预应力齿板锚固区拉压杆模型及配筋设计  

Strut-and-tie Models and Reinforcement Design for Prestressed Anchorage Plates

作　　者：林波[1] 刘钊[1] 

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096

出　　处：《公路交通科技》2011年第6期91-96,共6页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(50778038);教育部博士点基金项目(20070286097)

摘　　要：首先通过分析齿板锚固区的应力分布规律,揭示了引起齿板锚固区拉应力集中的5种典型局部作用效应。根据主应力迹线指示的力流传递路径以及局部区域的力流平衡关系,提出了齿板锚固区拉压杆模型的基本构形,在此基础上,进一步研究了定量化几何构形的确定方法和依据。以所提出的拉压杆模型为基础,结合AASHTO规范,给出了预应力齿板锚固区的配筋设计方法,设计示例表明该方法具有良好的实用性,可供工程设计参考。Through stress distribution analysis for an anchorage plate,five typical local action effects which lead to tensile stress concentration were revealed.Based on the load paths indicated by principal stress trajectories and the balance relationship among force flows,the basic configuration of strut-and-tie model for anchorage plate was proposed.In addition,further study on the approach and the basis for determining the quantitative geometric configuration was carried out.By the proposed method and as per relevant provisions of AASHTO LRFD（2007）,the reinforcement design of anchorage plates was accomplished.A worked design example demonstrates that the method has good practicality.

关 键 词：桥梁工程 配筋设计 拉压杆模型 齿板锚固区 有限元分析 

分 类 号：U448.35[建筑科学—桥梁与隧道工程]