摘要
为解决有限元模拟分析桥梁隧道静力特性结果与实际结果不符的问题,采用无人机航测多源数据研究桥梁隧道静力特性。根据数字相机的特性,利用共线数据之间的函数关系,把像点坐标以数值形式代入方程,再运用后方空间交会的方法求出相机的方位、畸变系数等一系列参数。地方坐标系的建立需借助城市CORS系统,以其测量的相关参数作为坐标数据。航摄设计的实现需要依靠摄影基线选择、像片重叠度分析等多层面的协同研究。结果显示,虽然隧道内外侧的钢筋都受到外界荷载和拉力的共同作用,但拱顶和拱底的外侧钢筋所受到的应力远远大于内侧。然而,拱腰右侧的内外钢筋的受力情况与拱顶和拱底之间的情况恰好相反,左拱肩所受的应力情况却与之相同。对桥梁静力特性进行分析,应按照腹板内力的不同进行钢束的差异化配置。经验证,大部分的测量结果均符合测量要求,表明无人机航测多源数据可用于桥梁隧道静力特性分析。
In order to solve the problem that the results of finite element simulation analysis of bridge and tunnel static characteristics are inconsistent with the actual results,the static characteristics of them are studied by using multi-source data of UAV aerial survey.According to the characteristics of digital camera,the image point coordinates are substituted into the equation in numerical form by using the functional relationship between collinear data,and then a series of parameters such as camera orientation and distortion coefficient are obtained by using the method of rear space intersection.The establishment of local coordinate system needs the help of urban CORS system,with the relevant parameters measured as coordinate data.The realization of aerial photography design needs to rely on multi-level collaborative research such as photographic baseline selection and photo overlap analysis.The results show that although the steel bars inside and outside the bridge and tunnel are subjected to the combined action of external stress and tension,the stress of the steel bars outside the top and bottom of the arch bridge is much greater than that inside,and the difference between the inside and bottom of the arch bridge is larger.The stress of the internal and external steel bars on the right side of the arch waist of the arch bridge is opposite to that between the vault and the arch bottom,but the stress of the left arch shoulder is the same.To analyze the static characteristics of the bridge,the differential configuration of the steel beam should be carried out according to the different internal forces of the web.It is verified that most of the measurement results meet the measurement requirements,indicating that the multi-source data of UAV aerial survey can be used for the static characteristics analysis of bridges and tunnels.
作者
聂丹
张海连
NIE Dan;ZHANG Hai-lian(Urban and Rural Architectural School,Minxi Vocational&Technical College,Longyan 364021 China;College of Materials Science and Engineering,Huaqiao University,Xiamen 362021,China)
出处
《辽东学院学报（自然科学版）》
CAS
2021年第4期252-257,共6页
Journal of Eastern Liaoning University:Natural Science Edition
基金
福建省教育厅中青年教师教育科研项目(科技类)(JAT191532)。
关键词
无人机航测
多源数据
桥梁
隧道
静力特性
UAV aerial survey
multi-source data
bridge
tunnel
static characteristics
