公路桥梁原位静载试验影响因素分析

发布时间：2018-03-30 02:17

  本文选题：公路桥梁　切入点：静载试验　出处：《大连海事大学》2014年硕士论文

【摘要】：目前,我国已经建成各种形式的公路桥梁60多万座,在运营过程中,一些桥梁由于交通量、荷载、环境作用与自然老化等原因,已经不能满足当前通行荷载的要求,需要通过荷载试验来判定其承载能力和使用性能(特别是对于原始资料不全的既有桥梁),并据此确定桥梁限载方案或加固改造方案。此外,荷载试验还可以检验新建大型桥梁结构的设计和施工质量,为交竣工质量鉴定提供准确依据。但是,由于技术资料的缺乏、理论分析假设、试验仪器设备性能、检测人员素质及试验环境等多种因素的影响,目前实际桥梁荷载试验往往得不到满意的结果。当前,我国现行的有关公路桥梁承载能力检测评定标准主要有《公路桥梁承载能力检测评定规程》(JTG/TJ21-2011)及《大跨径混凝土桥梁荷载试验的方法(1982版)》,前者对静载试验的介绍过于笼统,后者由于发布时间较早一直没有更新版本,也不能满足当前荷载试验的需要。根据公路桥梁建设发展趋势,公路桥梁静载试验必将更广泛的应用,有关规范体系有待完善。目前由长安大学主编的《公路桥梁荷载试验规程》还在征求意见阶段。本论文针对公路桥梁静载试验全过程进行分析,结合桥梁结构静载试验的三个阶段,即试验准备阶段、加载和观测阶段以及试验结果的分析总结阶段,确定影响试验结果的各个因素,并进一步分析各种影响因素的影响范围,总结出不同桥梁结构型式静载试验的主要影响因素,为以后的静载试验提供必要的经验积累和理论补充。
[Abstract]:At present, more than 600,000 highway bridges of various forms have been built in our country. In the course of operation, some bridges can no longer meet the requirements of current traffic loads due to traffic volume, loads, environmental effects and natural aging. Load tests are required to determine their bearing capacity and service performance (especially for existing bridges with incomplete original data, and based on which a bridge load limit or reinforcement scheme is determined. In addition, Load test can also test the design and construction quality of the new large bridge structure, which provides an accurate basis for the quality appraisal of the completion of the bridge. However, due to the lack of technical data and the theoretical analysis hypothesis, the performance of the test instrument and equipment can be obtained. At present, the actual bridge load test is often not satisfied with the influence of many factors, such as the quality of the examiner and the test environment. In China, the current standards for testing and evaluating the load-bearing capacity of highway bridges are mainly JTG / TJ21-2011) and "method of load Test for Long-Span concrete Bridges" (1982). The former introduces static load test too generally. The latter has not been updated before the release time, and can not meet the needs of the current load test. According to the development trend of highway bridge construction, the static load test of highway bridge will be used more widely. The relevant specification system needs to be consummated. At present, the "Highway Bridge load Test procedure" edited by Chang'an University is still in the stage of soliciting opinions. This paper analyzes the whole process of highway bridge static load test. Combined with the three stages of the static load test of bridge structure, namely, the stage of test preparation, the stage of loading and observation, and the stage of analysis and summary of the test results, the factors influencing the test results are determined, and the influence range of the various factors is further analyzed. The main influencing factors of the static load test of different bridge structure types are summarized, which provide necessary experience accumulation and theoretical supplement for the later static load test.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U441.2;U446.1
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本文编号：1683912