【摘要】 针对武穴长江大桥"单侧非对称"的结构特点,以有限元基准模型为结构评估主线,综合施工期、成桥荷载试验、运营期三个阶段的监测需求,进行全寿命期监测系统的总体设计。分析塔、梁、索在各施工阶段的变形与受力特点,进行施工期监测系统设计;根据成桥状态支座反力和关键参数影响线特征,进行成桥荷载试验监测系统设计,重点关注支座摩阻力加载;综合抗震、抗风、桥址环境及交通荷载的监测需求,进行运营期监测系统设计。全寿命期监测系统的特点为:在各寿命阶段之间开展持续的有限元模型的修正工作,使得结构分析成果能够继承和更新;提出固定测点和移动测点、永久测点与临时测点、共用测点与专用测点等测点分类,充分利用健康监测系统设备并在施工期开始系统集成,使得测点在桥梁全寿命期内得到综合利用。更多还原

【Abstract】 According to the characteristics of a unilateral asymmetric structure of Wuxue Changjiang River Bridge,by using a finite element benchmark model as the main line of structural assessment,we performed the overall design for the life-cycle monitoring system after taking the monitoring demands of the construction period,the load tests of finished dead state,and the operation period into account.We analyzed the deformation and stress characteristics of tower,girder,and cable in different construction stages,and performed the design of a monitoring system in the construction period;we performed the design of a monitoring system for the load tests of finished dead state according to the support reaction force and the characteristics of the influence lines of key parameters in finished dead state,and put emphasis on the loading of the frictional resistance of bearings;we performed the design of a monitoring system in the operation period to meet the demands of earthquake resistance,wind resistance,bridge site environment,and the traffic load.The characteristics of the life-cycle monitoring system include:the continuous modification of finite element model is carried out between life periods so as to enable the structural analysis results to be inherited and updated;the classification of fixed and mobile measuring points,permanent and temporary measuring points,common and special measuring points is proposed,the health monitoring system equipment is fully utilized and the system integration begins during the construction period,so that the measuring points can be comprehensively utilized throughout the life-cycle periods.更多还原