连续宽箱梁桥活载正应力增大系数研究  

A Study on Amplificatory Coefficient of Normal Stress of Continuous Wide-flange Box Girder Bridge under Live Load

作　　者：李旭[1] 林晶[1] 虞建成[1] 

机构地区：[1]东南大学交通学院,江苏南京210096

出　　处：《苏州科技学院学报（工程技术版）》2010年第4期35-39,共5页Journal of Suzhou University of Science and Technology （Engineering and Technology）

摘　　要：针对连续箱梁桥设计过程中活载正应力增大系数已有计算方法的不足,以某混凝土连续宽箱梁桥为背景,建立实体单元空间有限元计算模型,将全桥关键截面各个位置点的正应力增大系数计算值与已有方法所得值进行对比,探讨已有方法的可行性,以供同类工程设计参考。In view of the drawbacks of the previous computations in the amplificatory coefficient of the normal stress under the live load in the design of the continuous box girder bridges,based on a certain concrete continuous wide-flange box girder bridge,the substantial unit space finite element computation model was established.This paper compares the amplificatory coefficient calculated value of the normal stress in each point of the key sections of the bridge with the values by the previous methods,and discusses the feasibility of the previous methods,which will offer a reference for the similar project design.

关 键 词：宽箱梁 活载正应力增大系数 空间有限元 已有方法 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]