摘要
公路桥梁采用体外预应力技术进行加固时,在汽车荷载作用下,预应力筋和梁体有可能发生共振现象,使力筋内力增大甚至发生断裂。该文通过对体外力筋的振动问题建立力学模型进行研究,提出控制力筋振动的建议,供体外预应力加固桥梁工程设计时参考。
When the highway bridge is reinforced by the out-body prestressing technique,the prestressing reinforcement and the beam body maybe take place the phenomena of sympathetic vibration to make the inner force of pre-stressing reinforcement increase and the breaking at least.The article studies the mechanics model set up for the vibration problem of out-body pre-stressing reinforcement,and puts forward the suggestions for controlling the vibration of the pre-stressing reinforcement able to provide the reference for the design of the out-body pre-stressing reinforcing bridge works.
出处
《城市道桥与防洪》
2009年第7期79-81,共3页
Urban Roads Bridges & Flood Control
关键词
体外预应力
公路桥梁
加固
振动控制
out-body pre-stressing,highway bridge,reinforcing,vibration control
