摘要
针对使用钢套箍加固桥墩结构的极限荷载及加固后偏心承载对桥墩的受力影响,基于Abaqus将混凝土塑性损伤模型、Embedded等技术引入到非线性数值分析中,实现不同工况下桥墩、套箍受力情况模拟。通过数值分析对比得出,正常使用时各构件应力水平值都在弹性范围内。顶升不同步时,桥墩承载能力仅为同步加载的32.5%。本文通过优化设计,使套箍承载能力提升了64.9%。本文数值分析方法为今后套箍加固混凝土桥墩结构研究提供依据。
The paper aims at analysis of steel hoop to reinforce RC bridge columns and the effect of eccentric compression on RC bridge columns. The paper introduces technologies like Concrete Plastic Damage Model, Embedded and so on into nonlinear numerical analysis, realizes the simulation of some key mechanical properties under different conditions. Concluded from comparison results of numerical simulations, the stress level of each member is in the elastic range when the bridge is in normal use. If the Jacking system can not work in coordination, the ultimate bearing capacity of the BC bridge column is only 32. 5% of synchronous lifting condition. Through optimization design, the bearing capacity of the steel hoop improved 64.9%. The numerical analysis method used by the paper can provide basis for further researches on steel hoop to reinforce RC bridge columns.
出处
《四川建材》
2016年第8期138-140,共3页
Sichuan Building Materials
关键词
钢套箍
混凝土
塑性损伤模型
极限荷载
应力
steel hoop
concrete
plastic damage model
ultimate bearing capacity
stress
