吉林省高速公路典型桥梁上部结构调研分析及加固方法研究
发布时间：2018-09-11 18:02
【摘要】：吉林省高速公路既有桥梁有许多存在缺陷或损伤,为了保证其正常安全使用,需要对其进行加固维修及改造等。然而,对桥梁进行加固维修的前提是先对既有桥梁有效准确的检查评估其现状,从而选择合适的加固方案,加固之后可对桥梁再次检测以判断其加固效果及使用能力。开展桥梁的检测及技术状况评定和加固效果分析是十分有意义的。本文以对吉林省境内长吉、长平、长营3条典型高速公路为工程依托,开展了以下研究工作:1、对长平、长吉、长营3条高速公路上桥梁结构的桥型分布和桥梁上部结构的病害进行实地调研、分析。以调研数据为基础,对桥梁上部结构的技术状况进行评定、统计。2、对体外预应力加固方法等6种常用的桥梁上部结构加固方法进行了比较分析,从而明确了这6种加固方法的基本原理、适用范围及优缺点。3、以长平高速13m预应力简支空心板桥为工程依托,首先分析了预应力钢束长度和预应力钢束的数量对桥梁上部结构承载能力的影响,依据分析结果确定了合理的预应力钢束长度、数量及施加方案。最后对加固后的桥梁结构进行整体和局部设计计算,以验证加固效果。4、以长平20m跨径简支小箱梁桥为工程依托,分析了加厚铺装层、加厚腹板以及加厚底板三种方案的加固效果。采用有限元方法,分别对铺装层加厚厚度、腹板加厚厚度以及底板加厚厚度进行优化分析,从理论分析了增大截面法对20m跨径简支小箱梁桥的加固效果。
[Abstract]:There are many defects or damages in the existing bridges in Jilin Province. In order to ensure their normal and safe use, it is necessary to strengthen, repair and rebuild them. However, the premise of strengthening and maintaining the bridge is to check and evaluate the current situation of the existing bridge effectively and accurately, so as to select the appropriate reinforcement scheme. After strengthening, the bridge can be tested again to judge its reinforcement effect and ability. It is very meaningful to carry out bridge detection, technical condition evaluation and reinforcement effect analysis. Based on the three typical expressways in Changji, Changping and Changying in Jilin Province, this paper has carried out the following research work: 1, Changping, Changji, The distribution of bridge structure and the disease of bridge superstructure on Changying 3 freeway were investigated and analyzed. Based on the investigation data, the technical status of the superstructure of the bridge is evaluated, and six common methods of strengthening the superstructure of the bridge, such as the external prestressing reinforcement method, are compared and analyzed. Thus, the basic principle, applicable scope, advantages and disadvantages of the six reinforcement methods are clarified. The engineering support is based on the prestressed simply supported hollow slab bridge of Changping high speed 13m. Firstly, the influence of the length of prestressed steel strands and the number of prestressed steel bundles on the bearing capacity of the superstructure of bridges is analyzed. Based on the analysis results, the reasonable length, quantity and application scheme of prestressed steel strands are determined. Finally, the whole and local design calculation of the strengthened bridge structure is carried out to verify the reinforcement effect .4. based on the Changping 20m span simply supported small box girder bridge, the thickened paving layer is analyzed. Strengthening effect of thickening web and thickening bottom plate. By using finite element method, the thickening of pavement, web and bottom are optimized, and the reinforcement effect of the method of increasing cross-section on 20m span simply supported small box girder bridge is analyzed theoretically.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.72
本文编号：2237445
[Abstract]:There are many defects or damages in the existing bridges in Jilin Province. In order to ensure their normal and safe use, it is necessary to strengthen, repair and rebuild them. However, the premise of strengthening and maintaining the bridge is to check and evaluate the current situation of the existing bridge effectively and accurately, so as to select the appropriate reinforcement scheme. After strengthening, the bridge can be tested again to judge its reinforcement effect and ability. It is very meaningful to carry out bridge detection, technical condition evaluation and reinforcement effect analysis. Based on the three typical expressways in Changji, Changping and Changying in Jilin Province, this paper has carried out the following research work: 1, Changping, Changji, The distribution of bridge structure and the disease of bridge superstructure on Changying 3 freeway were investigated and analyzed. Based on the investigation data, the technical status of the superstructure of the bridge is evaluated, and six common methods of strengthening the superstructure of the bridge, such as the external prestressing reinforcement method, are compared and analyzed. Thus, the basic principle, applicable scope, advantages and disadvantages of the six reinforcement methods are clarified. The engineering support is based on the prestressed simply supported hollow slab bridge of Changping high speed 13m. Firstly, the influence of the length of prestressed steel strands and the number of prestressed steel bundles on the bearing capacity of the superstructure of bridges is analyzed. Based on the analysis results, the reasonable length, quantity and application scheme of prestressed steel strands are determined. Finally, the whole and local design calculation of the strengthened bridge structure is carried out to verify the reinforcement effect .4. based on the Changping 20m span simply supported small box girder bridge, the thickened paving layer is analyzed. Strengthening effect of thickening web and thickening bottom plate. By using finite element method, the thickening of pavement, web and bottom are optimized, and the reinforcement effect of the method of increasing cross-section on 20m span simply supported small box girder bridge is analyzed theoretically.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.72
【参考文献】
相关期刊论文 前10条
1 李睿;朱德祥;李志中;刘兵;;基于病害检测的桥梁下部结构震害预测方法研究[J];工程抗震与加固改造;2014年01期
2 张开鹏,蒋玉龙,曾雪芳;桥梁加固的发展与展望[J];公路;2005年08期
3 肖玉辉,沈立宏;混凝土桥梁病害成因分析及对策研究[J];中外公路;2004年01期
4 徐栋,徐海军;预制节段体外预应力桥梁的耐久性评述[J];同济大学学报(自然科学版);2003年11期
5 王宗林,王彤,张树仁;体外预应力混凝土简支梁的极限强度分析[J];哈尔滨建筑大学学报;2001年01期
6 周履;桥梁耐久性发展的历史与现状[J];桥梁建设;2000年04期
7 牛斌;体外预应力混凝土梁极限状态分析[J];土木工程学报;2000年03期
8 李荣,胡孔国;碳纤维片材加固钢筋混凝土受弯构件计算方法的探讨[J];特种结构;2000年02期
9 张建平,卢汝绥;预应力钢筋混凝土T形梁的施工质量控制[J];铁道建筑;1998年12期
10 单成林;无粘结部分预应力混凝土连续梁桥的配筋与极限强度验算[J];东北公路;1995年01期
，本文编号：2237445
本文链接：https://www.wllwen.com/kejilunwen/daoluqiaoliang/2237445.html
