横向体外预应力加固装配式空心板桥的探讨  

Strengthening assembly slab bridges by imposing transverse external pre-stress

作　　者：陈淮[1] 张云娜 葛素娟[1] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]深圳市综合交通设计研究院,广东深圳518131

出　　处：《铁道科学与工程学报》2008年第6期22-25,共4页Journal of Railway Science and Engineering

基　　金：河南省自然科学基金资助项目(072300440160)

摘　　要：采用数值仿真方法对影响装配式空心板桥加固效果的一些因素进行研究。利用有限元程序MIDAS/Civil建立装配式预应力混凝土空心板桥整体计算模型,探讨空心板桥纵向不同位置处施加横向体外预应力的加固效率以及桥梁宽跨比不同时的加固效果。计算结果表明:空心板桥在跨中处施加横向体外预应力的加固效果较两端位置明显;桥梁宽跨比越小,加固效率越高。所得结论对该加固方法在工程中的应用有参考价值。Several factors that influenced strengthening effect were studied by numerical simulation. Numerical model of an as sembly prestressed concrete slab bridge was built using software MIDAS/Civil. When external transverse pre - stressing force was imposed to reinforce the bridge, the difference of reinforcement efficiency at different longitudinal locations of the same slab was analyzed when bridge＇s ratio of width to span was different. The analytical results show that the reinforcement efficiency of location nearby mid - span is higher than that away from mid - span as for the same slab, and that the ratio of width to span decreases as the reinforcement efficiency increases. The analytical results of the text can supply significant references to the engineering application of this reinforcement method.

关 键 词：装配式空心板桥 加固 有限元法 横向体外预应力 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]