钢板—混凝土组合加固方法在混凝土连续箱梁桥的应用研究

发布时间：2018-04-10 16:11

本文选题：桥梁工程 + 混凝土连续箱梁桥　；参考：《长安大学》2014年硕士论文

【摘要】：作为一种新型加固方法，钢板-混凝土组合加固方法能充分发挥钢板抗拉强度好，混凝土抗压性能好的优势，并能显著提高结构承载力，其发展前景广阔。本文针对国内外研究现状，并结合依托工程，较系统的分析了钢板-混凝土组合加固技术的施工技术与材料特性，采用荷载试验与有限元仿真相结合的方法分析了依托工程加固前、后的结构性能，运用力学指标对加固后性能做了定量评价。主要结论如下：（1）对组合加固方法所需加固材料以及详细施工工序等工艺进行了详细分析。（2）结合有限元仿真分析以及桥梁荷载试验，对依托工程加固前的结构性能进行评定。结果表明结构挠度和应变校验系数较大，，桥梁病害数量及病害程度发展较快，结构部分控制截面承载能力下降较大，不能满足设计要求，亟待加固。（3）采用钢板-混凝土组合加固方法对依托工程进行加固后，实测应变值较加固前明显减小，且在同一截面上分布更加均匀，结构刚度增加非常明显。加固后桥梁受力改善明显，且次边跨提升效果与边跨相比较优。
[Abstract]:In this paper, the construction technology and material characteristics of steel plate and concrete composite reinforcement technology are systematically analyzed in accordance with the current research situation at home and abroad, and combined with supporting engineering.The structural performance before and after reinforcement is analyzed by means of load test and finite element simulation, and the performance is evaluated quantitatively by means of mechanical index.The main conclusions are as follows:1) the strengthening materials and the detailed construction process are analyzed in detail.Combined with finite element simulation analysis and bridge load test, the structural performance before reinforcement is evaluated.The results show that the deflection and strain check coefficient of the structure is large, the number of bridge diseases and the degree of disease develop rapidly, and the bearing capacity of the control section of the structure decreases greatly, which can not meet the design requirements and is in urgent need of reinforcement.3) after strengthening the supporting project with steel plate and concrete composite method, the measured strain value is obviously reduced, and the distribution is more uniform on the same section, and the increase of structural stiffness is very obvious.After reinforcement, the stress of the bridge is improved obviously, and the effect of secondary span lifting is better than that of side span.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U445.72

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