某连续箱梁病害分析及维修加固

发布时间：2018-03-16 19:42

本文选题：连续箱梁　切入点：现状检测　出处：《中外公路》2017年05期 　论文类型：期刊论文

【摘要】：某桥为三跨变截面预应力混凝土连续箱梁桥,运营多年,经检测,主体结构及桥面铺装等出现相应病害,桥梁总体结构处于较差状态,综合评定为三类桥,须采取有效措施进行维修加固处理。针对具体病害,采用有限元程序Midas与Ansys对结构进行分析,探讨病害产生的主要原因,并给出了相应的维修措施。针对箱梁顶板底面、底板底面及腹板裂缝,通过对顶板及底板底面粘贴碳纤维布、腹板内外侧粘贴钢板及增设体外预应力主动加固等措施,对结构受力进行补强,提高桥梁结构的安全性与耐久性;针对桥面铺装裂缝,通过更换水泥混凝土桥面铺装层并增设防水层,以提高桥梁的适用性与耐久性。桥梁维修加固后,经通车前的荷载试验评定,验证了加固措施的效果,桥梁的使用性能得到恢复。
[Abstract]:A bridge is a three-span prestressed concrete continuous box girder bridge with variable cross-section, which has been in operation for many years. After testing, the main structure and bridge deck pavement appear corresponding diseases, the overall structure of the bridge is in a poor state, and the overall structure is assessed as three types of bridges. It is necessary to take effective measures to carry out maintenance and reinforcement treatment. For specific diseases, the finite element program Midas and Ansys are used to analyze the structure, the main causes of the disease are discussed, and the corresponding maintenance measures are given. In order to improve the safety and durability of bridge structure, the cracks of bottom and bottom of bottom plate are strengthened by affixing carbon fiber cloth to roof and bottom surface, sticking steel plate inside and outside of web plate and adding external prestressing force to strengthen the structure. In order to improve the applicability and durability of the bridge, the cement concrete deck pavement layer is replaced and the waterproof layer is added to the cracks of the bridge deck pavement. After the bridge is repaired and strengthened, the effect of the reinforcement measures is verified by the load test before the bridge is opened to traffic. The performance of the bridge is restored.
【作者单位】：东南大学成贤学院;南通大学交通学院;
【分类号】：U445.7

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