空心板桥横向预应力加固分析  

Hollow Slab Transverse Prestressing Reinforcement Analysis

作　　者：刘平[1] 李鹏飞[1] 李莎[1] 

机构地区：[1]河北工业大学土木工程学院,天津300401

出　　处：《郑州大学学报（工学版）》2014年第4期24-28,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：天津市自然科学基金资助项目(12JCYBJC14100);河北省交通运输厅科技计划资助项目(Y-2012041)

摘　　要：针对装配式简支空心板桥常见的病害,如:横向联系不足造成空心板挠度增大、单板受力等问题,运用有限元软件对于空心板桥进行模拟研究,施加体外预应力钢筋对其进行加固.通过对比分析装配式空心板桥施加横向预应力前后的结构位移的变化,从理论上对加固效果进行分析,并探讨所设置的横向预应力大小对于提高桥梁整体性的影响.研究发现:采用梁底施加横向预应力钢筋加固对于装配式空心板桥而言,能够有效的改善荷载横向分布,增加空心板结构横向连接,从而减少单板受力现象发生.In view of the simply supported hollow slab common diseases, such as horizontal contact due to the lack of hollow slab deflection increases, single plate bearing and other problems, with the finite element software,a simulation study was carried out for the hollow slab bridge, external prestressing steel reinforcement of the. Change of displacement of structure before and after applying transversely prestressing assembly type hol- low slab bridge through comparison and analysis, to analyze the effect of reinforcement theory, and discusses the transversely prestress can improve the whole bridge. The beam bottom transversely prestressed reinforcement for assembly type hollow slab is verified, transversely load distribution can improve effectively, increase the hol- low plate structure of transversely connection, thereby reducing the phenomenon of stress of single board.

关 键 词：桥梁工程 装配式空心板 体外加固 有限元 体外预应力 

分 类 号：U445.7[建筑科学—桥梁与隧道工程]