中文摘要：

基于监测应变，对胶州湾大桥的独塔自锚式悬索桥在不同施工阶段的塔侧支撑反力进行了识别。首先建立支撑结构的有限元模型，并根据主要监测点应变之间的协同关系，采用优化方法对有限元模型进行修正。然后，基于应变监测结果，针对钢箱梁吊装、吊杆张拉和临时支架拆除等各主要施工阶段，采用最小二乘法对塔侧支撑反力进行了识别，给出了历时1a的动态反力值。所获得的识别结果表明，塔侧支撑结构的应变监测子系统较好地发挥了其应有的功能。基于应变监测的识别方法，能够较好地反映不同施工阶段的实际工况，可以对相关结构做出有效的识别和评价。在反力识别的基础上，结舍吊杆、钢箱梁等其他部位的监测数据，可进一步实现对钢箱梁、吊杆的受力和工作状态的分析和评价。

英文摘要：

Based on strain monitoring, the identification of side support reaction of single-pylon self-anchored suspension bridge of Jiaozhou Bay Bridge in different construction stages is conducted. The finite element model of the support structure is developed at first, and the model is updated according to the coordinated relation among the monitored strains by adopting the optimization method. Then, based on the monitoring result of strain, pylon side support reactions are identified by using the least square method for construction stages of hoisting steel box girder, tensioning hangers and removing temporary supporters, and the dynamic reaction over a year is presented. The recognition result shows that （ 1 ） the strain monitoring subsystem of the pylon side support structure played its functions well; （2） strain monitoring-based identification method can better reflect the actual working conditions of different construction stages, and make effective identification and evaluation for the relevant structure; （3） based on the identified reaction force, the work for further analyzing and evaluation of steel box girder and hangers can be made by their monitoring data.