超高车辆撞击受损混凝土简支梁桥试验评定与加固

发布时间：2018-05-20 03:43

本文选题：车辆撞击 + 混凝土梁桥　；参考：《哈尔滨工业大学》2015年硕士论文

【摘要】：经济的飞速发展使得我国各地城市规模不断扩大,随之而来的问题就是日益拥堵的交通,应运而生的是大量的城市跨线立交桥。城市桥梁在城市交通系统中占据着举足轻重的作用,但也存在巨大的安全隐患,超高车辆撞击跨线桥的事就屡有发生,事故造成桥梁结构不同构件损坏,使桥梁的使用性能和结构性能受到严重影响,这不仅严重威胁了交通的正常运营,而且造成了巨大的经济损失。国内外相继开展了一些有关超高车辆撞击跨线桥的研究,其主要利用一些大型有限元软件对超高车辆撞击桥梁桥墩和上部结构进行数值模拟,分析其撞击过程、破坏形式及破坏机理,但对于遭超高车辆撞击受损桥梁的试验评定和损伤参数分析研究还很少,随着这一现象的日益凸显,如何科学地评定超高车辆撞击桥梁的损伤程度,为桥梁维修、加固方面提供理论依据具有十分重要的意义。本研究以受超高车辆撞击的某简支桥梁作为研究对象,具体研究内容如下:(1)基于技术状况检测对受超高车辆撞击受损混凝土简支梁桥的承载能力进行评定,主要是对实际工程实例进行桥梁外观检测、材料状况及破损情况调查,获取评定桥梁实际承载能力的依据,并依据相应规范对桥梁使用状况和结构性能进行判定。(2)拟定荷载试验方案,对受损桥梁进行荷载试验,分析试验过程和试验结果,基于试验结果对受损桥梁进行承载能力检算评定。(3)参考相关模型修正理论,结合试验数据开展实际工程实例有限元模型修正。经修正后的模型需要对其进一步验证,验证通过后对其进行损伤预后参数分析,通过受损桥梁参数影响分析可通过数值仿真分析较为真实的模拟桥梁损伤后的承载力状况,为承载能力的数值模拟评定提供借鉴。(4)依据损伤预后参数分析结果和桥梁原始设计资料对桥梁维修加固进行分析,提出科学的加固方案,结合工程实际详细说明受损桥梁加固施工工艺,为受超高车辆撞击的桥梁加固维修提供一定参考。
[Abstract]:The rapid development of economy has made the scale of cities in all parts of our country expanding continuously. The following problem is the increasingly congested traffic, and the emergence of a large number of urban cross line overpasses. Urban bridges play an important role in the urban traffic system, but there are huge hidden dangers of security. It has happened repeatedly. The accident caused the damage of different components of the bridge structure, which seriously affected the performance and structural performance of the bridge, which not only seriously threatened the normal operation of the traffic, but also caused great economic loss. The finite element software is used to simulate the bridge pier and superstructure of the super high vehicle impact bridge. The impact process, the failure mode and the failure mechanism are analyzed, but the test evaluation and the damage parameter analysis of the damaged bridge are very few. With this phenomenon, how to assess the impact of the ultra high vehicle is scientifically evaluated. The damage degree of the bridge is of great significance for the maintenance and reinforcement of the bridge. This study takes a simple supported bridge affected by a super high vehicle as the research object. The specific research contents are as follows: (1) based on the technical condition detection, the bearing capacity of the damaged concrete simple supported beam bridge subjected to the impact of the super high vehicle is evaluated. It is mainly to investigate the actual project example, investigate the appearance of the bridge, the material condition and the damage situation, obtain the basis for evaluating the actual bearing capacity of the bridge, and judge the use and structure performance of the bridge according to the corresponding standard. (2) the load test scheme is drawn up, the load test is carried out on the damaged bridge, the test process and the test knot are analyzed. Based on the test results, the bearing capacity of damaged bridges is evaluated and evaluated. (3) reference model correction theory, combined with experimental data to modify the finite element model of actual engineering examples. The revised model needs to be further verified. After verification, the analysis of the damage prognosis parameters and the impact of damaged bridge parameters are affected. The analysis can be used to simulate the actual bearing capacity of bridge damage through numerical simulation, and provide reference for the numerical simulation evaluation of the bearing capacity. (4) according to the analysis results of the damage prognosis parameters and the original design data of the bridge, the bridge maintenance and reinforcement are analyzed, and the reinforcement scheme of the science is put forward, and the subject is explained in detail with the engineering practice. Loss of bridge reinforcement construction technology, for ultra high impact vehicle bridge reinforcement and maintenance to provide certain reference.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U445.72;U446

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