大跨度PC桥竖向预应力设计探讨  

Research on the Vertical Prestress Design of Long-span PC Continue Beam Bridge

作　　者：张开银[1] 刘利军[2] 廖原[2] 

机构地区：[1]华中科技大学,湖北武汉430074 [2]武汉理工大学,湖北武汉430063

出　　处：《公路交通科技》2004年第8期45-48,共4页Journal of Highway and Transportation Research and Development

基　　金：湖北省自然科学基金(2001ABB084);湖北省交通科技项目资助(鄂交科教[2002]466号)

摘　　要：介绍了一种在复杂应力状态下的混凝土强度双剪三参数准则模式,结合预应力混凝土梁斜截面抗剪强度研究,分析预应力混凝土在双轴应力状态下强度问题,提出考虑混凝土强度提高的竖向预应力计算公式。This paper introduces a concrete strength criterion in the state of complicated stress, namely a pattern of double-shear strength criterion with three parameters. Combining the study of the bevel sections anti-shear strength of pre-stressed concrete beam, the problems how to enhance the strength of the concrete in the state of double-axis stress is analyzed, and brings forward the vertical pre-stressed calculation formula in consideration of enhancing concrete strength.

关 键 词：混凝土强度准则 预应力混凝土梁 双轴应力 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]