城市桥梁裂缝成因分析及防治研究
发布时间：2019-03-11 15:09
【摘要】：随着我国交通运输事业的发展,交通量与日俱增,车辆载重显著提高,加之人为及自然等因素的影响,使得我国城市桥梁在运营过程中出现了许多病害,而裂缝则是城市桥梁最为普遍的病害之一。因此,对病害中的城市桥梁采取修补加固措施,延长其使用寿命,是保障道路安全畅通与节省建设资金的重要举措。针对城市桥梁的裂缝病害,本文对城市混凝土桥梁的裂缝产生机理、防治措施及桥梁加固方法进行了相应研究。详细讨论了城市混凝土桥梁裂缝产生原因,在此基础上,进一步研究了城市桥梁裂缝防治技术,具体包括:裂缝修补技术、针对裂缝的桥梁加固原则及相应的加固方法等。重点研究了基于碳纤维的桥梁裂缝加固方法,对碳纤维加固的基本原理、施工工序、计算方法等进行了详细分析,进而为该技术在实际城市桥梁加固中的应用提供参考和借鉴。以济宁市吴泰闸路m8府河桥为算例,对基于碳纤维的城市桥梁加固方法进行了工程验证。由该桥梁加固前后的荷载试验结果可知,碳纤维加固方案效果十分显著,其不仅提高了桥梁结构的整体刚度,还改善了桥梁结构的动力性能,最重要的是其能抑制原有桥梁结构裂缝的发展,延长了桥梁结构的使用寿命。
[Abstract]:With the development of transportation in our country, the traffic volume is increasing day by day, the vehicle load is significantly increased, and the influence of man-made and natural factors makes the urban bridges in our country appear many diseases in the course of operation. Cracks are one of the most common diseases of urban bridges. Therefore, it is an important measure to repair and strengthen the urban bridges and prolong the service life of the urban bridges in order to ensure the safe and smooth traffic of the roads and save the construction funds. Aiming at the crack disease of urban bridge, this paper studies the mechanism, prevention and cure measures and strengthening method of the crack of urban concrete bridge. In this paper, the causes of cracks in urban concrete bridges are discussed in detail. On this basis, the prevention and treatment techniques of cracks in urban bridges are further studied, including crack repair technology, bridge reinforcement principles and corresponding reinforcement methods for cracks, and so on. The reinforcement method of bridge crack based on carbon fiber is studied in detail, and the basic principle, construction procedure and calculation method of carbon fiber reinforcement are analyzed in detail, so as to provide reference and reference for the application of this technology in the actual urban bridge reinforcement. Taking M8 Fuhe Bridge of Wutaizha Road in Jining as an example, the reinforcement method of urban bridge based on carbon fiber is verified in engineering. The results of load tests before and after the bridge reinforcement show that the effect of carbon fiber reinforcement scheme is very remarkable, which not only improves the overall stiffness of the bridge structure, but also improves the dynamic performance of the bridge structure. The most important thing is that it can restrain the development of the original bridge structure crack and prolong the service life of the bridge structure.
【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】：U445.71
本文编号：2438387
[Abstract]:With the development of transportation in our country, the traffic volume is increasing day by day, the vehicle load is significantly increased, and the influence of man-made and natural factors makes the urban bridges in our country appear many diseases in the course of operation. Cracks are one of the most common diseases of urban bridges. Therefore, it is an important measure to repair and strengthen the urban bridges and prolong the service life of the urban bridges in order to ensure the safe and smooth traffic of the roads and save the construction funds. Aiming at the crack disease of urban bridge, this paper studies the mechanism, prevention and cure measures and strengthening method of the crack of urban concrete bridge. In this paper, the causes of cracks in urban concrete bridges are discussed in detail. On this basis, the prevention and treatment techniques of cracks in urban bridges are further studied, including crack repair technology, bridge reinforcement principles and corresponding reinforcement methods for cracks, and so on. The reinforcement method of bridge crack based on carbon fiber is studied in detail, and the basic principle, construction procedure and calculation method of carbon fiber reinforcement are analyzed in detail, so as to provide reference and reference for the application of this technology in the actual urban bridge reinforcement. Taking M8 Fuhe Bridge of Wutaizha Road in Jining as an example, the reinforcement method of urban bridge based on carbon fiber is verified in engineering. The results of load tests before and after the bridge reinforcement show that the effect of carbon fiber reinforcement scheme is very remarkable, which not only improves the overall stiffness of the bridge structure, but also improves the dynamic performance of the bridge structure. The most important thing is that it can restrain the development of the original bridge structure crack and prolong the service life of the bridge structure.
【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】：U445.71
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