自释放预顶力弹性支撑结构的疲劳问题研究  

The Fatigue Study of Self-Released Prestressed Elastic Support Structures

作　　者：贺倞[1] 周建庭[1] 袁瑞[1] 潘东宏[1] 

机构地区：[1]重庆交通大学,重庆400074

出　　处：《工程建设与设计》2010年第5期121-125,共5页Construction & Design for Engineering

基　　金：国家自然科学基金项目(50608072;50878219);教育部新世纪优秀人才计划;重庆市杰青项目(CSTC;2008BA6038)

摘　　要：介绍了一种用于桥梁加固的自释放预顶力弹性支撑结构,分析了它在疲劳破损作用下的影响和在高周疲劳下的特性。结合依托工程,从断裂力学的角度计算出了支撑结构的保守使用寿命。这种结构制作简单,使用效果好,对增设支撑加固桥梁这种新型加固方法的推广应用乃至对丰富整个桥梁加固领域有着积极重要的作用。This paper introduce the self-released prestressed elastic support structure used in bridge reinforcement, and analyzed both its influence under the effect of fatigue damage and its characteristics on condition ofgigacycle fatigue. Also calculated that this kind of support structure can be used for not less than 24 years from the perspective of fracture mechanics. The structure has a very important role in the popularization and application of the new method of bridge reinforcement by adding support to strengthen bridges, moreover, it also play a positive role for the improvement of bridge reinforcement field.

关 键 词：弹性支撑结构 疲劳破损 高周疲劳 疲劳寿命 

分 类 号：U441.4[建筑科学—桥梁与隧道工程]