吉林省二道白河玉带桥检测评估和加固研究
发布时间：2018-12-08 13:59
【摘要】：交通运输线路的重要组成部分,是连接道路运输间的纽带。随着我国交通运输工程的高速发展,不仅有着大量新桥需要进行修建,同时也有很多服役年限已久的桥梁需要进行养护加固和拆除重建。这些老桥大多数采用旧规范的设计荷载,标准较低,现在已有许多出现了问题和缺陷,如强度不足、耐久性和安全性过低等。因此,对桥梁进行病害检测评估并采取相应的加固措施,保证交通运输的需求,已经刻不容缓。服役年限已久的桥梁出现问题,一方面是由于自然环境如温度、湿度等使得桥梁结构发生老化,力学性能降低;另一方面是因为交通荷载的不断作用,使得桥梁的承载能力和耐久性不断下降。此类桥梁能否满足现有交通量的需求,是人们所关心的问题。通过对桥梁进行检测及评估,我们可以很好的判断结构的缺损及损伤程度,并用以估测其使用年限,也可进行桥梁的档案备份管理,收集相关资料来指导今后的使用、维护过程。针对检测评估后的桥梁,我们可以判断其受损程度,根据其剩余承载力来采取相应的措施,对其进行加固或是重建,从而确保人民生命财产的安全,避免出现桥梁垮塌等重大事故。对具有一定剩余承载力的桥梁,可对其进行加固处理,这样既经济合理又满足我国目前可持续发展的要求。本文以二道白河一座跨径为41m的斜腿刚构为工程依托,主要开展了以下几个方面的工作:1、对斜腿刚构桥这种特殊的桥梁形式的受力特点进行了分析,总结其静力特性和动力特性,考虑不同的斜腿倾角对其静力、动力特性的影响。根据实际情况,从几种常用的桥梁加固方法中,选定合适的斜腿刚构桥加固方法,阐述了其加固原则,对斜腿刚构桥的加固方法进行了探讨。2、对玉带桥进行外观和无损检测,收集桥梁基础数据,在此基础上通过建立有限元模型对桥梁受力状态进行分析,然后进行动静载试验,评价桥梁的承载能力。3、对比几种加固方法,根据实际情况对桥梁进行加固,通过ansys建立加固后的桥梁模型,通过静动载试验分析加固后桥梁的实际工作情况。对比加固前后桥梁静、动力参数,分析选定加固方法的实际加固效果。
[Abstract]:The important part of transportation line is the link between road transportation. With the rapid development of transportation engineering in our country, there are not only a large number of new bridges to be built, but also many bridges with long service years that need maintenance, reinforcement and demolition and reconstruction. Most of these old bridges adopt the design load of the old code, and the standard is low. Now there are many problems and defects, such as insufficient strength, low durability and low safety, etc. Therefore, it is urgent to evaluate the bridge diseases and take corresponding reinforcement measures to ensure the demand of transportation. On the one hand, because of the natural environment such as temperature, humidity and so on, the bridge structure is aging and the mechanical performance is reduced. On the other hand, because of the continuous action of traffic load, the bearing capacity and durability of the bridge are decreasing. Whether this kind of bridge can meet the demand of the current traffic volume is the concern of people. Through the detection and evaluation of the bridge, we can judge the defect and damage degree of the structure very well, estimate its service life, also can carry on the archives backup management of the bridge, collect the relevant information to guide the use in the future. Maintenance process. In view of the bridge after detection and evaluation, we can judge the degree of damage, take appropriate measures according to its residual bearing capacity, strengthen or rebuild it, so as to ensure the safety of people's life and property. Avoid major accidents such as bridge collapse. The bridge with certain residual bearing capacity can be strengthened and treated, which is economical and reasonable and meets the requirement of sustainable development in our country at present. Based on an oblique legged rigid frame with a span of 41 m in Erdaobai River, this paper mainly carried out the following work: 1. The stress characteristics of this special bridge form are analyzed. The static and dynamic characteristics are summarized and the influence of oblique leg inclination on its static and dynamic characteristics is considered. According to the actual situation, from several commonly used bridge strengthening methods, the appropriate reinforcement method of oblique legged rigid frame bridge is selected, its reinforcement principle is expounded, and the reinforcement method of inclined leg rigid frame bridge is discussed. The appearance and nondestructive testing of the jade belt bridge are carried out, and the basic data of the bridge are collected. On this basis, the stress state of the bridge is analyzed by establishing the finite element model, and then the dynamic and static load tests are carried out to evaluate the bearing capacity of the bridge. Compared with several reinforcement methods, the bridge is strengthened according to the actual situation. The model of the strengthened bridge is established by ansys, and the actual working situation of the strengthened bridge is analyzed by static and dynamic load test. The static and dynamic parameters of the bridge beam before and after reinforcement are compared, and the actual reinforcement effect of the selected reinforcement method is analyzed.
【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】：U446;U445.72
[Abstract]:The important part of transportation line is the link between road transportation. With the rapid development of transportation engineering in our country, there are not only a large number of new bridges to be built, but also many bridges with long service years that need maintenance, reinforcement and demolition and reconstruction. Most of these old bridges adopt the design load of the old code, and the standard is low. Now there are many problems and defects, such as insufficient strength, low durability and low safety, etc. Therefore, it is urgent to evaluate the bridge diseases and take corresponding reinforcement measures to ensure the demand of transportation. On the one hand, because of the natural environment such as temperature, humidity and so on, the bridge structure is aging and the mechanical performance is reduced. On the other hand, because of the continuous action of traffic load, the bearing capacity and durability of the bridge are decreasing. Whether this kind of bridge can meet the demand of the current traffic volume is the concern of people. Through the detection and evaluation of the bridge, we can judge the defect and damage degree of the structure very well, estimate its service life, also can carry on the archives backup management of the bridge, collect the relevant information to guide the use in the future. Maintenance process. In view of the bridge after detection and evaluation, we can judge the degree of damage, take appropriate measures according to its residual bearing capacity, strengthen or rebuild it, so as to ensure the safety of people's life and property. Avoid major accidents such as bridge collapse. The bridge with certain residual bearing capacity can be strengthened and treated, which is economical and reasonable and meets the requirement of sustainable development in our country at present. Based on an oblique legged rigid frame with a span of 41 m in Erdaobai River, this paper mainly carried out the following work: 1. The stress characteristics of this special bridge form are analyzed. The static and dynamic characteristics are summarized and the influence of oblique leg inclination on its static and dynamic characteristics is considered. According to the actual situation, from several commonly used bridge strengthening methods, the appropriate reinforcement method of oblique legged rigid frame bridge is selected, its reinforcement principle is expounded, and the reinforcement method of inclined leg rigid frame bridge is discussed. The appearance and nondestructive testing of the jade belt bridge are carried out, and the basic data of the bridge are collected. On this basis, the stress state of the bridge is analyzed by establishing the finite element model, and then the dynamic and static load tests are carried out to evaluate the bearing capacity of the bridge. Compared with several reinforcement methods, the bridge is strengthened according to the actual situation. The model of the strengthened bridge is established by ansys, and the actual working situation of the strengthened bridge is analyzed by static and dynamic load test. The static and dynamic parameters of the bridge beam before and after reinforcement are compared, and the actual reinforcement effect of the selected reinforcement method is analyzed.
【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】：U446;U445.72
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