective method to improve the impact load resistance.



中文翻译:

CFRP加固钢筋混凝土梁冲击试验的数值模拟。

作为水平承重的主要构件,钢筋混凝土梁的抗冲击性研究是建筑结构抗强动力荷载的重要组成部分。因此,抗冲击设计对于此类结构的安全性和可维护性至关重要。但是,RC梁的冲击性能尚未得到很好的理解,加强RC结构以抵抗冲击载荷的方法仍然非常有限。在这项研究中,进行了实验测试和数值模拟,以研究在有冲击载荷下有或没有FRP加固的RC梁的性能。为了研究不同冲击条件下CFRP加固前后钢筋混凝土梁的动力性能,用有限元分析软件ANSYS / LSDYNA模拟了五根普通RC梁和五根加固梁的冲击试验。模拟过程中主要改变了落锤的冲击速度和冲击重量,并分析了试样的应力分布,裂纹发展和破坏形态以及CFRP阻力贡献。仿真结果表明,CFRP可以缓解冲击瞬态混凝土中的高应力,减少梁体的变形,限制裂纹的发展,并提供一定的抗冲击性。冲击高度的增加对部件的瞬态响应具有更显着的影响。CFRP可以有效地抑制不同冲击重量条件下的变形。因此,

更新日期:2020-08-04
down
wechat
bug