PC连续梁桥竖向预应力损失的数值分析  

Numerical Analysis on Vertical Prestress Loss of PC Continuous Prestressed Girder Bridge

作　　者：吕强[1] 舒富民[2] 黄检[3] 

机构地区：[1]湖南省路桥建设集团公司,湖南长沙410004 [2]东南大学交通学院,江苏南京210096 [3]重庆交通大学土木建筑学院,重庆400074

出　　处：《西部交通科技》2008年第2期50-52,共3页Western China Communications Science & Technology

摘　　要：文章通过对实桥进行数值仿真模拟,研究发现竖向预应力不足或损失过大是造成腹板斜裂缝的主要原因。得出腹板渐变在相邻3个节段完成,能大大减少主拉应力损失,从而在一定程度上缓解主拉应力值突变的结论。Through the numerical simulation of the actual bridge,the study in the Paper shows that the inadequacy or excessive loss of vertical prestress is the main cause of diagonal crack on the web.It is concluded in the Paper that if the webs' transition stops in the adjacent three segments,it will greatly decrease the principal tensile stress loss and in certain extend minimize the mutation of principal tensile stress.

关 键 词：腹板裂缝 竖向预应力损失 数值分析 

分 类 号：U448[建筑科学—桥梁与隧道工程]