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在调研某古旧拱桥现况技术资料的基础上,利用三维激光扫描技术对拱桥现况几何外形及关键断面尺寸进行扫描形成基础资料,通过无损检测技术对拱肋、立柱、纵梁的材质特性、破损状况及锈蚀情况进行检查分析,最后建立了考虑耐久性病害损伤的结构有限元模型,进行了现况桥梁承载力评估分析,提出了具体的维修加固技术措施,进行了加固后桥梁承载力评估验算分析。研究表明:利用本文提出的古旧拱桥维修加固新技术,能有效积累古旧拱桥数据资料、准确判别结构耐久性病害状况、制定有效加固措施,满足维修加固技术新要求。
Based on the investigation of the current technical data of an ancient arch bridge, the basic data of the current status of the arch bridge and the key section dimensions are scanned by using the three-dimensional laser scanning technology. The material properties of the arch ribs, the columns and the stringers are analyzed by non- The damage status and the corrosion status of the bridge were checked and analyzed. Finally, the structural finite element model considering the damage of the durable disease was established, the assessment and analysis of the current bridge bearing capacity was carried out, the concrete technical measures for maintenance and reinforcement were put forward, the assessment of the bridge bearing capacity Check analysis. The research shows that using the new technology of ancient arch bridge repair and reinforcement proposed in this paper can effectively accumulate the data of the ancient arch bridge and accurately identify the durability of the structure and formulate effective reinforcement measures to meet the new requirements of maintenance and reinforcement technology.