板-拱组合作用加固简支板结构研究  

Study on the Strengthening of Simply Supported Slab Bridge Based on Plate-arch Composite Action

作　　者：程绍俊 高荣雄[2,3] 周文玮[2] 程双希 Duraid Hasan 

机构地区：[1]安阳市公路管理局,河南安阳455000 [2]华中科技大学上木工程与力学学院,湖北武汉430074 [3]华中科技大学控制结构湖北省重点实验室,湖北武汉430074

出　　处：《工程抗震与加固改造》2015年第3期66-72,共7页Earthquake Resistant Engineering and Retrofitting

摘　　要：早期修建的中小跨度简支板桥数量庞大,且大多面临加固改造。由于板式桥梁上部结构自身刚度低,加固难度较大。本文基于一座三跨简支板桥的加固提载工程实践,在理论分析的基础上,提出在板底增设拱肋和横向联系构件,并将新增拱肋与上部板在跨中段连接在一起的板-拱组合加固方法。通过加固前后的数值分析和静载试验对比,表明采用本文提出的方法可以大幅度提高结构刚度和承载力。板-拱组合方式对中小跨度的板式结构加固具有借鉴意义。There are considerable bridges with small and medium spans, which were constructed in early age, and most of them are faced to be strengthened and retrofitted. For the lower stiffness of the upper structure of slab bridges, it＇ s difficult to be reinforced. Based on a strengthening and increasing bearing capacity engineering practical project of the simply supported slab bridge with three spans and theoretical analysis, the plate-arch composite strengthening method, which arch ribs and transverse connection components are added under plates, and connected together with the plates in mid-span is put forward. Comparing the numerical analysis and static test results of structures before and after the reinforcement, it shows that the method can improve the stiffness of the structure as well as the bearing capacity. The plate-arch composite strengthening method may provide a reference for bridges with small and medium spans.

关 键 词：板-拱组合作用 简支板 加固 刚度 承载力 

分 类 号：U445.72[建筑科学—桥梁与隧道工程]