简支空心板梁桥横向预应力加固方法及效果研究  

Study on the Method and Results of Simply Supported Hollow Plate Girder Bridge Reinforcement Applied Transverse Prestressing

作　　者：李莎[1] 戎贤[1] 李鹏飞[1] 

机构地区：[1]河北工业大学土木工程学院河北省土木工程技术研究中心,天津300401

出　　处：《郑州大学学报（工学版）》2015年第5期73-77,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：天津市自然科学基金资助项目(12JCYBJC1410);河北省交通运输厅科技计划资助项目(Y-2012041)

摘　　要：为解决空心板梁桥单板受力问题,基于邢汾高速某简支空心板梁桥设计相似有机玻璃试验模型.分析了预应力筋的布置以及荷载的施加等几个因素对横向预应力筋加固简支空心板梁桥效果的影响,从图形和量化计算两个方面,直观地给出了模型的加固方案对比.试验结果表明:施加横向预应力筋加固效果明显,在梁底跨中部位施加预应力加固效果最好;张拉预应力大小并非越大越好,应与施加荷载大小相适应,才能达到最佳加固效果.In order to solve the problem of single plunk strength, the similarly experimental model in organic glass based on a simply supported slab bridge of Xing Fen motorway is designed. The effect of the prestressing tendon layout and the applied load on transverse prestressed reinforcement of simply supported slab bridge is analyzed. The comparison of reinforeement program is given with the graphs and theoretical calculations. At the same time, the experimental results show that the reinforcement effect of transverse prestressing tendon is obvious. It is best when the transverse prestressing tendon is rationally used across the bottom of the beam ; on the other side , the load position also impacts on the reinforcement effect to some extent. It is incorrect to thimle that the bigger prestressed size , the better reinforcement effect. It should be in line with the applied load so that the best effect of reinforcement can be achieved.

关 键 词：简支空心板桥 单板受力 横向预应力 横向分布系数 有限元法 

分 类 号：U448.217[建筑科学—桥梁与隧道工程]